GE

Grid Solutions

MultilinTM 8 Series
745 to 845 Retrofit Kit

Instruction Manual
8 Series version: 2.9x
GE publication code: 1601-0726-A1

LISTED

*1601-0701-
Copyright © 2023 GE Multilin. All rights reserved.
Multilin 745 to 845 Retrofit Kit Instruction Manual.
Multilin 745 to 845 Retrofit Kit is a registered trademark of GE Multilin.
The contents of this manual are the property of GE Multilin. This documentation is
furnished on license and may not be reproduced in whole or in part without the permission
of GE Multilin.
Part numbers contained in this manual are subject to change without notice, and should
therefore be verified by GE Multilin before ordering.

Part number: 1601-0726-A1 (April 2023)

Disclaimer
It is the responsibility of the user to verify and validate the suitability of all GE Grid
Automation products. This equipment must be used within its design limits. The proper
application including the configuration and setting of this product to suit the power
system assets is the responsibility of the user, who is also required to ensure that all local or
regional safety guidelines are adhered to. Incorrect application of this product could risk
damage to property/the environment, personal injuries or fatalities and shall be the sole
responsibility of the person/entity applying and qualifying the product for use.
The content of this document has been developed to provide guidance to properly install,
configure and maintain this product for its intended applications. This guidance is not
intended to cover every possible contingency that may arise during commissioning,
operation, service, or maintenance activities. Should you encounter any circumstances not
clearly addressed in this document, please contact your local GE service site.
The information contained in this document is subject to change without notice.

IT IS THE SOLE RESPONSIBILITY OF THE USER TO SECURE THEIR NETWORK AND

ASSOCIATED DEVICES AGAINST CYBER SECURITY INTRUSIONS OR ATTACKS. GE GRID
AUTOMATION AND ITS AFFILIATES ARE NOT LIABLE FOR ANY DAMAGES AND/OR LOSSES
ARISING FROM OR RELATED TO SUCH SECURITY INTRUSION OR ATTACKS.

ii
For further assistance
For current manuals and software go to:
Website: http://www.gegridsolutions.com/multilin/ProductListing.htm

For product support, please use the following contact information:

GE Grid Solutions
650 Markland Street
Markham, Ontario
Canada L6C 0M1
Worldwide telephone: +1 905 927 7070
Europe/Middle East/Africa telephone: +34 94 485 88 54
North America toll-free: 1 800 547 8629
Fax: +1 905 927 5098
Worldwide e-mail: multilin.tech@ge.com
Europe e-mail: multilin.tech.euro@ge.com
Website: http://www.gegridsolutions.com/multilin

iii
 Safety words and definitions
The following symbols used in this document indicate the following conditions:

Indicates a hazardous situation which, if not avoided, will result in death or serious
Note

injury.

Indicates a hazardous situation which, if not avoided, could result in death or serious
Note

injury.

Indicates a hazardous situation which, if not avoided, could result in minor or

Note

moderate injury.

Indicates practices not related to personal injury.

Note

Indicates general information and practices, including operational information and

practices, that are not related to personal injury.
NOTE

General Cautions and Warnings

The following general safety precautions and warnings apply.

Disassembly of this unit will void the warranty. Do not attempt to open or repair the
Note

retrofit enclosure. All repairs are to be conducted by the factory.

Before attempting to use the equipment, it is important that all danger and caution
Note

indicators are reviewed.

If the equipment is used in a manner not specified by the manufacturer or functions
abnormally, proceed with caution. Otherwise, the protection provided by the
equipment may be impaired and can result in impaired operation and injury.

Hazardous voltages can cause shock, burns or death.

Note

Installation/service personnel must be familiar with general device test practices,

Note

electrical awareness and safety precautions must be followed.

Before performing visual inspections, tests, or periodic maintenance on this device or
associated circuits, isolate or disconnect all hazardous live circuits and sources of
electric power.
Failure to shut equipment off prior to removing the power connections could expose
you to dangerous voltages causing injury or death.
Ensure that all connections to the product are correct so as to avoid accidental risk of
shock and/or fire, for example from high voltage connected to low voltage terminals.
Follow the requirements of this manual, including adequate wiring size and type,
terminal torque settings, voltage, current magnitudes applied, and adequate isolation/
clearance in external wiring from high to low voltage circuits.
Use the device only for its intended purpose and application.

iv
 Ensure that all ground paths are un-compromised for safety purposes during device
operation and service.
All recommended equipment that should be grounded and must have a reliable and
un-compromised grounding path for safety purposes, protection against
electromagnetic interference and proper device operation.
Equipment grounds should be bonded together and connected to the facility’s main
ground system for primary power.
Keep all ground leads as short as possible.
In addition to the safety precautions mentioned all electrical connections made must
respect the applicable local jurisdiction electrical code.
It is recommended that a field external switch, circuit breaker be connected near the
equipment as a means of power disconnect. The external switch or circuit breaker is
selected in accordance with the power rating.
Ensure that the control power applied to the device, the AC current, and voltage input
match the ratings specified on the relay nameplate. Do not apply current or voltage in
excess of the specified limits.
Only qualified personnel are to operate the device. Such personnel must be thoroughly
familiar with all safety cautions and warnings in this manual and with applicable
country, regional, utility, and plant safety regulations.
Hazardous voltages can exist in the power supply and at the device connection to
current transformers, voltage transformers, control, and test circuit terminals. Make
sure all sources of such voltages are isolated prior to attempting work on the device.
Hazardous voltages can exist when opening the secondary circuits of live current
transformers. Make sure that current transformer secondary circuits are shorted out
before making or removing any connection to the current transformer (CT) input
terminals of the device.
For tests with secondary test equipment, ensure that no other sources of voltages or
currents are connected to such equipment and that trip and close commands to the
circuit breakers or other switching apparatus are isolated, unless this is required by
the test procedure and is specified by appropriate utility/plant procedure.
When the device is used to control primary equipment, such as circuit breakers,
isolators, and other switching apparatus, all control circuits from the device to the
primary equipment must be isolated while personnel are working on or around this
primary equipment to prevent any inadvertent command from this device.
Use an external disconnect to isolate the mains voltage supply.

