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I N S TA L L AT I O N G U I D E

CoreSense M10
Multi-gas monitoring system
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Disclaimer
This guide and any accompanying software are copyrighted and
all rights are reserved by ABB Inc. This product, including software
and documentation, may not be copied, photocopied, reproduced,
translated, or reduced, in whole or in part, to any electronic medium
or machine-readable format without prior written consent from ABB.
This document contains product specifications and performance
statements that may be in conflict with other ABB published
literature, such as product fliers and catalogs. All specifications,
product characteristics, and performance statements included in
this document are given as indications only. In case of discrepancies
between specifications given in this document and specifications
given in the official ABB product catalogs, the latter takes
precedence.
ABB reserves the right to make changes to the specifications of all
equipment and software, and contents of this document, without
obligation to notify any person or organization of such changes. Every
effort has been made to ensure that the information contained in this
document is current and accurate. However, no guarantee is given
or implied that the document is error-free or that the information is
accurate.
ABB makes no representations or warranties with regard to the
product and instructional and reference materials, including, but not
limited to, all implied warranties of merchantability and fitness for a
particular purpose.
ABB does not warrant, guarantee, or make any representations
regarding the use, or the results of the use, of any software or written
materials in terms of correctness, accuracy, reliability, currentness, or
otherwise. ABB shall not be liable for errors or omissions contained in
its software or manuals, any interruptions of service, loss of business
or anticipatory profits and/or for incidental or consequential
damages in connection with the furnishing, performance or use of
these materials, even if ABB has been advised of the possibility of
such damages.
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as to the results and performance of the equipment and software is
assumed by the user.
The software or hardware described in this document is distributed
under a license and may be used, copied, or disclosed only in
accordance with the terms of such license.
© ABB, 2019
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Table of Contents
1 Safety 5 Installing the sensor head
Symbol definitions...................................................5 Precautions.............................................................. 35
Personnel safety........................................................7 Connecting the sensor head.............................. 36
General lifting and carrying precautions.....7 Purging the sensor head..................................... 38
Handling the analytical unit.............................8 Earthing the sensor head.....................................41
Handling the sensor head................................8
6 Connecting the CoreSense M10
Electrical safety.........................................................8
Safety........................................................................ 43
INSTALLATION ON ENERGIZED
TRANSFORMERS.................................................9 Routing the sensor head conduit to the
analytical unit.......................................................... 44
Cybersecurity.............................................................9
Connecting the gas lines..................................... 46
Improper use............................................................10
Connecting the internal communication cable.
Technical limit values.............................................10
......................................................................................47
2 Introducing the CoreSense M10 Connecting the sensor head DC power cable....
Analytical unit.......................................................... 12 ..................................................................................... 48
Analytical unit status LEDs.............................14 Connecting the sensor head AC power cable....
Analytical unit communication ports.........14 ..................................................................................... 48
Touchscreen.............................................................15 Removing the terminal block cover............ 48
Sensor head and communication cable...........16 Connecting the cable...................................... 50
Sensor head status LEDs................................ 17 Connecting the mains AC power cable........... 52
Safety................................................................... 52
3 Preparing for installation Connecting the cable...................................... 53
Considering meteorological conditions..........19 Powering up the CoreSense M10...................... 56
Siting the analytical unit...................................... 20 Establishing SCADA connections..................... 56
Clearance requirements................................. 20 Establishing RS-485 connections......................57
Siting the sensor head.......................................... 21 Establishing analog 4–20 mA connections... 58
Clearance requirements..................................22 Outputs............................................................... 58
Planning your cabling............................................23 Inputs.................................................................. 59
Planning your communications......................... 24 Installing relays....................................................... 60
Gathering the installation tools........................ 25 Establishing optical Ethernet connections.....61
Supplied tools................................................... 25 Closing the analytical unit door.........................61
Spare parts........................................................ 25
Recommended tools (not provided).......... 25 7 Configuring CoreSense M10
Personal protection equipment.................. 25 Establishing communications........................... 64
Modifying default passwords............................ 65
4 Installing the analytical unit Setting the date and time................................... 67
Precautions...............................................................27 Activating the thermal pump............................. 69
Installing the mounting posts............................27
Installing the shock absorbers.......................... 29 8 Maintenance and troubleshooting
Placing the unit on the shock absorbers........ 30 Closing the analytical unit door......................... 71
Earthing the analytical unit..................................32 Cleaning the system.............................................. 71
Safety....................................................................32
 Troubleshooting...................................................... 71
Understanding cabinet LEDs........................72
Understanding sensor head LEDs...............73
Exporting the Events log................................74
Giving access to administrative settings on
the SCADA port..................................................75
Installing firmware updates................................76
Updating with a web browser.......................76
Updating with a USB key................................77
Taking an oil sample.............................................. 79

9 Technical specifications
Electrical specifications...................................... 83
Output circuits (alarm relays)....................... 83
Environmental specifications............................ 84
Mechanical specifications................................... 84
Measurement specifications............................. 84
Laser.......................................................................... 85
Communication...................................................... 86

A Physical installation checklist............ 87

B Connector definitions.......................... 89
Inputs and outputs.......................................... 89
Power and relays...............................................91

iv Installation Guide
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C h a p te r 1

Safety
This chapter provides an overview of the safety precautions that must be observed when operating the
instrument. For personnel and system safety, and to obtain optimum performance, read this manual
carefully and thoroughly before installing, using, or maintaining the instrument.

NOTICE
The design of this guide is based on the assumption that the CoreSense™ M10 system
is installed on a de-energized transformer. However, it is possible to install the system
on an energized transformer, assuming that all necessary safety precautions are heeded.
See “INSTALLATION ON ENERGIZED TRANSFORMERS” on page 9 for important
information about installation of CoreSense M10 systems on energized transformers.

If you do not fully understand the information contained in this guide, or if the instrument shows any
signs of damage, contact ABB. Refer to the back cover of this manual for contact information.

Symbol definitions
This document uses the following symbols to bring attention to key technical and safety-related
information.

DANGER—SERIOUS DAMAGE TO HEALTH/RISK TO LIFE

Indicates a hazardous situation that, if not avoided will result in death or serious injury.
When this symbol is encountered on the hardware, refer to the documentation for
important safety information.

WARNING — DAMAGE TO HEALTH/RISK TO LIFE

Indicates a hazardous situation that, if not avoided could result in death or serious injury.
When this symbol is encountered on the hardware, refer to the documentation for
important safety information.

CAUTION — DAMAGE TO HEALTH

Indicates a hazardous situation that, if not avoided, could result in minor or moderate
injury.

NOTICE
Indicates information considered important, but not hazard related, that could impact
things other than personal injury, like property damage.
 WARNING — HIGH VOLTAGE
Indicates the presence of electrical energy at voltages high enough to inflict harm on
living organisms.

WARNING — LASER R ADIATION

Indicates the presence of a laser related hazard. It also indicates the type of laser in use,
its wavelength and its safety class.

WARNING —SHARP EDGES

Indicates the presence of sharp edges that could cause personal injury if touched.

WARNING — HOT SURFACES

Indicates the presence of heat sufficient enough to cause burns.

ELECTROSTATIC DISCHARGES
Indicates a device or part of a device that is susceptible to electrostatic discharges.

Identifies any terminal intended for connection to an external conductor for protection
against electrical shock in case of a fault, or the terminal of a protective earth (ground)
electrode.

Identifies protective earth conductor terminals.

Indicates the presence of direct current.

6 Installation Guide
Personnel safety
WARNING
Failing to comply with any of the instructions, precautions or warnings contained in this
manual is in direct violation of the standards of design, manufacture, and intended use of
the instrument.
ABB assumes no liability for the user’s failure to comply with any of these safety
requirements, which may result in personal injuries and/or instrument damages.

• Do not, under any circumstances, remove warning and caution labels. Information must be available
at all times for the security of the user.
• If the instrument is used in a manner not specified by the manufacturer, the protection provided by
the equipment may be impaired.
• The instrument is intended for field installation by qualified service personnel according to
manufacturer’s installation instructions and local/national wiring requirements.
• Operators must strictly observe all applicable national regulations with regards to installation,
function tests, repairs, and maintenance of electrical devices.

General lifting and carrying precautions

The use of proper methods for lifting and handling objects protects against injury and makes work
easier. Over time, safe lifting technique should become a habit.
The following are essential steps to safe lifting and handling:
• Eyeball the load and check overall conditions. Do not attempt the lift by yourself loads that appear to
be too heavy or unwieldy.
• Make sure that there is enough room for movement, and that the footing is secure.
• Be careful with your balance. Feet should be shoulder width apart, with one foot behind the object
that is to be lifted and the other just beside it.
• Bend your knees (do not stoop). Keep your back straight (not necessarily vertical) and tuck your chin
(it helps straightening your back).
• Grip the load with the palm of your hands and your fingers.
• Push UP with your legs.
• Keep arms and elbows close to your body while lifting.
• Carry the load close to your body. Do not twist your body while carrying the load. To change
direction, shift your foot position and turn your whole body.
• To lower the object, again, bend your knees (do not stoop). To deposit the load on a bench or shelf,
place it on the edge and push it into position. Make sure your hands and feet are clear when placing
the load.

Safety 7
Handling the analytical unit
The CoreSense M10 analytical unit weighs 65 kg (144 lb). It is not designed to be installed by one
person. At least two people should be installing this unit.
To avoid personal injuries, make sure to follow the proper lifting and carrying instructions when
handling the instrument.

Handling the sensor head

The CoreSense M10 sensor head weighs 8 kg (18 lb). To avoid personal injuries, make sure to the proper
lifting and carrying instructions when handling the instrument.

WARNING
Do not grab the sensor head by the mounting threads. Thread edges are sharp and pose
a risk of personal injury.

