10

WORLDWIDE

Multilin 850 YEAR

WARRANTY

Innovative Feeder Protection System for

Industrial and Utility Feeder Applications Innovative Technology
The Multilin™ 850 relay is a member of the Multilin 8 Series protective relay platform and has been & Design
designed for the management, protection and control of feeder applications. The Multilin 850 is used • Advanced feeder protection, control and
to provide primary (main) or backup protection for underground and overhead feeders for utility and diagnostics capability
industrial power networks. • Patented environmental monitoring and
diagnostics
Designed with advanced communications options and detailed asset monitoring capabilities, the
Multilin 850 provides advanced functionality, including high-performance protection, extensive • Advanced, flexible and embedded
communications: IEC® 61850 Ed2,
programmable logic and flexible configuration capabilities. With support for industry leading
IEC 62439/PRP, Modbus® RTU & TCP/IP,
communications protocols and technologies, the 850 provides easy integration into new or existing
DNP3.0, IEC 60870-5-104
SCADA or DCS for enhanced situational awareness.
• Single setup and configuration across
the platform
Key Benefits
• Elimination of electrolytic capacitors
• Advanced logic and configuration flexibility to provide comprehensive primary or backup protection
of overhead or underground cables • Field swappable power supply

• Advanced breaker diagnostics with high-end fault and disturbance recording • Enhanced relay draw-out construction

• Integrated arc flash detection using light sensors supervised by over current to reduce incident
energy and equipment damage Exceptional Quality
• High-end cyber security such as AAA, Radius, RBAC, and Syslog enabling NERC® CIP requirements
• Draw-out design simplifies testing, commissioning and maintenance, thereby increasing process
& Reliability
uptime • IPC A-610-E Class 3 manufacturing standards

• Optional Wi-Fi connectivity minimizes system configuration and provides safe relay programming • Highest reliability standards for electronics
and diagnostic retrieval testing

• Relay environmental diagnostic information helps reduce system downtime • 100% Environmental Stress Screening and full
functional testing

Applications • Rated for IP54 (front) applications

• Wide range of feeder applications for utility, oil & gas, mining & metals, process industry, commercial, • Standard Harsh Conformal Coating
and water wastewater
• Comprehensive protection and management of incoming and outgoing feeders Uncompromising
• Fast protection pass enables use for load shedding schemes
• Advanced communications and flexlogic for reliable automatic bus transfer schemes
Service & Support
• Covered under GE’s 10 year warranty plan
• High speed fault detection for arc flash mitigation
• Designed, tested and assembled by GE
850 Feeder Protection System

Multilin 8 Series Platform Overview

From oil pumping and refining facilities, to open pit or underground mining The Multilin 8 Series is GE’s next-generation protection and control relay
and processing operations, to large or small utilities, customers demand platform provides comprehensive protection and asset monitoring for critical
solutions that ensure maximum process uptime, minimum operational feeders, motors, generators, and transformers.
and maintenance efforts, and have the durability to withstand harsh
environmental conditions.

Multilin 8 Series Platform - Application Example

2 GEDigitalEnergy.com
 850 Feeder Protection System

The Multilin 8 Series is designed to solve the challenges that customers face in With advanced communications the Multilin 8 Series integrates easily and
running their day-to-day operations including maximizing system and process seamlessly into new or existing DCS/SCADA system, along with other Multilin
uptime, simplifying system integration and maintenance, and extending protection devices, providing a comprehensive solution for the end-to-end
the life of critical assets. Utilizing advanced design practices (IPC A-610 electrical system within the operations.
standards), superior technology (elimination of all electrolytic capacitors), and
state-of-the art test and manufacturing facilities (every device endures 100%
Environmental Stress Screening), GE is raising the bar on system performance
and reliability.

GEDigitalEnergy.com 3
850 Feeder Protection System

Exceptional Quality & Reliability The Multilin 8 Series products have an integrated protection integrity engine
that utilizes customized algorithms, providing advanced diagnostics to ensure
Industry-leading quality, reliability and design processes are at the core of
asset protection is not compromised.
GE’s next generation protective relay platform. With significant investments in
state-of-the-art type test facilities that simulate a complete range of operating Maintaining and safeguarding the electrical supply of an operation is critical
environments and designed to the IPC A-610 Class 3 standard, adhering to the to ensuring maximum process availability and performance.
highest reliability standards and ensuring rugged performance, each device
The 8 Series incorporates the latest cyber security features, including
completes one hundred percent Electrical Stress Screening prior to shipping
password complexity, RADIUS authentication, role-based access control
from GE’s facility.
(RBAC), customers to comply with NERC CIP and NISTIR 7628 requirements.
The Multilin 8 Series Protection Relays are manufactured in an ISO® 9001:2008
Understanding that customers need protection and control devices that
certified manufacturing facility.
must reliably operate in extremely harsh and challenging environments, GE
delivers the Multilin 850 with harsh conformal coating on all printed circuit
Pioneering Technology & Design boards and a patented environmental awareness module that provides real-
time detection of environmental factors that affect product life, as part of its
The Multilin 850 is part of the 8 Series platform that provides comprehensive,
standard offering, delivering higher reliability and extended relay life.
high performance protection and control for critical assets in Industrial and
utility environment.