To ensure the settings file inside the relay is updated, wait 30 seconds after a setpoint
Note

change before cycling power.

This product is rated to Class A emissions levels and is to be used in Utility, Substation
Note

Industrial environments. Not to be used near electronic devices rated for Class B levels.

v
vi
 Table of Contents
1: OVERVIEW INTRODUCTION ................................................................................................................................ 1
ORDERING ........................................................................................................................................... 2

2: CONVERTING DOWNLOADING & SAVING A 745 SETPOINT FILE ............................................................. 3

SETTINGS FILES CONVERTING A SAVED 745 SETPOINT FILE ......................................................................... 4
CONVERSION REPORT ................................................................................................................... 5
LOADING SETPOINTS FROM A FILE .......................................................................................... 6

3: REMOVING THE UNINSTALL THE 745 RELAY ......................................................................................................... 7

EXISTING RELAY

4: INSTALLING THE 8 DIMENSIONS ...................................................................................................................................... 10

SERIES RELAY MOUNTING THE 845 RETROFIT KIT .......................................................................................... 15

5: ELECTRICAL 745 TO 845 EQUIVALENT TERMINAL BLOCK MAPPINGS ............................................... 22

INSTALLATION 745 TO 845 SLOTS J&K: CT/VT CONNECTIONS .................................................................. 23
745 TO 845 SLOT A: CONTROL POWER AND GROUNDING ........................................... 27
745 TO 845 SLOT F, H .................................................................................................................... 28
745 TO 845 LOW VOLTAGE ANALOG I/O, TAP POSITION INPUT, RTD INPUT ....... 32

A: WARRANTY AND WARRANTY ......................................................................................................................................... 35

REVISION HISTORY REVISION HISTORY .......................................................................................................................... 35

MULTILIN 745 TO 845 RETROFIT KIT – INSTRUCTION MANUAL vii

MULTILIN 745 TO 845 RETROFIT KIT – INSTRUCTION MANUAL viii
GE
Grid Solutions

Multilin 745 to 845 Retrofit Kit

Chapter 1: Overview

Overview

1.1 Introduction
Traditionally, retrofitting or upgrading an existing relay has been a challenging and time
consuming task, often requiring re-engineering, panel modifications, and re-wiring. The
MultilinTM 745 to 845 Retrofit Kit provides a quick 3-step solution to upgrade previously
installed Multilin relays, reducing upgrade costs and minimizing effort.
The Retrofit Kit comes factory assembled and tested as a complete unit with the 845
protection relay. Optional replacement hardware is available (terminal blocks and screws)
for use if the existing hardware is significantly aged or damaged. A collar is provided to
ensure the depth of the existing and replacement relays match, eliminating the need to
push or pull cables.

A factory wired terminal block frame ensures

accurate mapping of existing terminal
locations to the 845 terminal block

A depth
reduction collar
eliminates the
Existing terminal blocks and
need to push or
wire labels plug directly in
pull cables

845 Protection Relay, mapped to

the existing 745 device

MULTILIN 745 TO 845 RETROFIT KIT – INSTRUCTION MANUAL 1

 ORDERING CHAPTER 1: OVERVIEW

The MultilinTM 745 to 845 Retrofit Kit can be installed in three general steps, as follows.
1. Convert the existing settings file - see Chapter 2 Converting Settings Files.
2. Uninstall the existing relay - see Chapter 3 Removing the Existing Relay.
3. Install the new Retrofit Kit - see Chapter 4 Installing the 8 Series Relay.

Detailed wiring equivalencies between the existing Multilin 745 relay and new Multilin 845
relay are shown in Chapter 5 Electrical Installation.

1.2 Ordering
Compatible 845 order codes for existing 745 relays can be obtained online from the
Multilin 845 product page.
1. Navigate to: www.gegridsolutions.com/multilin/catalog/845.htm
2. On the relay product page, click Buy 745 to 845 Retrofit Kit.
Check through the list of questions regarding feature availability carefully. 745
features not fully supported in the Multilin 745 to 845 Retrofit Kit are clearly identified.
Specifically, the following are not fully supported:
• Two-RS485 ports
• RS485 with a baud rate of 4800bps or lower
• More than 14 logic inputs
• A HI-voltage AC Power Supply with less than 88 V AC
• A LO-voltage AC Power Supply
• RS422 communications
If you require any of the features listed above, contact GE Grid Solution directly to
discuss your options. www.gegridsolutions.com/multilin/contact.htm?loc=3
3. Enter your existing SR 745 order code, and click Order Upgrade.
Order codes and available features for the Multilin 745 to 845 Retrofit Kit are shown.

