Ge Multilin 850 User manual

Instruction manual

850 version: 2.0x

GE publication code: 1601-0298-AB (GEK-119591K)

*1601-0298-AB*

850

Feeder Protection System

Feeder protection and control

Grid Solutions

GE Multilin 850 Feeder Protection System instruction manual for revision 2.0x.

850 Feeder Protection System, EnerVista, EnerVista Launchpad, and EnerVista 8 Series

Setup software are registered trademarks of GE Multilin Inc.

The contents of this manual are the property of GE Multilin Inc. This documentation is

furnished on license and may not be reproduced in whole or in part without the permission

of GE Multilin. The content of this manual is for informational use only and is subject to

change without notice.

Part number: 1601-0298-AB (July 2017)

Note May contain components with FCC ID: XF6-RS9110N1122

and IC ID: 8407A-RS9110N1122.

850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL I

Table of Contents

1.INTRODUCTION Overview .............................................................................................................................................. 1 - 1

Description of the 850 Feeder Protection System............................................................ 1 - 2

Security Overview............................................................................................................................ 1 - 7

850 Order Codes............................................................................................................................... 1 - 8

Specifications...................................................................................................................................1 - 11

Device .......................................................................................................................................................... 1 - 11

Protection................................................................................................................................................... 1 - 11

Control......................................................................................................................................................... 1 - 21

Monitoring.................................................................................................................................................. 1 - 23

Recording................................................................................................................................................... 1 - 24

User-Programmable Elements ........................................................................................................ 1 - 25

Metering...................................................................................................................................................... 1 - 26

Inputs ........................................................................................................................................................... 1 - 28

Outputs........................................................................................................................................................ 1 - 29

Power Supply ........................................................................................................................................... 1 - 31

Communications .................................................................................................................................... 1 - 31

Testing & Certification.......................................................................................................................... 1 - 32

Physical....................................................................................................................................................... 1 - 33

Environmental.......................................................................................................................................... 1 - 33

Cautions and Warnings ..............................................................................................................1 - 34

Safety words and definitions............................................................................................................ 1 - 34

General Cautions and Warnings..................................................................................................... 1 - 34

Must-read Information................................................................................................................1 - 37

Storage........................................................................................................................................................ 1 - 38

For Further Assistance.................................................................................................................1 - 38

Repairs......................................................................................................................................................... 1 - 38

2.INSTALLATION Mechanical Installation................................................................................................................. 2 - 1

Product Identification..............................................................................................................................2 - 1

Dimensions...................................................................................................................................................2 - 2

Mounting .......................................................................................................................................................2 - 3

Standard Panel Mount.............................................................................................................................2 - 4

Depth Reducing Collar.............................................................................................................................2 - 5

Draw-out Unit Withdrawal and Insertion ......................................................................................2 - 7

Removable Power Supply .....................................................................................................................2 - 8

Removable Magnetic Module..............................................................................................................2 - 9

Arc Flash Sensor ..................................................................................................................................... 2 - 10

Sensor Fiber Handling & Storage ....................................................................................................2 - 10

Sensor Installation..................................................................................................................................2 - 10

Electrical Installation ....................................................................................................................2 - 11

Typical Wiring Diagram....................................................................................................................... 2 - 11

Terminal Identification......................................................................................................................... 2 - 13

Wire Size......................................................................................................................................................2 - 17

Phase Sequence and Transformer Polarity............................................................................... 2 - 18

Ground CT Inputs.................................................................................................................................... 2 - 18

Voltage Inputs.......................................................................................................................................... 2 - 20

Restricted Earth Fault Inputs ............................................................................................................ 2 - 20

Zero-Sequence CT Installation......................................................................................................... 2 - 21

Control Power........................................................................................................................................... 2 - 22

Contact Inputs ......................................................................................................................................... 2 - 22

Output Relays .......................................................................................................................................... 2 - 23

II 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL

Serial Communications ........................................................................................................................2 - 26

IRIG-B............................................................................................................................................................2 - 27

3.INTERFACES Front Control Panel Interface......................................................................................................3 - 2

850 Graphical Display Pages .............................................................................................................. 3 - 3

Working with Graphical Display Pages .......................................................................................... 3 - 5

Single Line Diagram................................................................................................................................. 3 - 7

Rugged and Membrane Front Panel LEDs .................................................................................... 3 - 8

Home Screen Icons................................................................................................................................3 - 10

Relay Messages.......................................................................................................................................3 - 11

Target Messages.....................................................................................................................................3 - 11

Self-Test Errors.........................................................................................................................................3 - 12