For main-tie-main configurations, the Multilin 850 delivers a more

Uncompromised Service and Support
economical and reliable solution, enabling customers to reduce hardware In addition to the superior technology and innovative design advancements
requirements and simplify device integration, including safe and secure Wi-Fi that enable delivery of uncompromised performance and reliability, the
communications for system configuration and diagnostics. Multilin 8 Series is also backed by GE’s 10 year warranty plan.

Utilizing decades of experience, GE has implemented ease-of-use features,

such as single screen set-ups delivering faster feeder configuration,
configurable scheme logic that eliminates the need for complex end-user
programming, driving quicker setup times, decreased implementation costs
and reduced points of failure.

1 2

3 4 5

1 Field Swappable Power Supply 4 IPC A-610 Class 3 Manufacturing

Extends the usable life of the protection relay and minimizes Drives to the highest level of reliability standards delivering
costly, time consuming replacement and re-configuration. rugged performance

2 Harsh Environment Conformal Coating

Standard on all printed circuit boards delivering higher reliability
5 Robust Extruded Aluminum Chassis
Custom-designed extruded aluminum chassis delivering
and extended relay life optimal operating performance

3 No Electrolytic Capacitors 6 Draw-Out

Increasing quality and reliability for continuous plant operations Providing simplified device fleet management
by removing high failure components

4 GEDigitalEnergy.com
 850 Feeder Protection System

Multilin 850 Overview RTD Protection

The Multilin 850 feeder Protection System is a protection device designed for The Multilin 850 supports up to 13 programmable RTD inputs that can be
the management, protection and control of incoming and outgoing feeders. configured for an Alarm or Trip.
The 850 provides comprehensive protection and control for these various The RTDs can be assigned to a group for monitoring ambient temperatures
feeders. or any other desired temperature. The RTD voting option gives additional
The 850 relay offers the ideal solution for protecting, monitoring and reliability to ignore any RTD failures.
controlling feeders from disturbances or faults. With a fast protection pass,
running every 2 msec, the 850 relay provides faster response to current, Integrated Arc Flash Protection
voltage, power, and frequency protection elements. Supporting the latest in
The Multilin 8 Series supports an integrated arc flash module providing
industry standard communication protocols, including IEC 62439/PRP and IEC
constant monitoring of an arc flash condition within the switchgear, motor
61850, the Multilin 850 relay easily integrates into new or existing networks.
control control centers, or panelboards. With a 2ms protection pass, the 8
The 850 is an advanced feeder protection relay that provides high Series is able to detect light and overcurrent using 4 arc sensors connected
performance protection, extensive programmable logic and flexible to the 8 Series relay. In situations where an arc flash/fault does occur,
configuration capabilities. With protection and control logic, the 850 allows the relay is able to quickly identify the fault and issue a trip command to
for simplified coordination with upstream and downstream disconnect the associated breaker thereby reducing the total incident energy and
devices. This advanced protection relay also offers enhanced features, such minimizing resulting equipment damage.
as diagnostics, preventative maintenance, condition monitoring, security, and
Self-monitoring and diagnostics of the sensors ensures the health of the
advanced communications options.
sensors as well as the full length fiber cables. LEDs on the front panel display
of the 845 can be configured to indicate the health of the sensors and its
Protection & Control connections to the relay.
As part of the 8 Series family, the Multilin 850 provides superior protection
and control. The 850 offers comprehensive protection and control solutions
for incoming, outgoing bus-tie/bus-coupler feeders. It contains a full range of
selectively enabled, self contained protection and control elements.

• Phase/Neutral/Ground Time Overcurrent (51P/N/G)

• Phase/Neutral/Ground Instantaneous Overcurrent (50P/N/G)
• Phase Directional Overcurrent (67P)
• Directional Power (32)
• Phase/Aux Under Voltage (27P/X)
• Phase/Neutral/Aux Over Voltage (59P/N/X)
• Over/Under/ROC Frequency (81O/U)
• Synchrocheck (25)
• Autoreclose (79)
MV Switchgear or Motor Control Center Multilin 8 Series
• AR Current Supervision And AR Zone Coordination
Fast, reliable arc flash protection with light-based arc flash sensors integrated
The voltage and frequency protection functions detect abnormal system within the Multilin 8 Series of protection & control devices. With arc flash
conditions, potentially hazardous to the system. Some of these conditions may detection in as fast as 2msec, the costs associated with equipment damage
consist of over and undervoltage, over and underfrequency, and phase reversal. and unplanned downtime is significantly reduced.