Not all features are available in 8 Series Retrofit Kits. For a complete list of available
Note

845 features, look online at: www.gegridsolutions.com/multilin/catalog/845.htm

NOTE

2 MULTILIN 745 TO 845 RETROFIT KIT – INSTRUCTION MANUAL

GE
Grid Solutions

Multilin 745 to 845 Retrofit Kit

Chapter 2: Converting Settings

Files

Converting Settings Files

Before any mechanical or electrical changes are made, the settings file from the Multilin
745 relay must be backed up. The existing settings file can then be converted to an
8 Series settings file. All converted settings and new settings (set to default values) must be
carefully reviewed before the file is uploaded to the new 845 relay.

2.1 Downloading & Saving a 745 Setpoint File

In the EnerVista 745 Setup window, setpoint files are accessed in the Settings List control
bar window or the Files Window. Use the following procedure to download and save
setpoint files to a local PC.
1. Start version 4.0 of the EnerVista 745 Setup software.

Only 745 setpoint files from EnerVista 745 Setup version 4.0 are supported for
Note

conversion. Older file versions must be converted to version 4.0 using the latest
NOTE
EnerVista 745 setup software. To download the latest 745 setup software, see:
http://www.gegridsolutions.com/app/ViewFiles.aspx?prod=745&type=7
2. Ensure that the site and corresponding device(s) have been properly defined and
configured. (Refer to the 745 Instruction Manual for more information on the EnerVista
745 Setup software.)
3. Select the desired device from the site list.
4. Select File > Read Device Settings from the online menu item, or right-click on the
device and select Read Device Settings to obtain settings information from the
device.
5. After a few seconds of data retrieval, the software requests the name and destination
path of the setpoint file. The corresponding file extension is automatically assigned.
Press Receive to complete the process. A new entry is added to the tree, in the File
pane, showing path and file name for the setpoint file.
6. Note the location of the 745 setpoint file.

MULTILIN 745 TO 845 RETROFIT KIT – INSTRUCTION MANUAL 3

 CONVERTING A SAVED 745 SETPOINT FILE CHAPTER 2: CONVERTING SETTINGS FILES

2.2 Converting a Saved 745 Setpoint File

The EnerVista 8 Series Setup software creates new setpoint files based on an existing SR
745 setpoint file. The new file can be uploaded to a relay at a later date. The following
procedure illustrates how to convert existing 745 setpoint files.

Only 745 setpoint files from EnerVista 745 Setup version 4.0 are supported for conversion.
Note

NOTE
1. Install and start the latest version of the EnerVista 8 Series Setup software (available
from the GE Website). (See the 845 Instruction Manual for more information.)
2. In the Offline pane, right click and select the New Settings File item. The following box
appears, allowing for the configuration of the setpoint file for the correct firmware
version and relay order code.
It is important to define the correct firmware version and order code to ensure that
only available setpoints are downloaded into the relay.

3. Select the firmware Version, and Ordercode Options for the new setpoint file.
4. For future reference, enter some useful information in the Description box to facilitate
the identification of the device and the purpose of the file.
5. To select a file name and path for the new file, click the button beside the File Name
box.
6. Select the file name and path to store the file, or select any displayed file name to
replace an existing file. All 845 setpoint files should have the extension ‘.cid’ (for
example, ‘845 1.cid’).

File names for setting files cannot have a decimal point other than the one that is added in
Notehe one that is added in

front of CID.
NOTE
7. Click the box beside Initialize Settings from SR Settings File.

4 MULTILIN 745 TO 845 RETROFIT KIT – INSTRUCTION MANUAL

CHAPTER 2: CONVERTING SETTINGS FILES CONVERSION REPORT

8. To select an existing 745 file, click the button beside the Initialize Settings from SR
Settings File box and navigate to the file.
9. Click OK to complete the process. Once this step is completed, the new file, with a
complete path, is added to the 845 software environment. In addition a Conversion
Report is generated, as described in the following section.
For more information on the EnerVista 8 Series Setup software, refer to the
Multilin 845 Instruction Manual at:
http://www.gegridsolutions.com/app/ViewFiles.aspx?prod=845&type=3

2.3 Conversion Report

Once the file conversion process is complete, the conversion results are summarized in a
Conversion Report. The report is found under Device Definition in the Offline pane of the
EnerVista 8 Series Setup software.

The Conversion Report can be printed using the File/Print command in the EnerVista
taskbar or can be printed from the “GUI” print button.
• Save a copy of the Conversion Report immediately after the conversion, to use for
future reference. All Conversion Reports are removed and become inaccessible if the
user removes or modifies the converted file from the EnerVista 8 Series Setup
Software.
• Only settings converted from the original 745 setpoint file are shown in the Conversion
Report. All other settings available in the new 845 setpoint file are set to the default
value, and must be verified by the user before putting the relay into service.

The settings file conversion process is provisioned to reduce the effort of manually
Note

converting settings. This conversion process does not guarantee settings accuracy. Each
NOTE
successfully converted setting must be reviewed before putting the relay in service.
Settings in the Conversion Report window are linked to the appropriate settings screens.
Use the Conversion report window to navigate to the corresponding 845 settings window
to review converted settings.

MULTILIN 745 TO 845 RETROFIT KIT – INSTRUCTION MANUAL 5

LOADING SETPOINTS FROM A FILE CHAPTER 2: CONVERTING SETTINGS FILES

2.4 Loading Setpoints from a File

Once the converted settings file has been thoroughly reviewed, and the new 845 Relay
installed, the settings file can be uploaded to the 845 Relay.