WARNING
The sensor head contains an internal heater. Thus, some parts of the sensor head may be
hot when powered, i.e. all parts in contact with hot oil. Always handle the sensor head
with caution.
During operation, the brass mounting interface to the transformer valve becomes hot.
Avoid touching the surface of the mounting interface.

Electrical safety
WARNING
Failing to comply with any of the instructions, precautions or warnings contained in this
manual is in direct violation of the standards of design, manufacture, and intended use of
the instrument.
ABB assumes no liability for the user’s failure to comply with any of these safety
requirements, which may result in personal injuries and/or instrument damages.

ONLY qualified personnel may perform the electrical installation of the monitoring system.
In accordance with international safety standards, the monitoring system uses a three-wire power cord
or line typically connected to an electrical panel that provides grounding for the monitor chassis.
• CoreSense M10 is an overvoltage category II instrument.
• An external circuit breaker with a 8 A rating or less must be installed on the AC source and labeled
in compliance with your country’s national electrical code. Also, if required by this code, a circuit
breaker or switch in the building installation, marked as the disconnect switch, shall be in close
proximity to the equipment and within easy reach of the operator.
• Before opening the analytical unit cabinet, cut power at the distribution panel circuit breaker.
• Ensure that the equipment, and any device or power cord connected to the analytical unit, is properly
grounded.
• Make sure that the analytical unit earth is at the same potential as the transformer earth.

8 Installation Guide
• ONLY use power cords equipped with a protective earthing terminal.
• Protective earthing connections (grounding) must be active at all times.

DANGER
The absence of grounding can lead to a potential shock hazard that could result in serious
personnel injury.
If an interruption of the protective earthing is suspected, cut the power to the analytical
unit at the plant distribution panel and have the electrical circuit tested.

• In accordance with IEC61010-1 edition 3.0, to prevent contamination of the electronics by outside
elements, the analytical unit cabinet cover shall be opened only under controlled environmental
conditions defined as:
–– Temperature: between 5 °C (41 °F) and 40 °C (104 °F)
–– Maximum relative humidity: 80% for temperatures up to 31 °C (87 °F), decreasing linearly to 50%
relative humidity at 40 °C (104 °F).
• Do not expose sensor head innards to rain or snow.
• Use only fuse(s) specified as appropriate for this equipment (see “Technical specifications” on
page 83).

INSTALLATION ON ENERGIZED TRANSFORMERS

DANGER
The installation area must be secured. Tape off all limits of approach to the installation area,
and ensure that all personnel understand the risks associated with the installation procedure.

• Installation must be performed with feet on the ground (no work should be performed off of a
ladder or lift of any kind).
• The CoreSense M10 sensor head must be installed near ground level.
• Plan AC power connection to the analytical unit prior to all other work (connection location, needs
for additional fuses, etc.)
• De-energize the section of the analytical unit where the AC power cable will be connected. This
should be double-checked.
• All work in the analytical unit should be done while the unit is de-energized.
• Communication connections (Ethernet or SCADA) can be performed on energized transformers.

Cybersecurity
This product is designed to be connected to, and communicate information and data via a network
interface. It is the user’s sole responsibility to provide, and continuously ensure, a secure connection
between the product and the user’s network or any other network (as the case may be).
Users shall establish and maintain any and all appropriate measures (such as, but not limited to,
the installation of firewalls, the application of authentication measures, the encryption of data, the
installation of anti-virus programs, etc.) to protect the product, the network, its system and the
interface against any kind of security breaches, unauthorized accesses, interferences, intrusions,
leakages and/or theft of data or information.
Safety 9
ABB and its affiliates are not liable for damages and/or losses related to such security breaches, any
unauthorized access, interference, intrusion, leakage and/or theft of data or information.
ABB strives to maintain cybersecurity for its products and services. By visiting the web page, you
will find notifications about newly found software vulnerabilities and options to download the latest
software. It is recommended that you visit this web page regularly:
http://new.abb.com/about/technology/cyber-security
Information about your product is also available on the product page:
http://new.abb.com/products/transformers/service/advanced-services/coresense

Improper use
For configuration purposes, the sensor head can be powered when it does not contain any oil.
However, the thermal pump must be turned OFF. This can be done via the web interface (for more
information, see “Activating the thermal pump” on page 69). The CoreSense M10 is delivered with the
thermal pump turned OFF.
When installation is complete and air has been purged from the sensor head, make sure to enable the
thermal pump via the web interface.

NOTICE
The thermal pump is designed to operate while immersed in transformer oil. It will fail
within minutes if operated in air.

It is prohibited to use the monitoring system for any of the following (including, but not limited to):
• A climbing aid, e.g., for mounting purposes.
• A support for external loads, e.g., as a support for pipes.
• By adding material, e.g., by painting over the name plate, or welding/soldering on parts.
• By removing material from the sensor head, e.g., by drilling the housing.
Repairs, alterations, and enhancements, or the installation of replacement parts, are only permissible
as far as these are described in this manual. Approval by ABB must be requested in writing for any
activities beyond this scope. Repairs performed by ABB-authorized centers are excluded from this
article.

Technical limit values

The instrument is designed for use exclusively within the values stated on the nameplates and within
the technical limit values specified on the data sheets.

10 Installation Guide
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C h a p te r 2

Introducing the CoreSense M10

CoreSense™ M10 continuously monitors dissolved gas levels in transformer oil to provide early warnings
for incipient transformer faults. Additionally, CoreSense M10 can also continuously monitor moisture
levels, as moisture can accelerate transformer aging.
—
Figure 1 Overview of the CoreSense M10 multi-gas monitoring system
CoreSense M10
analytical unit

CoreSense M10 CoreSense M10

sensor head sensor head
attached conduit
Analytical unit
As part of the CoreSense M10 multi-gas monitoring system, the analytical unit is where gases extracted
from the transformer are analyzed. Analysis results allow for prevention of incipient transformer faults.
It is also the part of the system equipped for external communication and system configuration.
—
Figure 2 Overview of the CoreSense M10 analytical unit (closed)

Shock absorbers
(×4)

Status LEDs

Mounting posts
(×4)

12 Installation Guide
—
Figure 3 Overview of the CoreSense M10 analytical unit (open)
Relay module
and power entry
terminal block
Touchscreen

Cable cover

Communication
ports

Status lights
(from back)

Power entry port External

communication Analytical unit
entry port bulkhead fitting

Introducing the CoreSense M10 13

Analytical unit status LEDs
The meanings of the various analytical unit status LEDs are explained in “Maintenance and
troubleshooting” on page 71.
—
Figure 4 Analytical unit status LEDs

Analytical unit communication ports

The purpose of each of these ports is explained in more details in “Connecting the CoreSense M10” on
page 43 and “Appendix B” on page 89.
—
Figure 5 Analytical unit communication ports

14 Installation Guide
Touchscreen
The touchscreen inside the analytical unit allows you to monitor values and acknowledge events on site.
—
Figure 6 CoreSense M10 analytical unit touchscreen (Dashboard panel)

Dashboard Alarms and Instrument IP CoreSense M10

screen events screen address system general
4 – 20 mA information
input screen

—
Figure 7 CoreSense M10 analytical unit touchscreen (4 – 20 mA input panel)

Introducing the CoreSense M10 15

—
Figure 8 CoreSense M10 analytical unit touchscreen (Alarms and events panel)

Sensor head and communication cable

As part of the CoreSense M10 multi-gas monitoring system, the sensor head extracts gases from
the transformer and routes them through its permanently attached conduit for analysis inside the
analytical unit. LEDs provide status information about the ongoing processes (see “Maintenance and
troubleshooting” on page 71).
—
Figure 9 Overview of the CoreSense M10 sensor head (back)

1 1/2˝ NPT connector interface

to the transformer valve Sampling port
(hidden)

Rotating
flange
Attached conduit

Earthing
lug

16 Installation Guide
—
Figure 10 Overview of the CoreSense M10 sensor head (front)

LEDs

NOTICE
The length of the conduit attached to the sensor head is 10 meters (33 feet). Make sure
that the distance between the sensor head and analytical unit is at most 10 meters.

Sensor head status LEDs

The meanings of the various analysis sensor head status LEDs are explained in “Maintenance and
troubleshooting” on page 71.
—
Figure 11 Sensor head status LEDs

Introducing the CoreSense M10 17

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C h a p te r 3

Preparing for installation

Installing the CoreSense™ M10 monitoring system requires some planning. You need to plan:
• the physical location of the monitoring system analytical unit and sensor head,
• the power supply to the analytical unit cabinet (connection location, need for additional fuses, etc.)
• the necessary cables (see “Electrical specifications” on page 83 and “Communication” on
page 86,
• the required tools.
On a transformer, several mounting locations may be available for installing the analytical unit and
sensor head (see Figure 12 and Figure 14) (see also “INSTALLATION ON ENERGIZED TRANSFORMERS”
on page 9).
Care should be taken to select a mounting location:
• where the analytical unit will have sufficient clearance.
• that will allow for the analytical unit touchscreen to be positioned at eye level.
• where the sensor head will be exposed to maximal oil flow and minimal oil temperature fluctuations.

Considering meteorological conditions

Installation of the CoreSense M10 monitoring system should not be performed under the following
meteorological conditions:
• In rain
• In snow
• In highly windy/dusty conditions
• At temperatures below 5 °C (41 °F) or above 40 °C (104 °F)
• If the relative humidity level is above 80%.
(at temperatures up to 31 °C [87 °F], and decreasing linearly to 50% at 40 °C [104 °F])

NOTICE
The installator may pre-assemble the CoreSense M10 (connecting the sensor head conduit
to the open analytical unit cabinet, close the cabinet) in a temperature- and humidity-
controlled location (building, back of truck, etc.) that meets the proper environmental
standards, and then bring the whole assembly on location where installation can be
completed regardless of meteorological conditions.
Also, the installator can build a temperature-controlled temporary shelter at the
installation location and proceed to the installation there as long as environmental
conditions are met.
Siting the analytical unit
Since the CoreSense M10 analytical unit can be installed on the transformer wall or a wall adjacent
to the transformer, there are a few physical limitations to take into account before installing the
CoreSense M10 analytical unit.