Out of Service............................................................................................................................................3 - 15

Flash Messages........................................................................................................................................3 - 15

Label Removal..........................................................................................................................................3 - 15

Software Interface ........................................................................................................................ 3 - 17

EnerVista 8 Series Setup Software..................................................................................................3 - 17

Hardware & Software Requirements ............................................................................................3 - 17

Installing the EnerVista 8 Series Setup Software.....................................................................3 - 18

Upgrading the Software ......................................................................................................................3 - 20

Connecting EnerVista 8 Series Setup software to the Relay..............................................3 - 21

Using the Quick Connect Feature ...................................................................................................3 - 21

Configuring Ethernet Communications........................................................................................3 - 23

Connecting to the Relay ......................................................................................................................3 - 24

Working with Setpoints & Setpoints Files ....................................................................................3 - 25

Engaging a Device..................................................................................................................................3 - 25

Entering Setpoints ..................................................................................................................................3 - 25

File Support................................................................................................................................................3 - 26

Using Setpoints Files..............................................................................................................................3 - 27

Downloading & Saving Setpoints Files..........................................................................................3 - 27

Adding Setpoints Files to the Environment.................................................................................3 - 27

Creating a New Setpoints File...........................................................................................................3 - 29

Upgrading Setpoints Files to a New Revision............................................................................3 - 30

Printing Setpoints....................................................................................................................................3 - 31

Printing Values from a Connected Device...................................................................................3 - 32

Loading Setpoints from a File ...........................................................................................................3 - 32

Uninstalling Files and Clearing Data..............................................................................................3 - 33

Quick Setup................................................................................................................................................3 - 33

Upgrading Relay Firmware................................................................................................................3 - 35

Loading New Relay Firmware...........................................................................................................3 - 36

Advanced EnerVista 8 Series Setup Software Features .......................................................3 - 39

SLD Configurator.....................................................................................................................................3 - 39

FlexCurve Editor.......................................................................................................................................3 - 46

Transient Recorder (Waveform Capture).....................................................................................3 - 47

Protection Summary.............................................................................................................................3 - 51

Offline Settings File Conversion........................................................................................................3 - 53

Convert SR 750/760 Files ....................................................................................................................3 - 53

Conversion Summary Report............................................................................................................3 - 54

Results Window .......................................................................................................................................3 - 54

4.SETPOINTS Setpoints Main Menu ......................................................................................................................4 - 1

Setpoints Entry Methods ....................................................................................................................... 4 - 2

Common Setpoints................................................................................................................................... 4 - 3

Logic Diagrams.......................................................................................................................................... 4 - 4

Setpoints Text Abbreviations............................................................................................................... 4 - 5

Device.....................................................................................................................................................4 - 6

850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL III

Custom Configuration.............................................................................................................................4 - 6

Clock................................................................................................................................................................4 - 9

Real-time Clock...........................................................................................................................................4 - 9

PTP Configuration......................................................................................................................................4 - 9

Clock..............................................................................................................................................................4 - 11

SNTP Protocol ...........................................................................................................................................4 - 12

Security ....................................................................................................................................................... 4 - 13

Basic Security...........................................................................................................................................4 - 14

CyberSentry ..............................................................................................................................................4 - 15

Communications .................................................................................................................................... 4 - 23

RS485............................................................................................................................................................4 - 23

WiFi................................................................................................................................................................4 - 23

USB ................................................................................................................................................................4 - 26

Ethernet Ports...........................................................................................................................................4 - 27

Modbus Protocol .....................................................................................................................................4 - 29

Routing.........................................................................................................................................................4 - 33

DNP Protocol.............................................................................................................................................4 - 36

DNP / IEC104 Point Lists ......................................................................................................................4 - 38

IEC 60870-5-104 .....................................................................................................................................4 - 41

IEC 60870-5-103 .....................................................................................................................................4 - 42

IEC 61850....................................................................................................................................................4 - 43

Remote Modbus Device.......................................................................................................................4 - 45

Transient Recorder ................................................................................................................................ 4 - 46

Data Logger .............................................................................................................................................. 4 - 48

Fault Reports ............................................................................................................................................ 4 - 51

Event Data ................................................................................................................................................. 4 - 53

Flex States.................................................................................................................................................. 4 - 54

Front Panel ................................................................................................................................................ 4 - 54

Programmable LEDs..............................................................................................................................4 - 54

Programmable Pushbuttons .............................................................................................................4 - 56

Tab Pushbuttons .....................................................................................................................................4 - 61

Annunciator...............................................................................................................................................4 - 64

Display Properties ..................................................................................................................................4 - 67