An error message occurs when attempting to upload a setpoint file with a revision number
that does not match the relay firmware. If the firmware has been upgraded since saving
the setpoint file, see the 845 Instruction Manual for instructions on changing the revision
number of a setpoint file.
The following procedure illustrates how to load setpoints from a file.
1. Start the latest version of the EnerVista 8 Series Setup software.
2. Select the previously saved setpoints file from the File pane of the 845 software main
window.
3. Select the Offline > Edit Settings File Properties menu item and verify that the
corresponding file is fully compatible with the hardware and firmware version of the
target relay. If the versions are not identical, see Upgrading Setpoint Files to a New
Revision for details on changing the setpoints file version.
4. Right-click on the selected file and select the Write Settings File to Device item.
5. Select the target relay from the list of devices shown and click Send.
If there are no incompatibilities between the target device and the settings file, the data is
transferred to the relay. An indication of the percentage completed is shown in the bottom
of the main window.

6 MULTILIN 745 TO 845 RETROFIT KIT – INSTRUCTION MANUAL

GE
Grid Solutions

Multilin 745 to 845 Retrofit Kit

Chapter 3: Removing the Existing

Relay

Removing the Existing Relay

3.1 Uninstall the 745 Relay

Always be sure to follow your company's safety policies and procedures during the retrofit
Note

process.
NOTE

Wear appropriate personal protective equipment for hand and eye protection.
Note

Turn off control power before drawing out or re-inserting the relay to prevent
Note

maloperation.
1. Disconnect the Ethernet cable from the back of the 745 relay, and remove the relay
from its case.
2. From the back of the relay case, remove the terminal block screws. Do not remove
any wires.

Step 1 Step 2

MULTILIN 745 TO 845 RETROFIT KIT – INSTRUCTION MANUAL 7

UNINSTALL THE 745 RELAY CHAPTER 3: REMOVING THE EXISTING RELAY

3. Use a Phillips screwdriver or a sharp prying tool to pry open the metal sides of the
case around the terminal blocks. Use pliers to further pry open the case. This will
loosen the terminal blocks from the case.
A horizontal cutting tool may be used to cut slots on both sides of the terminal blocks
in the positions indicated, if required. Ensure not to damage any wires during this
process.

Step 3
4. Remove terminal blocks by pushing inwards, twisting sideways, and then pulling
outwards.

Step 4

5. Undo the tabs on the case around the cutout from the back.
6. Remove the empty 745 case.

Step 5 Step 6

8 MULTILIN 745 TO 845 RETROFIT KIT – INSTRUCTION MANUAL

GE
Grid Solutions

Multilin 745 to 845 Retrofit Kit

Chapter 4: Installing the 8 Series

Relay

Installing the 8 Series Relay

The following sections show the mechanical installation of the Multilin 745 to 845 Retrofit
Kit.

MULTILIN 745 TO 845 RETROFIT KIT – INSTRUCTION MANUAL 9

DIMENSIONS CHAPTER 4: INSTALLING THE 8 SERIES RELAY

4.1 Dimensions
The dimensions (in inches) of the Multilin 745 to 845 Retrofit Kit are shown, followed by
additional dimensions for mounting and panel cutouts.

Figure 4-1: Overall Dimensions - Top View

10 MULTILIN 745 TO 845 RETROFIT KIT – INSTRUCTION MANUAL

CHAPTER 4: INSTALLING THE 8 SERIES RELAY DIMENSIONS

8.68
REF

A A

B B
C C

D D

10.35
REF

E E

F F
G G

H H

Figure 4-2: Overall Dimensions - Back View

MULTILIN 745 TO 845 RETROFIT KIT – INSTRUCTION MANUAL 11

DIMENSIONS CHAPTER 4: INSTALLING THE 8 SERIES RELAY

Figure 4-3: Overall Dimensions - Side View

12 MULTILIN 745 TO 845 RETROFIT KIT – INSTRUCTION MANUAL

CHAPTER 4: INSTALLING THE 8 SERIES RELAY DIMENSIONS

Figure 4-4: Cutout Dimensions

MULTILIN 745 TO 845 RETROFIT KIT – INSTRUCTION MANUAL 13

 DIMENSIONS CHAPTER 4: INSTALLING THE 8 SERIES RELAY

8.50

7.71

7.25 (existing cutout)

11.00 9.00
(existing
cutout)

9.48 7.70

Figure 4-5: Drill Guide Template

14 MULTILIN 745 TO 845 RETROFIT KIT – INSTRUCTION MANUAL

CHAPTER 4: INSTALLING THE 8 SERIES RELAY MOUNTING THE 845 RETROFIT KIT

4.2 Mounting the 845 Retrofit Kit

With the retrofit kit, the draw-out and insertion mechanism remains the same. The depth
of the new terminal blocks is a close match to the depth of the 745 terminal blocks due to
the depth reduction collar included in the Retrofit Kit. There is no need to push or pull wires.
The 845 Retrofit Kit can be mounted using the following steps.
1. Use the template to mark holes for mounting the retrofit kit.
2. Drill or punch eight 0.21" diameter holes around the cutout border as shown in the drill
guide template.

Step 1 Step 2

3. Insert the retrofit kit in the cutout and secure it with the screws provided.
4. Insert the wired existing terminal blocks of 745 back on to the female terminal blocks
at the back of the retrofit kit case.