Clearance requirements
You need to make sure that you have enough room to install the unit. You need enough clearance to be
able to install the unit mount properly, and also enough clearance to be able to fully open the unit door.
Below are the clearance requirements for the analytical unit.
—
Figure 12 CoreSense M10 analytical unit dimensions and clearance requirements (in mm)

(770.4) (335.3)

(924.8)

(881)

(771)

20 Installation Guide
Siting the sensor head
The CoreSense M10 sensor head can be installed at various locations on the transformer.
—
Figure 13 Possible locations for sensor head on a transformer

Acceptable
installation
location
Acceptable
C installation
location

Good A
installation
location Best
installation
location

The following table can be used to help select the best location for the sensor head:

WARNING — ENERGIZED TR ANSFORMER

In Figure 13, locations C and D must not be used in case of installation on an energized
transformer,

Preparing for installation 21

—
Table 1 Sensor head locations

Location Benefits Issues

A Good oil flow Connection flange rarely present

(Radiator return) Low operating temperature
Easily accessible

B Low operating temperature Low oil flow may increase reaction time
(Drain valve) Easily accessible Sludge could accumulate at this location
Always available

C Good oil flow from thermal Temperature may exceed 100 °C (212 °F)
(Top tank [fill convection Difficult to access
valve])
Installation requires working at height
Power down of transformer during installation mandatory
NOT TO BE USED FOR INSTALLATION ON ENERGIZED
TRANSFORMERS

D Good oil flow Temperature may exceed 100 °C (212 °F)

(Top of radiator) Difficult to access
Installation requires working at height
Connection flange rarely present
Power down of transformer during installation mandatory
NOT TO BE USED FOR INSTALLATION ON ENERGIZED
TRANSFORMERS

Clearance requirements
First, you need to make sure that you have enough room to install the head. Below are the clearance
requirements for the unit.
—
Figure 14 CoreSense M10 sensor head dimensions (in millimeters)

(392.9)

(158.1)

ThrEADED
1 1/2″ NPT

(264.1)

22 Installation Guide
Planning your cabling
Select cabling according to your communication needs. Refer to the table below for recommended
cable gauge or type.

NOTICE
Table 2 gives a general description of the necessary cables. More detailed information is
found in Appendix B on page 89.

Always comply with national codes and electrical standards.

—
Table 2 Recommended cable gauge and type

Cable Gauge/Type Maximum length

Copper-only wire 15 m (50 ft) (AWG #12)
(stranded WITH FERRULE or solid)
Power
AWG #18 to AWG #12 10 m (33 ft) (AWG #18)
90 °C 600V, UL and CSA type

Ground (earthing) 10 or 6 AWG 15 m (50 ft)

RS-485 24 AWG 1220 m (4003 ft)
Alarm relays 16 or 14 AWG N/A
4–20 mA 18 AWG N/A
SCADA (Ethernet) Category 5 cable 100 m (328 ft)
OPTICAL (Ethernet) ST-ST full duplex 62.5/125 multi-mode fiber 2000 m (6562 ft)
SERVICE (Ethernet) Category 5 cable 3 m (10 ft)
USB (service port) USB key only N/A

Preparing for installation 23

Planning your communications
The digital protocols supported by the system are Modbus, DNP3, and IEC 61850. Modbus and DNP3
are available on the RS-485 serial interface, the Ethernet SCADA port or the optical Ethernet port.
IEC 61850 is available on the Ethernet SCADA port or the optical Ethernet port.
Table 3 below shows the RS-485 serial configuration. These values cannot be modified.
—
Table 3 Default RS-485 configuration

Baud rate 9600

Data bit 8
Stop bits 1
Parity None
Flow control None

NOTICE
When using Modbus, the slave ID is 1.
When using DNP3, the outstation ID is 1.

—
Table 4 Summary of communication parameters

Port Default communication Setting options from web Protocol

setup page
Baud rate 9600 n/a Modbus (point to point
only):
Data bit 8 n/a
default slave ID = 1
RS-485 Stop bit 1 n/a Default DNP3 outstation
Parity None n/a ID = 1

Flow control None n/a

Static IP; DHCP client Web http port

SCADA • Static (IP 10.127.127.127) 80/tcp
Administrator settings on
(Ethernet) (if no network connected to Modbus TCP port
SCADA port can be enabled
port at startup) or disabled using the web 502/tcp
• DHCP client interface. DNP3 port
OPTICAL if network connected to When the fiber optic port is in 20000/tcp
(Ethernet) port at startup use, the Ethernet SCADA port IEC61850 MMS port
must not be used. 102/tcp
Default static IP address for ABB remote access can be
SERVICE
CoreSense: 10.126.126.126 enabled or disabled using the
(Ethernet)
web interface.

NOTICE
For best results it is recommended to configure the Modbus or DNP3 master with a
timeout of 10000 ms and 5 retries.
Minimum delay between polls shall be at least 100 ms.

24 Installation Guide
Gathering the installation tools
Once you have finished planning your installation, you need to assemble a set of all the equipment
necessary to perform the installation.

Supplied tools
• Metric hex (Allen) key set: 2.5 mm, 4 mm, 5 mm
• SAE open end wrench: ¼ in (6.35 mm), 5/16 in (7.98 mm)

Spare parts
The following is included with the monitoring system:
• Bleeding hose (ID 3.175 mm [1/8 in]): for sampling

Recommended tools (not provided)

• 50.8 mm (2.0 in) wrench, or adjustable wrench
• 13 mm (1/2 in) wrench, or adjustable wrench
• 8 mm (0.3 in) wrench, or adjustable wrench
• 8 × 10 mm (3/8 in) bolts, washers, and lock washers (for mounting post installation)
• Torque wrench
• Flat head screwdriver
• Drill and drill bits
• Bolt inserts
• Roll of Teflon (PTFE) tape
• Bucket and rags
• Level
• Wire stripper and wire cutter
• Laptop with a web browser (for sensor commissioning) (the latest version of Chrome, Firefox,
Internet Explorer and Safari is recommended)
• Straight RJ45 Ethernet cable (for sensor commissioning)
• Optical termination equipment (if installing the optional optical Ethernet port)
• Transformer valve adapter (when applicable)

Personal protection equipment

• Hard hat
• Safety shoes
• Gloves
• Protective glasses

Preparing for installation 25

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C h a p te r 4

Installing the analytical unit

Once your installation plan is complete and you have gathered all the necessary tools, you can proceed
with installation of the CoreSense™ M10 multi-gas monitoring system.

NOTICE
The following procedures are recommendations based on best practices, but final
decisions as to the best method of installing the analytical unit belong to the technical
person in charge on site.

NOTICE
The analytical unit must be installed on a vertical or near-vertical wall (no more than 2°
from vertical).

Precautions
WARNING
Installing the CoreSense M10 multi-gas monitoring system requires at least a team of two.

WARNING
The CoreSense M10 analytical unit weighs over 65 kg (144 lb). It could cause serious
injuries or even death if it were to tip over and/or fall on someone.

Installing the mounting posts

Mounting posts are used to fix the analytical unit to a vertical surface (transformer wall or adjacent
wall). When installing the mounting posts, keep in mind that, once installed, the analytical unit
touchscreen should be at approximately eye level.
Installing the mounting posts is the first step in installing the CoreSense M10 system.
To do so:
1 Position the provided installation template flat on the wall where the analytical unit will be installed.
2 Mark the location of the eight 10 mm (0.375 in) screw holes on the wall. It is recommended that one
team member holds the installation template while another proceeds with the markings.
—
Figure 15 Analytical unit installation template

Screw holes (×8)

3 With a drill powerful enough, and appropriate drill bits, drill the eight screw holes.
4 Screw in the four mounting posts as shown below (screws, washers and lock washers not provided).
—
Figure 16 Installing a mounting post

28 Installation Guide
Installing the shock absorbers
Once the mounting posts are properly installed, you need to install the shock absorbers that are
designed to counter system and environmental vibrations.
To do so:
1 Position a shock absorber on a mounting post.
2 Position the nuts and washers.
3 Tighten the provided M8 screw by hand, and then up to the required torque (21.1 N·m [15.6 lb.ft]).
—
Figure 17 Screwing in the shock absorbers

4 Repeat steps 1 to 3 for the three remaining shock absorbers.

Installing the analytical unit 29

Placing the unit on the shock absorbers
WARNING
The CoreSense M10 analytical unit weighs over 65 kg (144 lb). It could cause serious
injuries or even death if it were to tip over and/or fall on someone.

Once the mounting posts and shock absorbers are properly installed, you need to position the
analytical unit.
ABB recommends using a sling and a crane to lift the unit up on to the mounting posts. To this end,
slots are designed in the unit mounting frame to help lift up the unit.
—
Figure 18 Lifting slots on back of unit

Lifting slots

However, the following procedure explains how an installation team should install the unit by hand. It is
important to follow the general lifting and handling precautions given on page 7.
To place the unit on the mounting posts:
1 With one team member on each side of the analytical unit, lift the unit upright.
2 With proper lifting technique, lift up the analytical unit and lower it on the four shock absorbers.
Make sure that the top holes on the shock absorbers are properly aligned with the bottom holes in
the mounting frame (see Figure 19).