Fast Underfrequency Analog Inputs, Analog Outputs

The 850 has an 8 stage Fast Underfrequency element that measures The 850 provides 7 Analog Outputs (dc mA), 4 Analog Inputs (dc mA), 1 RTD
frequency by detecting the consecutive voltage zero crossings and measuring input. The configurable analog inputs can be used to measure quantities fed
the time between them. The measured frequency has the range between 20 to the relay from standard transducers. Each input can be individually set to
to 70 Hz. This is useful for performing fast loadshedding when frequency measure 4-20 mA, 0-20 mA or 0-1 mA transducer signals.
variations from unbalance conditions arise due to:
The 850 can also be set to issue trip or alarm commands based on signal
• Inadequate load forecast or deficient generation capacity programming. thresholds. The configurable analog outputs
• Busbars, generator group or interconnection feeders trip.
can be used to provide standard transducer signals to local monitoring
• System splits into islands. equipment. The analog outputs can be configured to provide outputs based
on measured analog values, or calculated quantities.
FlexCurves™ An optional general purpose transducer input allows a user-defined quantity
For applications that require greater flexibility, FlexCurves can be used to to be monitored and used as part of the protection as defined by FlexLogic™.
define custom curve shapes. These curves can be used to coordinate with
other feeders to achieve fault selectivity.

GEDigitalEnergy.com 5
850 Feeder Protection System

Advanced Automation Environmental Monitoring

The 850 implements a patented environmental monitoring system that
The Multilin 850 incorporates advanced automation capabilities that
measures and provides operating condition information. Reliable and secure
exceeds what is found in most feeder protection relay. This reduces the
operation of the 850 relay and other electronic devices in the vicinity may be
need for additional programmable controllers or discrete control relays
affected by environmental factors. The 850 relay has been designed to meet
including programmable logic, communication, and SCADA devices.
or exceed all required industry standards, however some operating conditions
Advanced automation also enables seamless integration of the 850 into
may be beyond those standards and reduce total lifespan of the device.
other protection or process systems (SCADA or DCS).
Typical environmental conditions that may affect electronic device
FlexLogic reliability include voltage, current density, temperature, humidity, gas, dust,
FlexLogic is the powerful programming logic engine that provides the ability contamination, mechanical stress, shock, radiation, and intensity of electrical
to create customized protection and control schemes, minimizing the need and magnetic fields. These environmental factors are different from natural
and associated costs of auxiliary components and wiring. Using FlexLogic, weather conditions at particular installation conditions and are beneficial to
the 850 can be programmed to provide the required tripping logic along monitor. The 850 relay’s built-in environmental awareness feature (patent
with custom scheme logic for feeder control interlocking schemes with “Systems and methods for predicting maintenance of intelligent electronic
adjacent protections (for example, preventing sympathetic tripping of devices”) collects the histograms of each operating condition from the
healthy feeders), and dynamic setting group changes. point the device is put into service. Monitored environmental conditions
include temperature, humidity and transient voltage. The histogram of each
Monitoring & Diagnostics environmental factor may be retrieved from the diagnostic page accessed
The Multilin 850 includes high accuracy metering and recording for all AC through a PC running the EnerVista Multilin 8 Series Setup program.
signals. Voltage, current, and power metering are built into the relay as a
standard feature. Current and voltage parameters are available as total RMS
magnitude, and as fundamental frequency magnitude and angle.

Breaker Health Monitoring

The breaker is monitored by the relay not only for detection of breaker
failure, but also for the overall “breaker health” which includes:

• Breaker close and breaker open times

• Trip circuit monitoring
• Spring charging time
• Per-phase arcing current
• Trip counters
All algorithms provide the user with the flexibility to set up initial breaker trip
counter conditions and define the criteria for breaker wear throughout a
number of set points.

Environmental health report is available via Multilin PC Software

Multilin 8 Series Breaker Health Report available on display

or via the setup software

6 GEDigitalEnergy.com
 850 Feeder Protection System

Metering
The Multilin 850 offers high accuracy power quality monitoring for fault and
system disturbance analysis. The Multilin 8 Series delivers unmatched power
system analytics through the following advanced features and monitoring
and recording tools:

• Harmonics measurement up to 25th harmonic for both currents and

voltages including THD.
• The length of the transient recorder record ranges from 31 cycles to 1549
cycles, depending on the user specified configuration. - - This gives the
user ability to capture long disturbance records which is critical for some
applications.
• 32 digital points and 16 analog values, assigned by the user, can be
captured in the COMTRADE format by the transient recorder.
Multilin 850 Phasor viewer
• Comprehensive data logger provides the recording of 16 analog values
selected from any analog values calculated by the relay. Capture rates
range from 16 ms, 20ms, 1 second, 30 seconds, 1 minute, 30 minutes, or
1 hour rate. This data capture flexibility allows the operator to measure
power factor or reactive power flow (for example), for several hours or
even days, enabling detailed analysis and corrective action to be taken,
if required.
• Detailed Fault Report allows the user to identify the fault location, fault
type and element(s) that triggered the 850 to trip. It carries other useful
information, such as pre-fault and fault phasors, relay name and model,
firmware revision and other details. The 850 stores fault reports for the
last 16 events. 1024 Event Recorder chronologically lists all triggered
elements with an accurate time stamp over a long period of time. The 850
stores the last 1024 events locally in the relay.