Step 3 Step 4

5. Secure the terminal blocks by screwing into place.

MULTILIN 745 TO 845 RETROFIT KIT – INSTRUCTION MANUAL 15

MOUNTING THE 845 RETROFIT KIT CHAPTER 4: INSTALLING THE 8 SERIES RELAY

6. Insert the new 845 relay inside the newly mounted Retrofit Kit case.

Step 5 Step 6

16 MULTILIN 745 TO 845 RETROFIT KIT – INSTRUCTION MANUAL

GE
Grid Solutions

Multilin 745 to 845 Retrofit Kit

Chapter 5: Electrical Installation

Electrical Installation

This chapter shows the electrical wiring diagram translations from Multilin 745 relays to
Multilin 845 relays.
For complete wiring diagrams for each relay, refer to the appropriate product Instruction
Manual available on our website: www.gegridsolutions.com/multilin

N/R = Not Required

N/A = Not Applicable

MULTILIN 745 TO 845 RETROFIT KIT – INSTRUCTION MANUAL 17

18
24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1

F
24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1

I/O
G
3 2 1
24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
PSU

H
18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1

J
16 14 12 10 8 6 4 2
15 13 11 9 7 5 3 1
B
I/O

18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1

BANK - J2
BANK - J1
C

10 9 8 7 6 5 4 3 2 1
BASIC

D
COMMS

PORT 1

AC ANALOG INPUTS
Rx5
Tx5
Rx4
Tx4

BANK - K2
BANK - K1
PORT 5
PORT 4
ADV

16 14 12 10 8 6 4 2
E
COMMS S

15 13 11 9 7 5 3 1

Figure 5-1: Rear Terminal Layout of the 8 Series Platform

ADV

PORT 5
PORT 4
CHAPTER 5: ELECTRICAL INSTALLATION

E
COMMS C

MULTILIN 745 TO 845 RETROFIT KIT – INSTRUCTION MANUAL

CHAPTER 5: ELECTRICAL INSTALLATION

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Figure 5-2: Rear Terminal Layout of the 745-845 Retrofit Kit

MULTILIN 745 TO 845 RETROFIT KIT – INSTRUCTION MANUAL 19

 CHAPTER 5: ELECTRICAL INSTALLATION

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20 MULTILIN 745 TO 845 RETROFIT KIT – INSTRUCTION MANUAL

CHAPTER 5: ELECTRICAL INSTALLATION

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MULTILIN 745 TO 845 RETROFIT KIT – INSTRUCTION MANUAL 21

745 TO 845 EQUIVALENT TERMINAL BLOCK MAPPINGS CHAPTER 5: ELECTRICAL INSTALLATION

5.1 745 to 845 Equivalent Terminal Block Mappings

Table 5–1: 745 Terminal Blocks

1 2 3 4 5 6 7 8 9 10 11 12
ANALOG ANALOG TAP TAP ANALOG ANALOG ANALOG ANALOG ANALOG ANALOG OUT ANALOG OUT ANALOG OUT
A INPUT + INPUT - POSITION + POSITION - OUT COM OUT 1 + OUT 2 + OUT 3 + OUT 4 + 5+ 6+ 7+
COM 1 COM 1 COM 1/2 COM 1 COM 1 COM 2 COM 2 RTD 1
B RS485 + RS485 - RS485 COM RS422 TX + RS422 TX - RS485 + RS485 - IRIG-B + IRIG-B - RTD 1 HOT RTD 1 COMP. RETURN
LOGIC LOGIC LOGIC LOGIC LOGIC LOGIC LOGIC LOGIC INPUT INPUT
C INPUT 9 + INPUT 10 + INPUT 11 + INPUT 12 + INPUT 13 + INPUT 14 + INPUT 15 + INPUT 16 + RESERVED RESERVED VT  VT
LOGIC LOGIC LOGIC LOGIC LOGIC LOGIC LOGIC LOGIC SETPOINT SETPOINT LOGIC POWER LOGIC POWER
D INPUT 1 + INPUT 2 + INPUT 3 + INPUT 4 + INPUT 5 + INPUT 6 + INPUT 7 + INPUT 8 + ACCESS + ACCESS - OUT + OUT COM

OUTPUT 1 OUTPUT 2 OUTPUT 3 OUTPUT 4 OUTPUT 5 OUTPUT 6 OUTPUT 6 OUTPUT 7 OUTPUT 8 OUTPUT 8 SELF TEST WINDING 2/3
E + NO NO NO NO NO NC COM NO NC COM GND CT
OUTPUT 1 OUTPUT 2 OUTPUT 3 OUTPUT 4 OUTPUT 5 OUTPUT 6 OUTPUT 7 OUTPUT 7 OUTPUT 8 SELF TEST SELF TEST WINDING 2/3
F - COM COM COM COM COM NO NC COM NO NC GND CT 
SAFETY
WINDING 1 WINDING 1 WINDING 1 WINDING 2 WINDING 2 WINDING 2 WINDING 3 WINDING 3 WINDING 3 WINDING 1/2 FILTER GROUND
G PHS A CT PHS B CT PHS C CT PHS A CT PHS B CT PHS C CT PHS A CT PHS B CT PHS C CT GND CT GROUND

H WINDING 1 WINDING 1 WINDING 1 WINDING 2 WINDING 2 WINDING 2 WINDING 3 WINDING 3 WINDING 3 WINDING 1/2 N CONTROL L CONTROL
PHS A CT  PHS B CT  PHS C CT  PHS A CT  PHS B CT  PHS C CT  PHS A CT  PHS B CT  PHS C CT  GND CT  - POWER + POWER