30 Installation Guide
—
Figure 19 Positioning the unit on the shock absorbers

Mounting screw

Shock absorber

Mounting post

3 Insert the screw through the mounting frame and in the shock absorbers.
Shock absorbers minimize the effects of vibrations, shocks, and bumps on the analytical unit, and
provide a certain amount of protection against seismic activity (Class 1 of IEC 60255, part 21).

NOTICE
It is critical that the two cups maintaining the internal spring aligned do not come in
contact with each other, either radially or axially, as this would cancel the protective
effects of the shock absorber.

Axial gap

Radial gap

4 Tighten the M8 screw by hand, and then up to the required torque (21.1 N·m [15.6 lb.ft]).
5 Repeat steps 3 and 4 for the three remaining shock absorbers.
Installing the analytical unit 31
Earthing the analytical unit
Safety
ONLY qualified personnel may perform the electrical installation of the monitoring system.
In accordance with international safety standards, the monitoring system uses a three-wire power cord
or line typically connected to an electrical panel that provides grounding for the monitor chassis.
• Ensure that the equipment, and any device or power cord connected to the analytical unit, is properly
grounded.
• Make sure that the analytical unit earth is at the same potential as the transformer earth.
• ONLY use power cords equipped with a protective earthing terminal.
• Protective earthing connections (grounding) must be active at all times.

DANGER
The absence of grounding can lead to a potential shock hazard that could result in serious
personnel injury.
If an interruption of the protective earthing is suspected, cut the power to the analytical
unit at the plant distribution panel and have the electrical circuit tested.

To earth the analytical unit cabinet:

1 Attach one end of the earthing wire to an earthing rod in the ground in the vicinity of the
transformer (for grounding wire gauge, see Table 2 on page 23).
2 Attach the other end of the earthing wire to the cabinet earthing lug located outside the cabinet, on
the left hand side (see Figure 20 on page 33).

32 Installation Guide
—
Figure 20 Cabinet earthing lug

Cabinet
earthing lug
with earthing
wire

Earthing lug
To earthing
rod

Installing the analytical unit 33

Page intentionally left blank
—
C h a p te r 5

Installing the sensor head

Once your installation plan is complete and you have gathered all the necessary tools, you can proceed
with installation of the CoreSense™ M10 multi-gas monitoring system.

Precautions
WARNING
Do not grab the sensor head by the mounting threads. Thread edges are sharp and pose
a risk of personal injury.

WARNING
Do not handle the sensor head by the attached conduit. This could break the interface
between the conduit and the fitting, possibly losing the IP rating and allowing for
substance (water) ingress.

NOTICE
Do not expose sensor head innards to rain or snow.

The CoreSense M10 sensor head is delivered with the thermal pump turned OFF. When installation
is complete and the sensor head is in contact with oil, make sure to enable the thermal pump (see
"Activating the thermal pump" on page 69).

NOTICE
The thermal pump is designed to operate while immersed in transformer oil. It will fail
within minutes if operated in air.
Connecting the sensor head
The sensor is designed to be installed on a 1.5 NPT transformer valve.
1 Remove the black rubber cap covering the sensor head male fitting. Make sure that both the sensor
head male fitting and the transformer valve female fitting are clean.

NOTICE
Do not expose the sensor head innards to rain or snow.

2 Wrap the sensor head fitting thread with Teflon (PTFE) tape.

3 Loosen the eight rotating flange screws with the 5 mm (0.2 in) hex key so that the flange can rotate
freely.

36 Installation Guide
4 Connect the sensor head to the transformer valve.

An optional adapter can be used if the valve fitting is not NPT 1.5 (e.g., most North American valves
are NPT 2).
5 Tighten the connection with a wrench (50.8 mm [2-in] or adjustable wrench).

6 Once the head-valve connection is fully tightened, make sure that the sensor head is positioned
horizontally and that its sampling access panel is pointing upwards. Rotate the head as necessary.

NOTICE
Failure to position the CoreSense M10 sensor head horizontally, with the access panel
pointing upwards, will cause the thermal pump to malfunction and may result in
erroneous readings.

Installing the sensor head 37

7 Tighten all rotating flange screws by hand.
8 With the 5 mm hex key, tighten the rotating flange screws to 8.1 N·m (6.0 lbf.ft) according to the
tightening pattern below.

1 8

5 4

3 6

7 2

NOTICE
The rotating flange screws must be tightened to 8.1 N·m (6.0 lbf.ft) to prevent oil leaking
from the rotating flange.
Do not apply excessive torque.

Purging the sensor head

Once the sensor head has been properly installed, you need to purge the air out of the unit. This is
performed through the sampling adapter. As indicated by the label on top of the adapter cover (see
image below), the sensor head sampling adapter port is delivered in an open state.


SAFETY
WARNING

Sensor’s bleeding valve is OPEN upon delivery

Air bubbles in the tank of an energized transformer
pose a serious safety risk. In order to prevent air
bubbles entering the transformer during installation:

1 Ensure the bleeding port is open BEFOrE opening

the transformer valve. Close the bleeding port only
after all air in the transformer valve has been
properly purged.
AA020346-01 Rev_B

2 Ensure the transformer has a positive gauge

pressure before opening the transformer valve.
Never open the valve of a transformer with negative
gauge pressure while the transformer is energized.

38 Installation Guide
To purge the sensor head:
1 Remove the external sampling port cover located on top of the sensor with the 4 mm hex key.

2 Connect the provided bleeding hose (ID 3.18 mm [0.125 in]) to the sampling adapter.
3 Direct the other end of the bleeding hose in an oil container to collect all the purged oil.
4 Slowly open the transformer valve and wait until oil comes out of the sensor (about 20 seconds; this
ensures that all air is purged).

NOTICE
Make sure that the transformer is in positive pressure before opening the transformer
valve.
Make ABSOLUTELY SURE that there are no bubbles left in the bleeding hose.

Installing the sensor head 39

5 Tighten the bleed screw to a maximum torque of 2.26 N·m (20 lbf.in).

NOTICE
Do not apply excessive torque.

6 Wipe excess oil with a clean cloth.

7 Re-install the external sampling port cover and secure it with the 4 mm hex key.

40 Installation Guide
Earthing the sensor head
To earth the sensor head:
1 Attach one end of the earthing wire to an earthing rod in the ground in the vicinity of the sensor
head (for grounding wire gauge, see Table 2 on page 23).
2 Attach the other end of the earthing wire to the sensor head earthing lug located underneath the
head.
—
Figure 21 Overview of the CoreSense M10 sensor head (back)

To earthing rod
Earthing wire

Installing the sensor head 41

Page intentionally left blank
—
C h a p te r 6

Connecting the CoreSense M10

Once the CoreSense™ M10 analytical unit and sensor head are installed, you have to connect the two via
the conduit attached to the sensor head. You also need to supply power to the system.

WARNING
Failing to comply with any of the instructions, precautions or warnings contained herein
is in direct violation of the standards of design, manufacture, and intended use of the
instrument.
ABB assumes no liability for user failure to comply with any of these safety requirements,
which may result in personal injuries and/or instrument damages.

Safety
ONLY qualified personnel may perform the electrical installation of the monitoring system.
In accordance with international safety standards, the monitoring system requires a three-wire power
cord or line typically connected to an electrical panel that provides grounding for the analytical unit and
sensor head.
• CoreSense M10 is an overvoltage category II instrument.
• An external circuit breaker with a 8 A rating or less must be installed on the AC source and labeled
in compliance with your country’s national electrical code. Also, if required by this code, a circuit
breaker or switch in the building installation, marked as the disconnect switch, shall be in close
proximity to the equipment and within easy reach of the operator.
• Operators must strictly observe all applicable national regulations with regards to installation,
function tests, repairs, and maintenance of electrical devices.
• Before opening the analytical unit cabinet, disconnect power at the distribution panel circuit breaker.
• Ensure that the equipment and any device or power cord connected to it is properly grounded.
• Make sure that system and transformer grounds are at the same potential.
• ONLY use power cords equipped with a protective grounding terminal.
• Protective grounding connections must be active at all times.

DANGER
The absence of grounding can lead to a potential shock hazard that could result in serious
personnel injury.
If an interruption of the protective grounding is suspected, cut the power to the system at
the plant distribution panel and have the electrical circuit tested.
• In accordance with IEC61010-1 edition 3.0, to prevent contamination of the electronics by outside
elements, the analytical unit cabinet cover shall be opened only under controlled environmental
conditions defined as:
–– Temperature: between 5 °C (41 °F) and 40 °C (104 °F)
–– Maximum relative humidity: 80% for temperatures up to 31 °C (87 °F), decreasing linearly to 50%
relative humidity at 40 °C (104 °F).
• Use only fuse(s) specified as appropriate for this equipment (see “Technical specifications” on
page 83).

Routing the sensor head conduit to the analytical unit

The sensor head and analytical unit are linked by a single conduit permanently attached to the sensor
head. That conduit contains all gas, communication, and power lines necessary for interaction between
sensor head and analytical unit during system operation.
To connect the attached conduit to the analytical unit, you first need to access the unit connection
ports.
To do so:
1 Open the analytical unit door:
a Loosen the screws that hold the five latches over the door.
b Slide the latches away from the door.
c Open the door.

WARNING
Before opening the door, make sure that nothing is sitting on top of the cabinet, as
this could fall and cause personnel injuries.