The 850 monitoring system performance with oscillography and event records

Multilin 850 Event Recorder

The 850 monitoring system performance with harmonic analysis

GEDigitalEnergy.com 7
850 Feeder Protection System

Communications Cyber Security

The 850 provides advanced communications technologies for remote data The 850 cyber security enables the device to deliver full cyber security features
and engineering access, making it easy and flexible to use and integrate that help operators to comply with NERC CIP guidelines and regulations.
into new and existing infrastructures. Direct support for fiber optic Ethernet
provides high-bandwidth communications, allowing for low-latency controls AAA Server Support (Radius/LDAP)
and high-speed file transfers of relay fault and event record information. The Enables integration with centrally managed authentication and accounting
850 also supports two independent IP addresses, providing high flexibility of all user activities and uses modern industry best practices and standards
for the most challenging of communication networks. that meet and exceed NERC CIP requirements for authentication and
Providing several Ethernet and serial port options and supporting a password management.
wide range of industry standard protocols, the 850 enables easy, direct
Role Based Access Control (RBAC)
integration into DCS and SCADA systems. The 850 supports the following
protocols: Efficiently administrate users and roles within UR devices. The new and
advanced access functions allow users to configure up to five roles for up to
• IEC 61850, IEC 62439 / PRP
eight configurable users with independent passwords. The standard “Remote
• DNP 3.0 serial, DNP 3.0 TCP/IP,, IEC 60870-5-103, IEC 60870-5-104 Authentication Dial In User Service” (Radius) is used for authentication.
• Modbus RTU, Modbus TCP/IP
Event Recorder (Syslog for SEM)
The 850 has two interfaces as USB front port and Wi-Fi for ease of access
to the relay. Capture all cyber security related events within a SOE element (login, logout,
invalid password attempts, remote/local access, user in session, settings
Wi-Fi Connectivity: change, FW update, etc), and then serve and classify data by security
• Simplify set-up and configuration level using standard Syslog data format. This will enable integration with
established SEM (Security Event Management) systems.
• Simplify diagnostic retrieval
• Eliminate personnel in front of switchgear Security Server
• WPA-2 security

Access Request: Authentication Request:

Local HMI /
SCADA EMS DMS
Data Role, User, Role, User, Password
Single Line Historian
Password Encrypted (SSH)

D400 D400

ML3000 SWITCH ML3000 SWITCH Authentication Request:

Role, User, Password
LOCAL AREA NETWORK LOCAL AREA NETWORK
Encrypted (SSH)
A B
Cyber Security with Radius Authentication
ML3000 ML3000 ML3000 ML3000

Software & Configuration

SWITCH SWITCH SWITCH SWITCH

The EnerVista™ suite is an industry-leading set of software programs that

simplifies every aspect of using the Multilin 850. EnerVista provides all the
tools to monitor the status of the protected asset, maintain the device and
integrate the information measured by the Multilin 8 Series, into SCADA or
DCS process control systems. The ability to easily view sequence of events
F650 350 469 850 869 889 845 UR
is an integral part of the setup software, as postmortem event analysis is
critical to proper system management.

EnerVista Launchpad
EnerVista Launchpad is a powerful software package that provides
users with all of the setup and support tools needed for configuring and
maintaining Multilin products. The setup tools within Launchpad allow
for the configuration of devices in real-time, by communicating via serial,

8 GEDigitalEnergy.com
 850 Feeder Protection System

Ethernet or modem connections, or offline by creating device setting files Application Challenge: Modern Feeder Protection
to be sent to devices at a later time. Included in Launchpad is a document
archiving and management system that ensures critical documentation is Challenge:
up-to-date and available when needed. Utilities and industrial facilities depend on reliable and secure electricity
8 Series Setup Software services to keep their operations running. Regardless of the type of source,
a fully integrated protection & control scheme is critical to maintaining
8 Series Setup Software is single setup and configuration across the platform uninterrupted power to the entire facility.
and can reduce device setup and configuration time.
Solution:
The Multilin 8 Series offers the ideal solution for protecting, monitoring
Application Challenge: Intelligent Load Shedding
and controlling electrical cables and overhead lines from disturbances
Challenge: or faults. With a fast protection pass, running every 2 msec, the 8 Series
provides unmatched overcurrent, overvoltage, undervoltage, and frequency
In a multiple power source network, it may happen that some power sources
protection. Supporting the latest in industry standard communication
are lost utility circuit creating deficit of the power even with a presence of
protocols, including IEC 62439/PRP and IEC 61850, the Multilin 8 Series easily
in-facility generator. In these partially islanding situations the deficit of active
integrates into new or existing networks.
power may result in a sudden drop of system frequency resulting in power
system instability, bringing the processes and operations to a halt.
Simplified Setup and On-Going Maintenance
Solution: The robust 850 streamlines user workflow processes and simplifies
Being able to dynamically balance and maintain loads in this type of engineering tasks, such as configuration, wiring, testing, commissioning, and
separation scenario requires an intelligent device that has advanced maintenance. Building on the history of simplified setup and configuration,
communications, automation and control logic capabilities. The Multilin the 850 Feeder Protection Relay has implemented simplified setup screens
850 provides distribution networks and industrial facilities with the system to minimize relay setup time. In addition, for local programming, the 850
stability functionality and cost saving options, required to maintain power comes with a fully functional GCP, which allows users to locally monitor the
system availability and process continuity. With advanced protection features asset.
including underfrequency, overfrequency, frequency rate of change, sensitive
reverse power, underfrequency restoration and other elements plus superior Ease-of-Use
communications enabling sharing data with other IEDs, distribution utilities
Continuing its legacy in providing easy-to-use protective relay solutions,
and industrial facilities rely on Multilin’s 850 to deliver reliability, efficiency and
the 850 is designed to minimize product and system configurability
security to the power system.
requirements, for quicker physical installations, easier and simplified setup
and configuration.