1 2 3 4 5 6 7 8 9 10 11 12

Table 5–2: 745 to 845 Terminal Block Mapping

1 2 3 4 5 6 7 8 9 10 11 12
A G10 G14 G16 G17 G8 G1 G2 G3 G4 G5 G6 G7
B D3 D4 D5 N/A N/A N/A N/A D1 D2 G19 G20 G21
C H14 H15 H16 H17 H18 H19 N/A N/A N/A N/A J9 J10
D F13 F14 F15 F16 F17 F18 F19 H13 N/A N/A F21, F20,
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H J1 J3 J5 K1 K3 K5 K9 K11 K13 J8 A2 A1
1 2 3 4 5 6 7 8 9 10 11 12

22 MULTILIN 745 TO 845 RETROFIT KIT – INSTRUCTION MANUAL

CHAPTER 5: ELECTRICAL INSTALLATION 745 TO 845 SLOTS J&K: CT/VT CONNECTIONS

5.2 745 to 845 SLOTS J&K: CT/VT Connections

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6/27- 6/27.

Figure 5-5: 745 and 845 CT Wiring - Two-Winding Transformer

MULTILIN 745 TO 845 RETROFIT KIT – INSTRUCTION MANUAL 23

 745 TO 845 SLOTS J&K: CT/VT CONNECTIONS CHAPTER 5: ELECTRICAL INSTALLATION

745

75$16)250(5
:%5($.(5 3+$6(&7V
:LQGLQJ

3+$6(&7V :%5($.(5
:LQGLQJ

3KDVH$

3KDVH%
:%5($.(5 3+$6(&7V
:LQGLQJ

3KDVH&

845

-------- ........ ........

,$ 1 ,% 1 ,& 1 ,* 1 ,$ 1 ,% 1 ,& 1 ,* 1 ,$ 1 ,% 1 ,& 1 ,* 1

3+$6($3+$6(%3+$6(& *5281' 3+$6($3+$6(%3+$6(& *5281' 3+$6($3+$6(%3+$6(& *5281'

&855(17,13876 &855(17,13876 &855(17,13876

6/27- 6/27.

Figure 5-6: 745 and 845 CT Wiring - Three-Winding Transformer

Table 5–3: VT Connections

Type System Connection 745 845
Voltages VT Input any winding, any phase C11 J9
Voltages VT Return any winding, any phase C12 J10

Set 845 SYSTEM > VOLTAGE SENSING > PHASE VT CONNECTION to “Single”.
Note

NOTE
Set 845 SYSTEM > VOLTAGE SENSING > PSEUDO VOLTAGE REFERENCE to match the 745
VOLTAGE INPUT PARAMETER setpoint (regardless of winding).

24 MULTILIN 745 TO 845 RETROFIT KIT – INSTRUCTION MANUAL

CHAPTER 5: ELECTRICAL INSTALLATION 745 TO 845 SLOTS J&K: CT/VT CONNECTIONS

Table 5–4: CT Connections

Type System Connection 745 845
Winding 1 - Phase A  H1 J1
Winding 1 - Phase A RETURN G1 J2
Winding 1 - Phase B  H2 J3
Winding 1 - Phase B RETURN G2 J4
Winding 1 - Phase C  H3 J5
Winding 1 - Phase C RETURN G3 J6
Winding 2 - Phase A  H4 K1
Winding 2 - Phase A RETURN G4 K2
Phase Current Winding 2 - Phase B  H5 K3
Inputs Winding 2 - Phase B RETURN G5 K4
Winding 2 - Phase C  H6 K5
Winding 2 - Phase C RETURN G6 K6
Winding 3 - Phase A  H7 K9
Winding 3 - Phase A RETURN G7 K10
Winding 3 - Phase B  H8 K11
Winding 3 - Phase B RETURN G8 K12
Winding 3 - Phase C  H9 K13
Winding 3 - Phase C RETURN G9 K14
For two-winding transformer:
Winding 1 - Ground 

For three-winding transformer: G10 J7

Winding # as assigned by 745
Ground CT Input setpoint for G1/2 -
Ground 
For two-winding transformer:
Winding 1 - Ground RETURN

For three-winding transformer: H10 J8

Winding # as assigned by 745
Ground CT Input setpoint for G1/2 -
Ground Current Ground RETURN
Inputs For two-winding transformer:
Winding 2 - Ground 

For three-winding transformer: E12 K7

Winding # as assigned by 745
Ground CT Input setpoint for G2/3 -
Ground 
For two-winding transformer:
Winding 2 - Ground RETURN

For three-winding transformer: F12 K8

Winding # as assigned by 745
Ground CT Input setpoint for G2/3 -
Ground RETURN

845 Ground Protection elements should be programmed to the signal input bank based on
Note

the 745 setpoints.