2 Unscrew and remove the cable cover (see Figure 22 on page 44.)
—
Figure 22 Removing the internal cable cover

Cable cover

Analytical unit bulkhead fitting

44 Installation Guide
3 Remove the cover from the analytical unit bulkhead fitting.
4 On the attached conduit, remove the cover from over the internal cables.
5 Remove the bulkhead fitting nut and tooth washer from the small plastic bag tie-wrapped near the
conduit end.
6 From the attached conduit, route the five internal cables and conduit connector end through the
bulkhead fitting.
—
Figure 23 Cables coming from the attached conduit (once inside the cabinet)

Gas lines 1 and 2

Sensor head
AC power cable

Sensor head
DC power cable

Internal Analytical
communication unit bulkhead
cable fitting nut

Tooth washer

7 Slide the tooth washer over the routed cables so that is comes in contact with the bulkhead.
8 Slide the bulkhead fitting nut over the routed cables and onto the tooth washer.
9 Screw the nut to the sensor head conduit connector head coming though to the analytical unit
bulkhead fitting.

NOTICE
To ensure that the analytical unit retains its environmental protection rating, make sure
that the cable connector is pressed hard against the fitting gasket.

Connecting the CoreSense M10 45

Connecting the gas lines
Gas lines route gases from the sensor head to the analytical unit. They are made from semi-rigid
stainless steel tubing.

NOTICE
You can connect any of the gas lines to any of the two gas connectors inside the unit.

To connect the gas lines:

1 Stretch out the gas line tubing slightly to bring its tip to a gas connector inside the cabinet.
—
Figure 24 Gas connectors inside the cabinet

Gas connectors

2 Push the tip slowly but firmly into the connector opening until you feel it make contact at the bottom
of the opening.
3 Tighten the screw by hand as much as possible.
4 Once tightness has been achieved, apply a final 1/8 to 1/4 turn (45° to 90°) with a small torque wrench.

NOTICE
Use a second wrench to prevent movement on the fitting body.
Do not apply excessive torque as this might permanently damage the connection.

The conduit screw must be properly tightened to prevent gas leaking from the
connection point.

5 Repeat steps 1 to 4 for the second gas line.

6 Route the three remaining cables (sensor head AC, sensor head DC, Modbus) immediately to the left
of the bulkhead fitting.
7 Put back the cable cover.
46 Installation Guide
Connecting the internal communication cable
The sensor head and analytical unit communicate via a proprietary communication cable.
To connect the communication cable:
1 Of the cables coming from the sensor head conduit, identify the one with the orange and blue
internal wires.
—
Figure 25 Communication cable configuration

TX+
TX–
RX+
RX–
GND

2 Connect each of the five wires in the appropriate socket on the HU485 connector (see below).
—
Figure 26 Analytical unit connection board
HU485 connector Sensor head DC power connector

NOTICE
For more information on the various communication cables used, see Table 4 on
page 24 and “Connector definitions” on page 89.
For more information on configuring the communication protocols, refer to the
CoreSense M10 Monitoring System User Guide.

Connecting the CoreSense M10 47

Connecting the sensor head DC power cable
The sensor head DC power cable sends low voltage power to the sensor head for almost every electrical
task except the heating element.
1 Of the cables coming from the sensor head conduit, identify the one with the red and black internal
wires.
—
Figure 27 Low power cable configuration

+15 VDC
GND
+15 VDC
GND
GND

2 Connect each of the five wires in the appropriate socket on the sensor head DC power connector
(HU DC Power, Figure 26).

Connecting the sensor head AC power cable

To connect the sensor head AC power cable, you first need to access the power entry terminal block.
Once the terminal block is accessible, you need to route the power cable as explained in the following
pages.

Removing the terminal block cover

To make the terminal block accessible, you first need to remove its cover.

WARNING
Before opening the analytical unit door, make sure that nothing is sitting on top of the
unit, as this could fall and cause personnel injuries.

48 Installation Guide
1 Open the analytical unit door:
a Loosen the screws that hold the five latches over the door.
b Slide the latches away from the door.
c Open the door.
2 Loosen the two screws holding the terminal block cover in place (see Figure 28).
—
Figure 28 Loosening the two screws holding the terminal block cover

3 Slide out the terminal block cover, exposing the terminals.

—
Figure 29 Removing the terminal block cover

System
electronics
grounding
cable

Connecting the CoreSense M10 49

Connecting the cable
NOTICE
All terminals are properly identified in the instrument itself to simplify installation.

1 Of the cables coming from the sensor head conduit, identify the one with green, blue and brown
internal wires. This is the AC power cable.
—
Figure 30 Sensor head AC power cable configuration
hU Live
LINE
hU Neutral
NEUTrAL
Earth
EArTh

2 Route the wire under the cable guides found at the bottom and on the left-hand side of the
analytical unit cabinet (see Figure 31 on page 50.)
—
Figure 31 Routing the sensor head AC power cable

Cable guides

Protection rail
top cover

NOTICE
Once the installation is complete, it is strongly suggested to use tie wraps (in white on
Figure 31) to secure the cables to the cable guides.

3 Remove the protection rail top cover (see Figure 31) and continue routing the wire through the upper
protection rail all the way to the appropriate terminal, as illustrated in Figure 32.

50 Installation Guide
—
Figure 32 Routing the sensor head AC power cable to the terminal block

Protection
rail top cover

4 Connect each wire in the appropriate terminal.

—
Figure 33 Connecting the sensor head AC wires

Connecting the CoreSense M10 51

Connecting the mains AC power cable
Once all internal connections have been completed, you need to bring power to the analytical unit from
the power distribution panel.

NOTICE
It is the user’s responsibility to provide a power cord that fits local electrical requirements.

Safety
ONLY qualified personnel may perform the electrical installation of the monitoring system.
In accordance with international safety standards, the monitoring system requires a three-wire power
cord or line typically connected to an electrical panel that provides grounding for the analytical unit and
sensor head.
• Operators must strictly observe all applicable national regulations with regards to installation,
function tests, repairs, and maintenance of electrical devices.
• Ensure that the equipment and any device or power cord connected to it is properly grounded.
• Make sure that the system earth is at the same potential as the transformer earth.
• ONLY use power cords equipped with a protective grounding terminal.
• Protective grounding connections must be active at all times.

DANGER
The absence of grounding can lead to a potential shock hazard that could result in serious
personnel injury.
If an interruption of the protective grounding is suspected, cut the power to the system at
the plant distribution panel and have the electrical circuit tested.

• In accordance with IEC61010-1 edition 3.0, to prevent contamination of the electronics by outside
elements, the analytical unit cabinet cover shall be opened only under controlled environmental
conditions defined as:
–– Temperature: between 5 °C (41 °F) and 40 °C (104 °F)
–– Maximum relative humidity: 80% for temperatures up to 31 °C (87 °F), decreasing linearly to 50%
relative humidity at 40 °C (104 °F).
• Do not expose the analytical unit innards to rain or snow.
• An external circuit breaker with a 8 A rating or less must be installed on the AC source and labeled
in compliance with your country’s national electrical code. Also, if required by this code, a circuit
breaker or switch in the building installation, marked as the disconnect switch, shall be in close
proximity to the equipment and within easy reach of the operator.

WARNING — ENERGIZED TR ANSFORMER

In case of an installation on energized transformers, plan this power connection prior to
all other work (connection location, needs for additional fuses, etc.)

52 Installation Guide
—
Figure 34 Mains AC power cable configuration

hU Live
LINE
hU Neutral
NEUTrAL
Earth
EArTh

AC Live
Copper-only wire Flat screwdriver
100–240 V AC, single phase
(stranded WITH FERRULE or solid) Ø 6.0 mm
AC Neutral 50–60 Hz
AWG #18 to AWG #12
8A max.
90 °C 600V, UL and CSA type Flat screwdriver
AC Earth
Ø 3.5 mm

NOTICE
The mains power cable must be able to withstand a minimal top operating temperature
of 90 °C.

Connecting the cable

NOTICE
All terminals are properly identified in the instrument itself to simplify installation.

To connect the cable:

1 Insert the cable through the power entry port and route it under the cable guide found on the left-
hand side of the analytical unit cabinet (see Figure 35 on page 53).
—
Figure 35 Routing the mains power cord toward the power entry terminal block
Power
entry port

Connecting the CoreSense M10 53

 NOTICE
Once the installation is complete, it is strongly suggested to use tie wraps (in white on
Figure 35) to secure the cables to the cable guides.

Remove the protection rail top cover and continue routing the wire through the upper protection rail
all the way to the appropriate terminal, as illustrated in Figure 35.
—
Figure 36 Routing the mains power cable to the terminal block (sensor head AC cable not shown, for clarity)

Protection
rail top cover

2 Connect each wire in the appropriate terminal, as shown below.

—
Figure 37 Connecting the mains power AC cable (sensor head AC cable not shown, for clarity)

54 Installation Guide
3 Once both AC power cables are properly connected, put back the terminal block cover.
—
Figure 38 Putting back the terminal block cover

4 Tighten the screws that hold the terminal block cover.

—
Figure 39 Tightening the two screws holding the terminal block cover

Connecting the CoreSense M10 55

Powering up the CoreSense M10
NOTICE
NEVER try and start the system if the ambient temperature is below –40 °C (–40 °F).

Once all connections are properly set, you can power up the monitoring system.
To do so, simply close each breaker switch, as shown in Figure 40.
—
Figure 40 Pulling the breaker switches to power up the monitoring system

Establishing SCADA connections

ABB recommends using a Cat5 Ethernet cable.

NOTICE
Do not use the optical Ethernet port when using the copper-based SCADA Ethernet port.

56 Installation Guide
Establishing RS-485 connections
The RS-485 can be used in full- or half-duplex mode (see Figure 41). All signals on RS‑485 (J18) are
isolated.
The RS-485 interface is intended to be used in point-to-point mode. There is no need to add a 120 Ω
termination on the receiver (Rx); the resistor is present on board. The transmitter (Tx) must be
terminated at the other end.
Other RS-485 topologies are not supported.

NOTICE
Use only shielded cable for wiring the RS-485 interface.