1 Easy to Use - Draw-out case 2 Easy to Configure - 1 simple step 3 Detailed Diagnostics

GEDigitalEnergy.com 9
850 Feeder Protection System

Full Color Graphical HMI Front Display The 850 front panel provides 14 LED indicators and 3 LED pushbutton
indicators. 10 LED’s are user- programmable, while “In service” and “Pickup”
A large, full color Graphic Control Panel (GCP) ensures clear representation
LED’s are non-programmable. “Trip” and “Alarm” LED’s are not color
of critical status and measurements. When the keypad and display are not
programmable but can be assigned with selected operands.
being used, the GCP will automatically revert to screen saver mode, which
will turn off the display until one of the local pushbuttons is pushed. User-programmable LED’s can be turned on by a selection of FlexLogic
operands representing protection, control or monitoring elements. Each
The GCP can be used to view device and system status, alarms and event
LED can be configured to be self-reset or latched and labeled based on
logs, and metering information. The GCP and navigation keys simplify relay
the application and user requirements. User-programmable LED’s can be
configuration and setup, allowing users to make setting changes directly
selected to be either Red, Green or Orange to give the distinctive indication
through the front panel. of selected operations.

LED Indicators for Quick Status Indication

The front panel includes user configurable LED’s. Each LED can be completely
configured and named based on the application and user requirements. The
color of each indicator conveys its importance.

G = Green: General Condition

A = Amber: Alert Condition
R = Red: Serious Alarm or Important Status

Single Click Device

Communications
Quick Link Diagnostic
Information

Online Device
Configuration
and Monitoring

Menu Driven Device

Configuration

Offline Device Setting File

Configuration

10 GEDigitalEnergy.com
 850 Feeder Protection System

Front View
Menu path display indicating
location within menu structure

Graphic Control
Panel (GCP)

Soft key navigation

menu
Soft menu navigation keys

LED status indicators Navigation keys

User-programmable Front USB port

pushbuttons
Self-captive screw on
draw-out handle

Rear View
Grounding screw Standard serial and RJ45
Power supply Ethernet module

RTDs
Advanced communications
module (fiber optic port)

Digital I/O,DCMA,
Arc Flash sensors
CT, VT inputs

7.15”
Dimensions & Mounting

9.90” 8.84”

5”
7.5
8.42” 5”
1.5

GEDigitalEnergy.com 11
850 Feeder Protection System

Technical Application Example 1: Industrial Auto Transfer Schemes

Challenge
Bus or source transfer solutions are often necessary for industrial facilities
to ensure power reliability and process continuity. Being able to rapidly
transfer sources was often accomplished through a complex combination
of discrete and auxiliary relays, timers, and/or programmable logic
controllers, all wired together. The usage of these independent devices FIBER/COPPER
CB1 CB2
required a precise sequencing of interlocks, timing, and functions to ensure 850 850
no momentary loss of power could potentially damage critical equipment
or loads. In addition, the large number of physical I/O required made these
schemes expensive to design and implement and difficult to test.
850

Solution
The Multilin 850 offers seamless automated bus transfer scheme solutions, TCB1

maximizing system availability and process uptime. Using a minimal CB3 CB4 CB5 CB6

amount of programming, the 850 eliminates the need for any discrete
devices and device inter-wiring by integrating all the functions directly into
the intelligent device. With advanced communications including embedded
support for IEC 61850 peer-to-peer communications, inter-relay wiring and
physical I/O can be eliminated. The 850 provides a reliable, automatic bus
transfer solution that is easy to design, configure, and maintain.

Technical Application Example 2: Zone Selective Interlocking

Challenge
A Fault in an industrial or utility system is a catastrophic event that causes
Fiber LAN, single
severe damage to equipment and often results in extended system and
or redundant, for
process downtime. These events require a solution that can quickly and added security
Source
reliably detect and issue a coordinated trip command to clear the fault as
fast as possible, reducing total incident energy, equipment damage and
CB1
system downtime.