NOTE
*Restricted Ground Fault Element may not be able to be supported. TO BE DETERMINED BY
TESTING! MUST CONFIRM WITH TEST/APPS BEFORE DECIDING WHAT TO PUBLISH HERE.*

MULTILIN 745 TO 845 RETROFIT KIT – INSTRUCTION MANUAL 25

745 TO 845 SLOTS J&K: CT/VT CONNECTIONS CHAPTER 5: ELECTRICAL INSTALLATION

:,1',1*25
3KDVH$%RU&

745

& 97

,1387
97
& 97&20

Phase A

Phase B

Phase C

WYE VT
CONNECTION

845 C
A

J9 J10 J11 J12 J13 J14 J15 J16

VA VA VB VB VC VC VX VX

VOLTAGE INPUTS

Figure 5-7: 745 and 845 VT Connections

26 MULTILIN 745 TO 845 RETROFIT KIT – INSTRUCTION MANUAL

CHAPTER 5: ELECTRICAL INSTALLATION 745 TO 845 SLOT A: CONTROL POWER AND GROUNDING

5.3 745 to 845 Slot A: Control Power and Grounding

745

845

Figure 5-8: Control Power and Grounding

Table 5–5: Control Power and Grounding

Type Function 745 845
Power Supply Plus H12 A1
Power Supply Negative H11 A2
Power Supply Ground G11/G12 A3

MULTILIN 745 TO 845 RETROFIT KIT – INSTRUCTION MANUAL 27

 745 TO 845 SLOT F, H CHAPTER 5: ELECTRICAL INSTALLATION

5.4 745 to 845 Slot F, H

5.4.1 HV I/O - Contact Outputs

745 845

75,3
62/,'67$7(
 (
  )
75,3 (
 )
75,3 (
 )
75,3 (
 )
287387&,5&8,76

75,3 (
 )
(
$8;,/,$5<
 )
(
(
$8;,/,$5<
 (
)
(
$8;,/,$5<
 )
(
)
6(/)7(67 (
)

Figure 5-9: 745-845 Contact Output Mapping

Trip and close coil supervision is not available.

Note

NOTE

28 MULTILIN 745 TO 845 RETROFIT KIT – INSTRUCTION MANUAL

CHAPTER 5: ELECTRICAL INSTALLATION 745 TO 845 SLOT F, H

Table 5–6: Contact Outputs

745 Function 845 Function 745 845
Output 1: solid state trip (+) Auxiliary 12 NO E1 H12
Output 1: solid state trip (-) Auxiliary 12 Common F1 H11
Output 2: trip relay (NO) Auxiliary 1 NO E2 H22
Output 2: trip relay (common) Auxiliary 1 Common F2 F9
Output 3: trip relay (NO) Auxiliary 2 NO E3 F8
Output 3: trip relay (common) Auxiliary 2 Common F3 F7
Output 4: trip relay (NO) Auxiliary 9 NO E4 F12
Output 4: trip relay (common) Auxiliary 9 Common F4 F11
Output 5: trip relay (NO) Auxiliary 10 NO E5 F10
Output 5: trip relay (common) Auxiliary 10 Common F5 H9
Output 6: auxiliary relay (NO) Auxiliary 3 NO E6 H8
Output 6: auxiliary relay (common) Auxiliary 3 Common F6 H7
Output 6: auxiliary relay (NC) Auxiliary 3 NC E7 H12
Output 7: auxiliary relay (NO) Auxiliary 4 NO F8 H11
Output 7: auxiliary relay (common) Auxiliary 4 Common E8 H10
Output 7: auxiliary relay (NC) Auxiliary 4 NC F8 F24
Output 8: auxiliary relay (NO) Auxiliary 11 NO E9 F23
Output 8: auxiliary relay (common) Auxiliary 11 Common F9 F22
Output 8: auxiliary relay (NC) Auxiliary 11 NC E10 H7
Output 9: service relay (NO) Critical Failure 8 NO F10 F24
Output 9: service relay (common) Critical Failure 8 Common E11 F23
Output 9: service relay (NC) Critical Failure 8 NC F11 F22

MULTILIN 745 TO 845 RETROFIT KIT – INSTRUCTION MANUAL 29

745 TO 845 SLOT F, H CHAPTER 5: ELECTRICAL INSTALLATION

5.4.2 HV I/O - Contact Inputs

745 845

/2*,&,1387 '
/2*,&,1387 '
/2*,&,1387 '
/2*,&,1387 '
/2*,&,1387 '
/2*,&,1387 '
/2*,&,1387 '
/2*,&,1387 '
6(732,17  '
$&&(66  '
/2*,&32:(5287  '
/2*,&32:(5287 &20 '
/2*,&,1387 &
/2*,&,1387 &
/2*,&,1387 &
/2*,&,1387 &
/2*,&,1387 &
/2*,&,1387 &
/2*,&,1387 &
/2*,&,1387 &

Figure 5-10: 745-845 Contact Input Mapping

Table 5–7: Contact Inputs

System Connection 745 845
Logic Input 1 D1 F13
Logic Input 2 D2 F14
Logic Input 3 D3 F15
Logic Input 4 D4 F16
Logic Input 5 D5 F17
Logic Input 6 D6 F18
Logic Input 7 D7 F19
Logic Input 8 D8 H13
Logic Input 9 C1 H14
Logic Input 10 C2 H15
Logic Input 11 C3 H6
Logic Input 12 C4 H17
Logic Input 13 C5 H18
Logic Input 14 C6 H19
Logic Input 15 C7 Not supported
Logic Input 16 C8 Not supported

30 MULTILIN 745 TO 845 RETROFIT KIT – INSTRUCTION MANUAL

CHAPTER 5: ELECTRICAL INSTALLATION 745 TO 845 SLOT F, H

Table 5–7: Contact Inputs

System Connection 745 845
Logic Power Out (Dry) (+) D11 F21, H21
Logic Power Out (Wet) (COM) D12 F20, H20
Setpoint Access (+) D9 Not supported - see Note
Setpoint Access (-) D10 Not supported - see Note

• Setpoint Access can be configured to one of the available 845 Contact Inputs.
Note

• Inputs 1 through 7 must use the same input signal (wet or dry).
NOTE
• Inputs 8 through 14 must use the same input signal (wet or dry).
• For slots that will use dry input signals, set the contact input voltage threshold to
17Vdc.