—
Figure 41 RS-485 wiring details (full duplex - left, half duplex - right)

Case Case

Tx+ Tx– GND Rx– Rx+ Tx– GND Tx+

Rx– Rx+

NOTICE
For more information on the various communication cables used, see Table 4 on
page 24 and “Connector definitions” on page 89.
For more information on configuring the communication protocols, refer to the
CoreSense M10 Monitoring System User Guide.

Connecting the CoreSense M10 57

Establishing analog 4–20 mA connections
Outputs
WARNING
Use only shielded cables for wiring the 4–20 mA outputs interface.

—
Figure 42 Wiring 4–20 mA analog outputs

Case

Input

NOTICE
For more information on the various communication cables used, see Table 4 on
page 24 and “Connector definitions” on page 89.
For more information on configuring the communication protocols, refer to the
CoreSense M10 Monitoring System User Guide.

58 Installation Guide
Inputs
The 4–20 mA input range can be configured using the web interface.

WARNING
Shielded cable must be used for connecting to the 4–20 mA outputs.

—
Figure 43 Self-powered analog input wiring

Case

Active

—
Figure 44 Loop-powered analog input wiring (two-wire - left, three-wire - right)

Case Case

NOTICE
For more information on the various communication cables used, see Table 4 on
page 24 and “Connector definitions” on page 89.
For more information on configuring the communication protocols, refer to the
CoreSense M10 Monitoring System User Guide.

Connecting the CoreSense M10 59

Installing relays
This is the diagram to install the communication relays between external sensors and the
CoreSense M10. These relays are underneath the terminal box (see Figure 3 on page 13). For more
information, see “Power and relays” on page 91.
—
Figure 45 Relays

—
Table 5 Relay behavior

Relay 1 1 if the instrument is functional (blue LED off)

(Maintenance) 0 if there is a problem with the CoreSense M10 (blue LED lit)

Relay 2 1 if no gas alarm is active (green LED it)

(System) 0 if an alarm is active (warning or alarm). (green LED off)

Relay 3 1 if one of the elements analyzed by CoreSense M10 is in warning (yellow LED lit)
(Warning) 0 if no warning on analyses (yellow LED off)

Relay 4 1 if one of the elements analyzed by CoreSense M10 is in alarm(red LED lit)
(Alarm) 0 if no alarm on analyses (red LED off)
Examples of combined relay behavior
1-1-0-0 System OK
0-0-0-0 Internal problems, and gas concentration predictions not possible
1-0-1-0 If a gas concentration is above a threshold but below an alarm
1-0-0-1 In case of excessive gas concentrations

60 Installation Guide
Establishing optical Ethernet connections
Use 62.5/125 μm or 50/125 μm multimode optical fibers to connect to the 100Base-FX optical Ethernet
connector. Before connecting the optical transceiver, see “Communication” on page 86 for more
information on the optical characteristics. Make sure optical power levels and wavelength are within the
specified range.

NOTICE
Do not use the copper-based SCADA Ethernet port when using the optical Ethernet port.
For more information on the various communication cables used, see Table 4 on
page 24 and “Connector definitions” on page 89.
For more information on configuring the communication protocols, refer to the
CoreSense M10 Monitoring System User Guide.

Closing the analytical unit door

The CoreSense M10 analytical unit complies with the IP66 and NEMA 4X standards.
To ensure that the unit remains compliant when you close the unit door, you must tighten the unit latch
screws to 9 N·m (80 lbf.in) according to the sequence indicated below:
—
Figure 46 CoreSense M10 door latch tightening sequence

1
3

96

85

j7

4
2

Connecting the CoreSense M10 61

Page intentionally left blank
—
C h a p te r 7

Configuring CoreSense M10

Once the CoreSense™ M10 is properly installed and powered, you must configure basic system
parameters at system startup.

NOTICE— CYBERSECURITY
This product is designed to be connected to, and communicate information and data via
a network interface. It is the user’s sole responsibility to provide, and continuously ensure,
a secure connection between the product and the user’s network or any other network (as
the case may be).
Users shall establish and maintain any and all appropriate measures (such as, but not
limited to, the installation of firewalls, the application of authentication measures, the
encryption of data, the installation of anti-virus programs, etc.) to protect the product, the
network, its system and the interface against any kind of security breaches, unauthorized
accesses, interferences, intrusions, leakages and/or theft of data or information.
ABB and its affiliates are not liable for damages and/or losses related to such security
breaches, any unauthorized access, interference, intrusion, leakage and/or theft of data or
information.
ABB strives to maintain cybersecurity for its products and services. By visiting the web
page, you will find notifications about newly found software vulnerabilities and options to
download the latest software. It is recommended that you visit this web page regularly:
http://new.abb.com/about/technology/cyber-security
Information about your product is also available on the product page:
http://new.abb.com/products/transformers/service/advanced-services/coresense
Establishing communications
To establish communication, you need to connect to the system.
To do so:
1 With a straight RJ45 Ethernet cable, connect your laptop to the SCADA communication port on the
analytical unit (see “Analytical unit communication ports” on page 14).
2 Open your web browser and point it to the default IP address http://10.127.127.127
This address points to the CoreSense M10 dashboard.
—
Figure 47 CoreSense M10 dashboard

64 Installation Guide
Modifying default passwords
With the CoreSense™ M10 system, parameters and functions are made available depending on the
password used to access the system (rather than user names).
For cybersecurity reasons, it is absolutely mandatory to change the default passwords. Not doing so
could expose your entire network to cyberattacks.
The default operator and administrator passwords are:
• Operator Ack
• Administrator Admin
To modify passwords:
1 From the CoreSense M10 dashboard (see Figure 47), click Settings. The Settings page appears.
—
Figure 48 CoreSense M10 Settings page

2 Click Administration settings.

The first time that you try to access this page, you will be asked to enter a password. Enter the
administrator password shown above. The Administration settings page appears.
3 In the General settings section, enter passwords for both operators and administrators.

NOTICE
Passwords accept letters (including capitals) and numbers, but not special characters.
Passwords cannot be more than 25 characters long.

Configuring CoreSense M10 65

—
Figure 49 Settings section

4 At the bottom of the page (depending on the size of your screen, you might have to scroll down),
click Apply to save the new passwords that meet the security criteria set by your company, and
confirm these.
—
Figure 50 Apply button

66 Installation Guide
Setting the date and time
To set the system date and time:
1 From the CoreSense M10 dashboard (see Figure 47), click Settings. The Settings page appears.
—
Figure 51 CoreSense M10 Settings page

2 Click Administration settings and enter your password (for more information on setting passwords,
see page 65).
3 In the Analyzer settings section of the Settings page, click the small calendar icon to the right of the
Analyzer date/time field. A calendar appears where you can select a date and enter the time.
—
Figure 52 Accessing the analyzer calendar

Configuring CoreSense M10 67

—
Figure 53 Setting the system date and time

4 Browse to select the appropriate date.

5 From the drop-down menus at the bottom of the calendar, select the appropriate time.
6 At the bottom of the page (depending on the size of your screen, you might have to scroll down),
click Apply to save the selected date and time.

68 Installation Guide
Activating the thermal pump
NOTICE
The thermal pump is designed to operate while immersed in transformer oil. It will fail
within minutes if operated in air.

For configuration purposes, the sensor head can be powered when it does not contain any oil. However,
the thermal pump must be turned OFF.
The CoreSense M10 sensor head is delivered with the thermal pump turned OFF. When installation is
complete and the sensor head is in contact with oil, make sure to activate the thermal pump.
To activate the thermal pump:
1 From the CoreSense M10 dashboard (see Figure 47), click Settings. The Settings page appears (see
page 67.
2 Click Administration settings and enter your password (for more information on setting passwords,
see Figure 51 on page 67).
3 Scroll down to the Application settings section and check the Enable thermal pump box.
4 At the bottom of the page, click Apply to confirm activation of the thermal pump.
—
Figure 54 Enabling the thermal pump

Configuring CoreSense M10 69

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—
C h a p te r 8

Maintenance and troubleshooting

The CoreSense™ M10 monitoring system does not require regular maintenance and does not contain
any field-serviceable parts. Fuses may need replacement if they have been submitted to an unusual
voltage event.
• In accordance with IEC61010-1 edition 3.0, to prevent contamination of the electronics by outside
elements, the analytical unit cabinet cover shall be opened only under controlled environmental
conditions defined as:
–– Temperature: between 5 °C (41 °F) and 40 °C (104 °F)
–– Maximum relative humidity: 80% for temperatures up to 31 °C (87 °F), decreasing linearly to 50%
relative humidity at 40 °C (104 °F).
• Do not expose the cabinet innards to unstable weather events (rain, snow, hail, etc.)
• Use only fuse(s) specified as appropriate for this equipment (see “Technical specifications” on
page 83).

Closing the analytical unit door

The CoreSense M10 analytical unit complies with the IP66 and NEMA 4X standards.
Before you close the door, it is important to verify that the screws holding the cable cover on the right-
hand side, and the screws holding the terminal block cover are tightened so as not to cause vibrations
when the unit is operational.
To ensure that the unit remains standards-compliant when you close the unit door, you must tighten
the unit latch screws to 9 N·m (80 lbf.in) by following the sequence indicated on page 61.

Cleaning the system

In accordance with your company’s procedure:
• Perform a visual inspection of the sensor head and analytical unit, checking for oil leaks, and water,
snow or sand accumulations. Wipe off any such accumulation with a clean cloth.
• Make sure that all enclosures and the connecting cable are properly secured.