Solution
Fault 1
With embedded support for IEC 61850, the 850 provides high-speed CB2
data exchange between relays for fast reaction to system issues. As a
coordinated system, interlocked protection can be enabled, to provide
the necessary bus protection. Fast clearance can be achieved for a fault
CB3
that occurs at any feeder or bus location by quickly exchanging signals to
discriminate the fault location.
Fault 2

12 GEDigitalEnergy.com
 850 Feeder Protection System

Technical Application Example 3: Intelligent Auto-Reclose

Challenge
A majority of faults that occur on overhead lines are transient in nature,
CS
meaning that the fault does not recur when the line is re-energized after 845
Transformer
tripping. However, in the event the fault is present after the 1st reclose
attempt, there is a good possibility that next reclose attempts will be
successful and power supply to the customer will be restored. Therefore, in
order to maintain system availability and security, utility operators need an
intelligent auto-reclose solution that allows them to automatically attempt
to re-energize a line multiple times, depending on the system conditions
and user requirements. Today’s environment requires integrated solutions 52 52 52 52 52

into digital relays. 850

Feeder
850
Feeder
850
Feeder
850
Feeder
850
Feeder

In modern feeder topology, substation relay auto-reclose functions should

maintain coordination with downstream reclosures installed along the feeder.

Solution
For customers wanting a reliable and customized auto-reclose scheme, 850 relay can be programmed to change protection setting every time the
a device with integrated logic capabilities is necessary. The 850 offers downstream reclosure operates and also maintain same reclosure count
comprehensive protection and auto-reclose functions integrated in one box. as downstream reclosure.

Up to four auto-reclose operations are possible, each with a programmable

dead time. For each reclose shot, the relay can be programmed to block IOC
elements, and to adjust the curve characteristics of any TOC element. The
number of shots can be reduced by high currents. Maximum rate per hour
reclose shots would prevent breaker drive and insulation overstressing.

Technical Application Example 4: Adaptive Protection

Challenge: 850 Feeder Relay

To effectively manage an electrical system, operators need the ability and

flexibility to change power output on a seasonally or even hourly basis due
to scheduled maintenance, seasonal load changes and transfers, scheduled
switching, transformer inrush or motor starting currents. These changes
S
could have an adverse effect on the reliability of the system and connected
loads and requires a protection device that can adapt to ensure secure and
dependable protection.

One such application where dynamic setting group change ability is ideal, 52 52
is with a parallel feeder application where two lines are in service and carry
a portion of the required load. If there is an unplanned outage with one of
the feeder lines, such that all loads are now supplied by one feeder, key
protection settings would need to be adjusted to ensure proper coordination 52 52
with downstream devices and deliver secure reliable service.
52

Solution:
The Multilin 850 offers effective, reliable management of feeders. With
dynamic, sensitive settings, the 850 provides secure and dependable
protection. With six setting groups the 850 provides the sensitive settings
52
range and groups required to ensure no compromise is made to meet
changing system conditions. These setting groups can be enabled
automatically or manually to address system needs, ensuring greater
system reliability and efficiency.

GEDigitalEnergy.com 13
850 Feeder Protection System

Typical Wiring

L
O
52 A
WYE VT D
SEE VT WIRING IN
CONNECTION
INSTRUCTION MANUAL

CONTROL
POWER
SEE GROUND
INPUT WIRING IN
INSTRUCTION MANUAL

J1 J2 J3 J4 J5 J6 J7 J8 K7 K8 J9 J10 J11 J12 J13 J14 J15 J16 A1 A2 A3

BUS IA N IB N IC N IG N Isg N VA VA VB VB VC VC VX VX

GROUND
NEUTRAL
SLOT A

LINE
PHASE A PHASE B PHASE C GROUND
CURRENT INPUTS VOLTAGE INPUTS PWR SUPPLY

CTs and VTs are part of the chassis GND

SLOTS J&K STUD
GROUND
BUS
F13 DIGITAL INPUT 1 F1 TRIP
F14 DIGITAL INPUT 2
TRIP F2
TRIP
CIRCUIT
DIGITAL INPUTS

COIL
F15 DIGITAL INPUT 3 52a SEE TRIP AND
V F3 CLOSE COIL
F16 DIGITAL INPUT 4
F17 DIGITAL INPUT 5
F4 CLOSE MONITORING
F18 DIGITAL INPUT 6
CLOSE F5 CLOSE
COIL CIRCUIT IN INSTRUCTION
52b MANUAL
V F6

OUTPUT RELAYS
F19 DIGITAL INPUT 7
F20 COMMON F7
F21 +24 V AUXILIARY F8
F9
F10
AUXILIARY F11
F12 OUTPUT CONTACTS
SHOWN WITH NO
CRITICAL F22 CONTROL POWER
FAILURE F23
RELAY
SLOT F: I/O_A F24

G13 DIGITAL INPUT 1 G1

G14 DIGITAL INPUT 2
AUXILIARY G2
DIGITAL INPUTS

G15 DIGITAL INPUT 3

G3
G16 DIGITAL INPUT 4
G4
G17 DIGITAL INPUT 5
AUXILIARY G5
G18 DIGITAL INPUT 6
G6
OUTPUT RELAYS

G19 DIGITAL INPUT 7

G20 COMMON G7
G21 +24 V AUXILIARY G8
G9
G10
AUXILIARY G11
G12
G22
AUXILIARY G23
PERSONAL
COMPUTER SLOT G: I/O_A (OPTIONAL) G24