MULTILIN 745 TO 845 RETROFIT KIT – INSTRUCTION MANUAL 31

745 TO 845 LOW VOLTAGE ANALOG I/O, TAP POSITION INPUT, RTD INPUT CHAPTER 5: ELECTRICAL INSTALLATION

5.5 745 to 845 Low Voltage Analog I/O, Tap Position

Input, RTD Input
E>K' KE>KdW
E>K'KhdWhd^ Zd
/EWhd ,E'Z
745 н Ͳ н Ͳ KD ϭн Ϯн ϯн ϰн ϱн ϲн ϳн ,Kd KDW Zd
ϭ Ϯ ϯ ϰ ϱ ϲ ϳ ϴ ϵ ϭϬ ϭϭ ϭϮ ϭϬ ϭϭ ϭϮ

'ϭ 'Ϯ 'ϯ 'ϰ 'ϱ 'ϲ 'ϳ 'ϴ 'ϵ 'ϭϬ 'ϭϭ 'ϭϮ 'ϭϯ 'ϭϰ 'ϭϱ 'ϭϲ 'ϭϳ 'ϭϴ 'ϭϵ 'ϮϬ 'Ϯϭ 'ϮϮ
н н н н н н н ϭ Ϯ ϯ ϰ
Zd ^,> Zd ^,> н Ͳ ^,> ,Kd KDW Zd ^,>
845 ϭ Ϯ ϯ ϰ ϱ ϲ ϳ н н н н
E>K'KhdWhd E>K'/EWhd K,D^/EWhd Zd

Figure 5-11: 745-845 Low Voltage Analog I/O, Tap Position Input, RTD Input Mapping

Table 5–8: Low Voltage Inputs and Outputs

Type System Connection 745 845
Analog Input Analog Input 1+ A1 G10
Analog Input Analog Input Common - A2 G14
Analog Output Analog Output 1+ A6 G1
Analog Output Analog Output 2+ A7 G2
Analog Output Analog Output 3+ A8 G3
Analog Output Analog Output 4+ A9 G4
Analog Output Analog Output 5+ A10 G5
Analog Output Analog Output 6+ A11 G6
Analog Output Analog Output 7+ A12 G7
Analog Output Analog Output Common - A5 G8
Tap Position Input Tap Position + A3 G16
Tap Position Input Tap Position - A4 G17
RTD Input RTD Hot B10 G19
RTD Input RTD Compensation B11 G20
RTD Input RTD Return B12 G21

32 MULTILIN 745 TO 845 RETROFIT KIT – INSTRUCTION MANUAL

CHAPTER 5: ELECTRICAL INSTALLATION 745 TO 845 LOW VOLTAGE ANALOG I/O, TAP POSITION INPUT, RTD INPUT

745 845

н ϭ ϯ н
Z^ϰϴϱ Ͳ Ϯ ϰ Ͳ Z^ϰϴϱ
KDϭ KD ϯ ϱ KD
ddžн ϰ
Z^ϰϮϮ
ddžͲ ϱ
н ϲ
KDϮ Z^ϰϴϱ
Ͳ ϳ

н ϴ ϭ н
/Z/'Ͳ /Z/'Ͳ
Ͳ ϵ Ϯ Ͳ
Figure 5-12: 745-845 Communications

Table 5–9: Communications

System Connection 745 845
Computer RS485 (+) / RS422 (Rx+) B1 D3
Computer RS485 (-) / RS422 (Rx-) B2 D4
Computer RS485/RS422 (common) B3 D5
RS422 (Tx+) B4 Not supported
RS422 (Tx-) B5 Not supported
External RS485 (+) B6 Not supported
External RS485 (-) B7 Not supported
IRIG-B + B8 D1
IRIG-B - B9 D2

845 supports the Computer RS485 mode, not the 4-wire RS422 mode.
Note

NOTE
Converting the External RS485 channel to Ethernet using Multinet is recommended.

MULTILIN 745 TO 845 RETROFIT KIT – INSTRUCTION MANUAL 33

745 TO 845 LOW VOLTAGE ANALOG I/O, TAP POSITION INPUT, RTD INPUT CHAPTER 5: ELECTRICAL INSTALLATION

34 MULTILIN 745 TO 845 RETROFIT KIT – INSTRUCTION MANUAL

GE
Grid Solutions

Multilin 745 to 845 Retrofit Kit

Appendix A: Warranty and

Revision History

Warranty and Revision History

This Appendix includes the warranty and revision history.

Warranty
For products shipped as of 1 October 2013, GE warrants most of its GE manufactured
products for 10 years. For warranty details including any limitations and disclaimers, see
our Terms and Conditions at https://www.gegridsolutions.com/multilin/warranty.htm
For products shipped before 1 October 2013, the standard 24-month warranty applies.

Revision history

Table A-1: Revision History

MANUAL P/N RELEASE DATE
1601-0726-A1 April 2023

MULTILIN 745 TO 845 RETROFIT KIT – INSTRUCTION MANUAL 35

REVISION HISTORY CHAPTER A: WARRANTY AND REVISION HISTORY

36 MULTILIN 745 TO 845 RETROFIT KIT – INSTRUCTION MANUAL