Troubleshooting
Most problems that could happen within the CoreSense M10 monitoring system will be recorded as
events in the Events log. You will be informed of these problems either with alarms or by looking at the
LEDs on the system cabinet or sensor head. The meaning of the various LEDS is explained below.
Understanding cabinet LEDs
—
Figure 55 Analytical unit status LEDs

On the analytical unit cabinet, only one LED at a time can light up, as such:

Solid Blinking
RED An alarm threshold has been reached by any of N/A
the measured gases. For more information on
gas alarm thresholds, refer to the CoreSense
M10 User Guide.

ALARM
YELLOW A warning threshold has been reached by any of The operating system is booting up.
the measured gases. For more information on
gas warning thresholds, refer to the CoreSense
M10 User Guide.

WARNING
GREEN Normal operating conditions. The cabinet is starting up.

NORMAL
BLUE User attention is required as the sensor is either User attention is required as the last working
operating outside its nominal specifications pump or source is being used. An event is
or experimenting a fault condition. Consult the created accordingly and a service call should be
event log and contact ABB. made.
NOTE: The blinking blue LED can be lit at
MAINTENANCE the same time as other LEDs since the
unresponsive source/pump problem can
happen independently of other problems.

72 Installation Guide
Understanding sensor head LEDs
—
Figure 56 Sensor head status LEDs

System Gas Moisture

GREEN The sensor is powered up and All gas levels and rate-of- Both the moisture level
operating normally. change are below user- AND the moisture 24-hour
configured WARNING rate-of-change are below
thresholds. user-configured WARNING
thresholds.
BLUE Solid: User attention is N/A N/A
required as the sensor is either
operating outside its nominal
specifications or experimenting
a fault condition. Consult the
event log and contact ABB.

Blinking: User attention is

required as the last working
pump or source is being used. An
event is created accordingly and
a service call should be made.
YELLOW This indicator light will remain Gas level of at least one gas Moisture levels OR 24-hour
on while the CoreSense M10 OR 24-hour rate-of-change rate-of-change are above
is booting up. If the sensor of at least one gas is above user-configured WARNING
remains in warning mode for user-configured WARNING thresholds.
more than three minutes, thresholds. For more information on gas
WARNING the sensor requires user For more information on gas warning thresholds, refer to the
attention, or the thermal warning thresholds, refer to the CoreSense M10 User Guide.
pump is disabled or is being CoreSense M10 User Guide.
operated outside its nominal
specifications.
RED This indicates a sensor fault. Gas level of at least one gas Moisture levels OR 24-hour
Please consult event log and OR 24-hour rate-of-change of rate-of-change are above user-
contact ABB. at least one gas is above user- configured ALARM thresholds.
configured ALARM thresholds. For more information on gas
For more information on gas alarm thresholds, refer to the
ALARM alarm thresholds, refer to the CoreSense M10 User Guide.
CoreSense M10 User Guide.

Maintenance and troubleshooting 73

Exporting the Events log
Should you need to call ABB’s after-sales service (contact information on the back cover of this manual),
you will be asked to provide the event log file of your CoreSense M10. To provide this file, you need to
export it from the instrument.
To do so:
1 From the CoreSense M10 dashboard screen, click Events. The Events page appears.
—
Figure 57 Events page

2 In the drop-down menu located just above the DATE column, select the date range of your export
log.
–– Last day (24 hours)
–– Last week (7 days)
–– Last month (30 days)
–– Last year (12 months)
–– All data
–– Custom range
If you select Custom range, the From and To drop-down menus become active to allow you to select
a specific range of dates to include in the log.
The event table is updated upon selection of a range (predefined or custom).
3 Click Export.
At this point, you will be asked to specify what you want to do with the resulting .csv file, Regardless
of the browser in use, you will have the option to save the .csv file. By default, the file name will be
the date range for the event log that you are exporting. You can change it to your liking.
4 From the Save file dialog box that appears, select the location where you want to save of the events
log file.
This is the file that you will need to send to the ABB after-sales service.

74 Installation Guide
—
Figure 58 Saving the Events log file

Giving access to administrative settings on the SCADA port

If you enable access to the administrative settings on the SCADA port, all users logging into the system
with an operator password will not have access to the administrative settings.
To enable this feature:
1 From the CoreSense M10 dashboard (see Figure 47 on page 64), click Settings. The Settings page
appears (see Figure 51).
2 Click Administration settings and enter your password if necessary (for more information on
passwords, see “Modifying default passwords” on page 65).
3 In the Miscellaneous section, check the Enable admin settings on SCADA port.
—
Figure 59 Enabling remote access to ABB service personnel

4 At the bottom of the page, click Apply to save the information that you just entered.
From now on, operators accessing the system with the operator password will not have access to
administrative settings.

Maintenance and troubleshooting 75

Installing firmware updates
At some point in the future, you might be asked by ABB service representatives to update your system
firmware. This can be done with a web browser (remotely or locally) or a USB key (locally).
Before performing any firmware update, it is strongly recommended to export your system logs and
history files (refer to the LWT300 User Guide for more information on these procedures).

Updating with a web browser

To update the firmware via a web browser:
1 Skip to step 2 if you are working remotely. Otherwise, open the CoreSense M10 cabinet and connect
your laptop to an Ethernet communication port (SCADA or SERVICE) of the analytical unit with a
straight RJ45 Ethernet cable.
2 Open your web browser and point it to the required IP address:
–– if connected to the SCADA port: the static IP address (http://10.127.127.127) or the address
indicated on the local HMI;
–– if connected to the SERVICE port: http://10.126.126.126.
This address points to the CoreSense M10 dashboard.
3 From the CoreSense M10 dashboard, click Settings. The Settings page appears.
4 Click Update firmware and enter your password (if necessary). The firmware update page appears.
—
Figure 60 Firmware update page

5 Click Choose File.

6 In the Open window that appears, locate and select the firmware file (.zip) sent to you by the ABB
service representative.
7 Click Open. You return to the firmware update page. The name of the file that you selected appears
next to the Choose File button and the Update button is now active.
8 Click Update.
The file is uploaded to your system and the firmware update takes place.

NOTICE
Do not exit the browser during the firmware update process.

76 Installation Guide
—
Figure 61 Firmware update page

Your system reboots once the firmware is updated.

9 After the system has been automaticaly rebooted, return to the web page and click About
Coresense™ M10 to make sure that the application version is the one given to you by the ABB service
representative.

Updating with a USB key

NOTICE
If the update process do not seem to work on your first try, try it again with a different
brand of USB key or update remotely (see “Updating with a web browser” on page 76).

1 From your computer, extract the zip file sent to you by the ABB service representative at the root
level of a USB key.
2 Open the CoreSense M10 cabinet.
3 Shutdown the instrument using the main power switch.
—
Figure 62 Instrument main power switch

4 Insert the USB key on the USB port of the CoreSense M10 cabinet.

Maintenance and troubleshooting 77

—
Figure 63 Instrument USB port

5 Turn on the instrument using the main power switch (see Figure 4). The update process will start
automatically and take a few minutes.
Messages will appear on the local screen during the update process. Also, the instrument may
reboot two or three times depending on the required updates for your system. The update process
is complete once a message appears indicating to remove the USB key and reboot.
6 When this message appears, remove the USB key.
7 Power off the system for a few seconds and power it on again.
You may be asked to calibrate the screen by touching the 4 crosses displayed on the screen.
—
Figure 64 Screen calibration

The system firmware is considered complete after this last step. Wait until the Dashboard page is
displayed for at least 4 minutes (after the reboot, the Dashboard page might be empty for the first
20 minutes).

78 Installation Guide
Taking an oil sample
Occasionally, you might need to take an oil sample from the transformer to send to laboratories for
analysis. Oils samples are gathered from the sensor head.
To do take an oil sample:
1 Remove the external sampling port cover located on top of the sensor with the 4 mm hex key.

2 Connect the provided bleeding hose (ID 3.18 mm [0.125 in]) to the sampling adapter.
3 Direct the other end of the bleeding hose in an oil container to collect the sample.

Maintenance and troubleshooting 79

4 Loosen the bleed screw with the 4 mm hex key and wait until oil comes out of the sensor.

5 Once you have gathered enough sample oil, tighten the bleed screw to a maximum torque of
2.26 N·m (20 lbf.in).

NOTICE
Do not apply excessive torque.

6 Wipe excess oil with a clean cloth.

80 Installation Guide
7 Re-install the external sampling port cover and secure it with the 4 mm hex key.

Maintenance and troubleshooting 81

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C h a p te r 9

Technical specifications
The following pages indicate the CoreSense™ M10 technical specifications.

NOTICE
While the initial (cold start) accuracy of the sensor is likely to be within specifications, a
settling period of approximately 12 hours is strongly recommended to allow electronic
components to fully warm up and the internal temperature to stabilize.