ETHERNET
[BACK PANEL ETHERNET PORT RJ45 OR ST]

USB
850 Feeder Protection System
[FRONT PANEL LOCAL
Rear Panel
PROGRAMMING PORT]
ETHERNET ETHERNET
SLOT D: COMMUNICATIONS
RJ45 FIBER1 FIBER2

ST ST

Front Panel
PERSONAL
USB
COMPUTER COMMUNICATIONS RESERVED CAN
TYPE B OPEN DELTA VT CONNECTION
IRIG-B RS485
COM

WIFI D1 D2 D3 D4 D5 D6 D7 D8 D9 D10
ACCESS POINT

J9 J10 J11 J12 J13 J14

892771A4.cdr

14 GEDigitalEnergy.com
 850 Feeder Protection System

Functional Block Diagram

BUS

ANSI Device Description

25 Synchrocheck
27P (2) Phase Undervoltage
32 (2) Directional Power
32N Wattmetric Ground Fault (Wattmetric zero sequence directional)
27X (2) Auxiliary Undervoltage
49 Cable Thermal Model
50BF Breaker Failure
50G Ground Ground Instantaneous Overcurrent
50SG Sensitive Ground Instantaneous Overcurrent
27P 59P 59N 59_2 VTFF 81U 81O 81R
2 2 4 2
50N (2) Neutral Instantaneous Overcurrent
V_2 V_0
50P (2) Phase Instantaneous Overcurrent
3 CTs
50_2 Negative Sequence Instantaneous Overcurrent
50BF CLP 51P 50P 67P 51_2 50_2 67_2 32 49 32N 51N 50N 67N
2 2 2 2 2 51G Ground Time Overcurrent
RGF
51SG Sensitive Ground Time Overcurrent
50G/ 67G
51G 50G
51G 51N (2) Neutral Time Overcurrent
51P (2) Phase Time Overcurrent
CT
50G/ 67SG
51SG 50SG
51_2 Negative Sequence Time Overcurrent
51G
52 AC Circuit Breaker
59N Neutral Overvoltage
BREAKER
METERING 59P (2) Phase Overvoltage
52
TRANSIENT RECORDER
EVENT RECORDER 59X Auxiliary Overvoltage
FAULT REPORT
79 59_2 Negative Sequence Overvoltage
TRIP CLOSE
67G Ground Directional Element
MONITORING 67SG Sensitive Ground Directional Element
25 67N Neutral Directional Element
27X 59X 850 67P Phase Directional Element
2 Feeder Protection System 67_2 Negative Sequence Directional Element
LOAD
892770A1.CDR
79 Automatic Recloser
81O Overfrequency
81U (4) Underfrequency
81R Frequency Rate of Change
87G Restricted Ground Fault
I2/I1 Broken Conductor
VTFF Voltage Transformer Fuse Failure

Testing and Certification

Test Reference Standard Test Level
Dielectric voltage withstand 2.3 kV
Impulse voltage withstand EN60255-5 5KV
Damped Oscillatory IEC61000-4-18IEC60255-22-1 2.5 kV CM, 1 kV DM
Electrostatic Discharge EN61000-4-2/IEC60255-22-2 Level 4
RF immunity EN61000-4-3/IEC60255-22-3 Level 3
Fast Transient Disturbance EN61000-4-4/IEC60255-22-4 Class A and B
Surge Immunity EN61000-4-5/IEC60255-22-5 Level 3 & 4
Conducted RF Immunity EN61000-4-6/IEC60255-22-6 Level 3
Power Frequency Immunity EN61000-4-7/IEC60255-22-7 Class A & B
PQT levels based on IEC61000-4-29, IEC61000-4-11 and
Voltage interruption and Ripple DC IEC60255-11
IEC61000-4-17
Radiated & Conducted Emissions CISPR11 /CISPR22/ IEC60255-25 Class A
Sinusoidal Vibration IEC60255-21-1 Class 1
Shock & Bump IEC60255-21-2 Class 1
Siesmic IEC60255-21-3 Class 2
Power magnetic Immunity IEC61000-4-8 Class 5
Pulse Magnetic Immunity IEC61000-4-9 Class 4
Damped Magnetic Immunity IEC61000-4-10 Class 4
Voltage Dip & interruption IEC61000-4-11 0, 40, 70, 80% dips, 250/300 cycle interrupts
Conducted RF Immunity 0-150khz IEC61000-4-16 Level 4
Ingress Protection IEC60529 IP54 front
Environmental (Cold) IEC60068-2-1 -40C 16 hrs
Environmental (Dry heat) IEC60068-2-2 85C 16hrs
Relative Humidity Cyclic IEC60068-2-30 6day variant 2
EFT IEEE/ANSI C37.90.1 4KV, 2.5 khz
Damped Oscillatory IEEE/ANSI C37.90.1 2.5KV, 1 Mhz
RF Immunity IEEE/ANSIC37.90.2 20V/m, 80 MhZ to 1Ghz
ESD IEEE/ANSIC37.90.3 8KV CD/ 15 kV AD
Safety UL508 e57838 NKCR
UL C22.2-14 e57838 NKCR7