Default Screens........................................................................................................................................4 - 68

Home Screens..........................................................................................................................................4 - 68

Resetting..................................................................................................................................................... 4 - 69

Installation................................................................................................................................................. 4 - 70

System ................................................................................................................................................4 - 71

Current Sensing....................................................................................................................................... 4 - 71

Voltage Sensing ...................................................................................................................................... 4 - 72

Traditional VT............................................................................................................................................4 - 72

Power System .......................................................................................................................................... 4 - 73

Breakers...................................................................................................................................................... 4 - 74

Switches...................................................................................................................................................... 4 - 76

FlexCurves ................................................................................................................................................. 4 - 79

Inputs...................................................................................................................................................4 - 87

Contact Inputs ......................................................................................................................................... 4 - 87

Virtual Inputs ............................................................................................................................................ 4 - 90

Analog Inputs ........................................................................................................................................... 4 - 92

Remote Inputs.......................................................................................................................................... 4 - 96

Outputs ...............................................................................................................................................4 - 97

Output Relays .......................................................................................................................................... 4 - 97

Output Relay 1 (F1) Trip.....................................................................................................................4 - 100

Output Relay 2 (F4) programmed as Close..............................................................................4 - 102

Auxiliary Output Relays .................................................................................................................... 4 - 104

Critical Failure Relay #8.................................................................................................................... 4 - 105

Virtual Outputs.......................................................................................................................................4 - 106

IV 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL

Analog Outputs.....................................................................................................................................4 - 106

Protection....................................................................................................................................... 4 - 108

Feeder Elements...................................................................................................................................4 - 110

Undercurrent (37).................................................................................................................................4 - 110

Current Elements .................................................................................................................................4 - 113

Inverse Time Overcurrent Curves.................................................................................................4-114

Percent of Load-To-Trip....................................................................................................................4 - 121

Phase Time Overcurrent Protection (51P).................................................................................4 - 121

Phase Instantaneous Overcurrent Protection (50P) ............................................................4 - 124

Phase Directional Overcurrent Protection (67P)....................................................................4 - 126

Neutral Time Overcurrent Protection (51N).............................................................................4 - 129

Neutral Instantaneous Overcurrent Protection (50N).........................................................4 - 132

Neutral Directional Overcurrent Protection (67N) ................................................................4 - 135

Ground Time Overcurrent Protection (51G).............................................................................4 - 140

Ground Instantaneous Overcurrent Protection (50G).........................................................4 - 142

Ground Directional Overcurrent Protection (67G) ................................................................4 - 144

Sensitive Ground Time Overcurrent Protection (51SG).......................................................4 - 149

Sensitive Ground Instantaneous Overcurrent Protection (50SG) ..................................4 - 152

Sensitive Ground Directional Overcurrent Protection (67SG)..........................................4 - 154

Restricted Ground (Earth) Fault (87G) .........................................................................................4 - 159

Switch on to Fault (SOTF)..................................................................................................................4 - 164

Negative Sequence Time Overcurrent Protection (51_2)..................................................4 - 167

Negative Sequence Instantaneous Overcurrent Protection (50_2)..............................4 - 169

Negative Sequence Directional Overcurrent Protection (67_2) .....................................4 - 172

Broken Conductor................................................................................................................................4 - 176

Load Encroachment...........................................................................................................................4 - 178

Thermal Overload (49) .......................................................................................................................4 - 182

Voltage Elements .................................................................................................................................4 - 185

Undervoltage Curves .........................................................................................................................4 - 185

Phase Undervoltage Protection (27P).........................................................................................4 - 187

Timed Undervoltage Protection (27T).........................................................................................4 - 190

UV Reactive Power (27Q)..................................................................................................................4 - 200

Auxiliary Undervoltage (27X) ..........................................................................................................4 - 207

Phase Overvoltage Protection (59P)............................................................................................4 - 210

Auxiliary Overvoltage Protection (59X) ......................................................................................4 - 213

Neutral Overvoltage Protection (59N) ........................................................................................4 - 216

Negative Sequence Overvoltage Protection (59_2).............................................................4 - 219

Admittance..............................................................................................................................................4 - 221

Neutral Admittance (21YN)..............................................................................................................4 - 221

Power Elements....................................................................................................................................4 - 228

Directional Power (32)........................................................................................................................4 - 228

Wattmetric Ground Fault (32N)..................................................................................................... 4 - 234

Frequency Elements...........................................................................................................................4 - 239

Underfrequency (81U) .......................................................................................................................4 - 239

Overfrequency (81O) ..........................................................................................................................4 - 242