Electrical specifications
Voltage input 100 to 240 V AC, single phase, 50 to 60 Hz
Line voltage fluctuation Not to exceed 10% of the nominal line voltage
Power consumption 600 VA
Maximum current 5.0 A
Sensor head 1 × 2.0 A/250 V (5 × 20 mm), slow-blow
Fuse type
Analytical unit 1 × 3.15 A/250 V (5 × 20 mm), slow-blow

Output circuits (alarm relays)

Kind of output 1 c/o (SPDT)
Rated operational voltage U₂ 250 V AC
(IEC/EN 60947-01)
Minimum switching voltage 5 V at 100 mA
Maximum switching voltage 400 V AC/250 V DC
Minimum switching current 10 mA at 10 V
Rated operational current
(IEC/EN 60947-5-1)
AC12 (resistive) 6A
AC15 (inductive) 1.5 A
AC15 (inductive) 3A
DC12 (resistive) 6A
DC13 (inductive) 1A
DC13 (inductive) 0.22 A
DC13 (inductive) 0.11 A
Maximum making (inrush) current 15 A, 240 V AC
Minimum switching power 10 mA at 10 V (AgSnO₂)
Maximum switching (breaking) power 1500 VA, 250 V AC
(AC1 [resistive])
Contact resistance 100 mΩ (at 1 A/6 V DC)
Rated insulation voltage 250 V AC

Rated impulse between coil and 4 kV 1 min

withstand contacts
voltage Uimp between open contacts 1 kV 1 min

Environmental specifications
Operating ambient temperature –50 °C to 55 °C (–58 °F to 131 °F)
Operating ambient humidity 5% to 95% RH, non-condensing
Shipping/storage temperature –40 °C to 70 °C (–40 °F to 158 °F)
Pollution degree 4 (outdoor use), 2 (internal)
Operating altitude –610 m to 2000 m (–2001 ft to 6562 ft)
Oil temperature at valve –20 °C to 120 °C (–4 °F to 248 °F)
Oil pressure at valve 0 to 1000 kPa/0 to 10 bar/0 to 145 psi

Mechanical specifications
Sensor head
Dimensions (L × W ×H) 392 × 264 × 158 mm (15.43 × 10.39 × 6.22 in)
Weight 8.0 kg (17.6 lb)
Interface to transformer 1.5 NPT, male thread
Enclosure IP67/NEMA 4X/C4
Analytical unit
Dimensions (with mount) (L × W ×H) 685 × 863 × 292 mm (26.76 × 33.97 × 11.49 in)
Weight 64.9 kg (143.3 lb)
Enclosure IP66/NEMA 4X

Measurement specifications
Hydrogen (H₂)
Range (ppm) 25 to 5,000
Accuracy (ppm) ±25 (or ±20%, whichever is higher)
Repeatability H₂ (ppm) ±15 (or ±10%, whichever is higher)
Response time T90 typical 30 minutes, T90 max 60 minutes

Moisture (H₂O)
Measurement range (aw) 0 to 1 (0 to 100% RH)
Measurement accuracy (aw) ±0.02 (±2% RH)
Range (ppm) 0 to 60 @ 25 °C (77 °F) or 0 to 180 @ 55 °C (131 °F) ±3%
Temperature measurement accuracy ±0.2 °C (±0.4 °F)

84 Installation Guide
Carbon Monoxide (CO)
Range (ppm) 2 to 5,000
Repeatability (%) ±5 (or ±LDL, whichever is greater)

Carbon Dioxide (CO₂)

Range (ppm) 5 to 20,000
Repeatability (%) ±5 (or ±LDL, whichever is greater)

Methane (CH₄)
Range (ppm) 1 to 10,000
Repeatability (%) ±5 (or ±LDL, whichever is greater)

Acetylene (C₂H₂)
Range (ppm) 0.5 to 10,000
Repeatability (%) ±5 (or ±LDL, whichever is greater)

Ethylene (C₂H₄)
Range (ppm) 2 to 10,000
Repeatability (%) ±5 (or ±LDL, whichever is greater)

Ethane (C₂H₆)
Range (ppm) 2 to 10,000
Repeatability (%) ±5 (or ±LDL, whichever is greater)

Propene (C₃H₆)
Range (ppm) 20 to 10,000
Repeatability (%) ±5 (or ±LDL, whichever is greater)

Propane (C₃H₈)
Range (ppm) 10 to 10,000
Repeatability (%) ±5 (or ±LDL, whichever is greater)

Laser
Type Solid state VCSEL
Wavelength 763 nm
Output 3 mW
Class 1

Technical specifications 85
Communication
Digital interfaces RS-485 serial port
2 × RJ45 100Base-T Ethernet ports
100base-FX fiber optic Ethernet port
USB port
Protocols Modbus RTU over RS-485 and Modbus TCP over Ethernet
DNP3 over RS-485 and Ethernet
IEC 61850 over Ethernet
Analog interfaces 4 dry-contact relays for alarms
8 analog 4–20 mA outputs for publishing values
4 analog 4–20 mA inputs for reading external sensors

86 Installation Guide
—
A p p endix A

Physical installation checklist

□□ The system date is set properly using the CoreSense™ M10 web interface.
□□ The thermal pump is enabled (see “Activating the thermal pump” on page 69). While the thermal
pump is disabled, the SYSTEM LED is yellow.
□□ Visual inspection of the installation (oil leaks).
□□ Cable glands are tight and secure.
□□ The sensor head and analytical unit are properly grounded.
□□ Teflon (PTFE) tape was applied on the 1.5 NPT fitting, as per “Installing the sensor head” on
page 35?
□□ The proper torque was applied to secure the eight bolts on the sensor head rotating flange, as
described in “Installing the sensor head” on page 35.
□□ The two bolts for the sensor head external sampling cover are secure.
□□ The five retaining screws of the CoreSense enclosure are properly secured.
□□ The SYSTEM, GAS, and MOISTURE LEDs are green at the back of the sensor head.
□□ The green LED is lit on the analysis unit.
□□ Dispose of any collected oil according to company regulations and local laws.
Page intentionally left blank
—
A p p endix B

Connector definitions
Inputs and outputs
NOTICE
You must use copper wires only. Using other types of conductors could damage the
instrument AND void the warranty.

—
Figure 65 Analytical unit communication ports

1 2 3 4 5 6 7 8

9 5 j 5 k

Connector Connection Type Wire Max. length Screwdriver

1 OPTICAL Optical Ethernet ST-ST full duplex 62.5/125 multi-mode 1220 m (4003 ft) n/a

2 SERVICE Ethernet Category 5 Straight 3 m (10 ft) n/a

3 SCADA Ethernet Category 5 Straight 100 m (328 ft) n/a

4 USB USB 2.0 A n/a n/a n/a

CASE 1. CASE Shield Stranded n/a Flat Ø 3.5 mm

5
2. CASE AWG #24 to AWG #16
WITH FERRULE
 Connector Connection Type Wire Max. length Screwdriver
RS485 1. TX+ RS-485 Stranded 1220 m (4003 ft) Flat Ø 3.5 mm
6
(SCADA) 2. TX– AWG #24 to AWG #16
3. RX– WITH FERRULE
4. RX+
5. RET
HU485 1. TX+ RS-485 Precabled 10 m (33 ft) Flat Ø 2.5 mm
7
2. TX–
3. RET
4. RX–
5. RX+
HU DC 1. +15V +15 V power supply Precabled 10 m (33 ft) Flat Ø 3.5 mm
8
POWER 2. +15V 3.15A
3. +15V
4. RET
5. RET
6. RET
4–20mA A08–. OUT8– 4–20 mA 24 V max. Stranded n/a Flat Ø 3.5 mm
9
OUTPUT A08+. OUT8+ AWG #24 to AWG #16
A07–. OUT7– WITH FERRULE
A07+. OUT7+
A06–. OUT6–
A06+. OUT6+
A05–. OUT5–
A05+. OUT5+
4–20mA A04–. OUT4– 4–20 mA 24 V max. Stranded n/a Flat Ø 3.5 mm
j
OUTPUT A04+. OUT4+ AWG #24 to AWG #16
A03–. OUT3– WITH FERRULE
A03+. OUT3+
A02–. OUT2–
A02+. OUT2+
A01–. OUT1–
A01+. OUT1+
4–20mA 1. IN4– 4–20 mA 24 V max. Stranded n/a Flat Ø 3.5 mm
k
INPUT 2. IN4+ AWG #24 to AWG #16
3. +24V WITH FERRULE
4. IN3–
5. IN3+
6. +24V
7. IN2+
8. IN2–
9. +24V
10. IN1–
11. IN1+
12. +24V

90 Installation Guide
Power and relays
—
Figure 66 Power and relay connections (front view)

BDF I J

ACE G H

14
11
12

Connector Connection Type Wire Screwdriver

14 - NO
Alarm 1
A Maintenance
11 - COM
12 - NC
14 - NO Copper only wire
Alarm 2
B System
11 - COM Stranded AWG #18
12 - NC WITH FERRULE
6 A/250 V AC Flat screwdriver Ø 3.5 mm
14 - NO OR
Alarm 3 Solid copper
C Warning
11 - COM
12 - NC AWG #18 to AWG #14

14 - NO
Alarm 4
D Alarm
11 - COM
12 - NC

 91
 Connector Connection Type Wire Screwdriver

E HU AC live
120–240 V AC Copper only wire
F HU AC neutral 50/60 Hz Stranded AWG #18 Flat screwdriver Ø 3.5 mm
3.15 A max. WITH FERRULE
G HU AC earth

Copper only wire

H AC earth Flat screwdriver Ø 3.5 mm
Stranded AWG #18
I AC live 120–240 V AC to AWG #12 WITH
50/60 Hz FERRULE
Flat screwdriver Ø 6 mm
8 A max. OR or Phillips #2
J AC neutral
Solid AWG #18 to
AWG #12

NOTICE
All terminals are properly identified in the instrument itself to simplify installation.

92 Installation Guide
—
ABB Inc.
Transformer Remanufacturing and Engineering Services (TRES)
1600, boulevard Lionel-Boulet
Varennes (Québec)
Canada J3X 1S4
Phone:
North America: 1 800 435-7365
Worldwide: +1 450 652 1500
E-mail:
contact.center@ca.abb.com
Fax:
+1 450 652-6467
www.abb.com/transformerservice

—
We reserve the right to make technical changes or modify the contents of
this document without prior notice. With regard to purchase orders, the
agreed particulars shall prevail. ABB does not accept any responsibility
whatsoever for potential errors or possible lack of information in this
document.
We reserve all rights in this document and in the subject matter and
1ZBG000041

illustrations contained therein. Any reproduction, disclosure to third

parties or utilization of its contents—in whole or in parts—is forbidden
without prior written consent from ABB.
© ABB, 2019