Approvals Environmental
Applicable Council Directive According to Ambient temperatures:
Low voltage directive EN60255-5 / EN60255-27 Storage/Shipping: - 40C to 85C
CE compliance EN60255-26 / EN50263 Operating: -40C to 60C
EMC Directive
EN61000-6-2 / EN61000-6-4 Operating up to 95% (non condensing) @ 55C (As per
Humidity:
cULus UL508 IEC60068-2-30 Variant 2, 6days)
North America UL1053 Altitude: 2000m (max)
C22.2.No 14 Pollution Degree: II
Manufactured under a registered quality Overvoltage Category: III
ISO ISO9001
program Ingress Protection: IP54 Front

GEDigitalEnergy.com 15
Ordering

850 E ** NN ** H * * A * * G * * * * * * * * * N Description

Base Unit 850 English Language; High Voltage PS, Graphical Control Panel

Language E English
Phase Currents - P1 1A three phase current inputs
Bank 1/2 P5 5A three phase current inputs
Phase Currents - NN No phase current inputs
Bank 3
Ground Currents G1 1A ground input
G5 5A ground input
S1 1A ground + 1A sensitive ground input
S5 5A ground + 5A sensitive ground input
D1 1A ground + 1A ground input
D5 5A ground + 5A ground input
Power Supply H 110 - 250 V dc/110 - 230 Vac
Slot B - LV I/O N None
R 6 X RTDs (PT100, NI100, NI120)
S 6 X RTDs (PT100, NI100, NI120, CU10)
Slot C - LV I/O N None
R 6 X RTDs (PT100, NI100, NI120)
S 6 X RTDs (PT100, NI100, NI120, CU10)
Slot F - HV I/O A 2 Form A (Vmon), 3 Form C, 7 Digital Inputs (Low / High voltage, Int/
Ext supply)
Slot G - HV I/O N None
A 2 Form A (Vmon), 3 Form C, 7 Digital Inputs (Low / High voltage, Int/
Ext supply)
L 7 DcmA O/P + 4 DcmA I/P + 1 RTD
Slot H - HV I/O N None
F 10 Digital Inputs + 4 Arc flash inputs
2 Form A (Vmon), 3 Form C, 7 Digital Inputs (Low / High voltage,
A Int/Ext supply)
Faceplate G Color Graphical Display
Current Protection S Basic = 50P, 50N, 50G, 51P, 51N, 51G
M Standard = Basic + 50SG, 50_2, 51SG, 51_2, RGF
A Advanced = Standard + 49,67P, 67N, 67G, 67SG, 67_2, Load
Encroachment, Broken Conductor, Fast U/F
Voltage Monitoring S Standard = 27P, 27X, 59P, 59N, 59X, 81O, 81U
& Protection P Advanced = Standard + 25, 32, 32N, 55, 59_2, 81R
Control B Basic = Setpoint Group Control, Virtual Inputs, Trip Bus, Breaker Control
F Standard = Basic + Flexlogic, CLP, 50BF
C Advanced = Standard + Autorelcose, Bus Transfer (Requires voltage
option P)
Monitoring B Basic = Breakers Coil Monitoring, Breaker Arcing, Harmonics, THD,
Demand, Trip Counters
C Basic + Advanced Breaker Health
Communications S E Standard = Front USB, 1 x Rear RS485 : Modbus RTU, DNP3.0,
IEC60870-5-103 + 1 x Ethernet: Modbus TCP, DNP3.0 TCP
1 E Advanced = Front USB, 1 x Rear RS485 + 2 x Ethernet Fiber, MODBUS
RTU / TCP, DNP3.0, IEC 60870-5-103/104, 1588, SNTP
1 P Advanced + PRP
2 A Advanced + IEC 61850
2 E Advanced + PRP + IEC 61850
Fiber Optic N None
Connector S ST, Multi-mode 850nm
Wireless N None
Communication W WiFi 802.11
Security B Basic
A Advanced - CyberSentry
Future Option N Not available

Note: Harsh Environment Coating is a standard feature on all 8 series units.

GEDigitalEnergy.com
IEC is a registered trademark of Commission Electrotechnique Internationale. IEEE is a registered
trademark of the Institute of Electrical Electronics Engineers, Inc. Modbus is a registered trademark of
Schneider Automation. NERC is a registered trademark of North American Electric Reliability Council.
NIST is a registered trademark of the National Institute of Standards and Technology.
GE, the GE monogram, Multilin, FlexLogic, EnerVista and CyberSentry are trademarks of General Electric
Company.

GE reserves the right to make changes to specifications of products described at any time without notice
and without obligation to notify any person of such changes.
GEA-12739G(E)
English
Copyright 2015, General Electric Company. All Rights Reserved. 151014