Frequency Rate of Change (81R)..................................................................................................4- 245

Fast Underfrequency.........................................................................................................................4 - 249

Monitoring...................................................................................................................................... 4 - 253

Trip and Close Circuit Monitoring .................................................................................................4 - 253

Breaker Arcing Current......................................................................................................................4 - 261

Breaker Health ......................................................................................................................................4 - 264

Functions .................................................................................................................................................4 - 268

Power Factor (55) .................................................................................................................................4 - 268

Demand....................................................................................................................................................4 - 274

Pulsed Outputs......................................................................................................................................4 - 283

Digital Counters ....................................................................................................................................4 - 286

Harmonic Detection ...........................................................................................................................4 - 289

RTD Temperature.................................................................................................................................4 - 292

850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL V

RTD Trouble.............................................................................................................................................4 - 297

Loss of Communications ..................................................................................................................4 - 298

Control..............................................................................................................................................4 - 300

Setpoint Group.......................................................................................................................................4 - 300

Local Control Mode (breakers and switches) ..........................................................................4 - 303

Breaker Control .....................................................................................................................................4 - 312

Switch Control (9)..................................................................................................................................4 - 315

Pole Discordance (52) .........................................................................................................................4 - 318

Virtual Input Control............................................................................................................................4 - 324

Trip Bus......................................................................................................................................................4 - 325

Breaker Failure (50BF) ........................................................................................................................4 - 327

Setup.......................................................................................................................................................... 4 - 328

Initiate ....................................................................................................................................................... 4 - 330

Arc Flash Protection ............................................................................................................................4 - 332

Synchrocheck (25)................................................................................................................................4 - 334

Manual Close Blocking.......................................................................................................................4 - 339

Cold Load Pickup ..................................................................................................................................4 - 342

Undervoltage Restoration................................................................................................................4 - 346

Underfrequency Restoration..........................................................................................................4 - 350

Bus Transfer............................................................................................................................................4 - 354

ATS Wiring Diagrams ......................................................................................................................... 4 - 373

Autoreclose .............................................................................................................................................4 - 377

Setup.......................................................................................................................................................... 4 - 379

Initiate ....................................................................................................................................................... 4 - 385

Shot ............................................................................................................................................................ 4 - 386

Rate Supervision................................................................................................................................... 4 - 387

Current Supervision ............................................................................................................................ 4 - 390

Zone Coordination............................................................................................................................... 4 - 392

CT Supervision........................................................................................................................................4 - 394

VT Fuse Failure (VTFF).........................................................................................................................4 - 401

FlexLogic .........................................................................................................................................4 - 403

Timers ........................................................................................................................................................4 - 414

Non-volatile Latches...........................................................................................................................4 - 414

FlexLogic Equation...............................................................................................................................4 - 416

Viewing FlexLogic Graphics ............................................................................................................ 4 - 418

FlexElements...........................................................................................................................................4 - 418

Testing..............................................................................................................................................4 - 425

Simulation................................................................................................................................................4 - 425

Setup.......................................................................................................................................................... 4 - 426

Pre-Fault................................................................................................................................................... 4 - 427

Fault ........................................................................................................................................................... 4 - 427

Post-Fault ................................................................................................................................................ 4 - 428

Test LEDs ..................................................................................................................................................4 - 428

Contact Inputs .......................................................................................................................................4 - 429

Output Relays ........................................................................................................................................4 - 429

Ethernet Loopback Test.....................................................................................................................4 - 429

5.STATUS Summary ............................................................................................................................................. 5 - 2

Configurable SLD.......................................................................................................................................5 - 2

Annunciator .................................................................................................................................................5 - 2

Tab Pushbuttons........................................................................................................................................5 - 3

Breakers ............................................................................................................................................... 5 - 4

Switches ............................................................................................................................................... 5 - 4

Last Trip Data..................................................................................................................................... 5 - 5

Arc Flash............................................................................................................................................... 5 - 5

VI 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL

Contact Inputs....................................................................................................................................5 - 6

Output Relays.....................................................................................................................................5 - 6

Output Relay 1 (TRIP)............................................................................................................................... 5 - 6

Output Relay 2 (CLOSE) .......................................................................................................................... 5 - 6

Virtual Inputs.......................................................................................................................................5 - 7

Virtual Outputs...................................................................................................................................5 - 8

Flex State..............................................................................................................................................5 - 8

Communications...............................................................................................................................5 - 8

GOOSE Rx and Tx ...................................................................................................................................... 5 - 8

Information.......................................................................................................................................5 - 13

Main CPU.....................................................................................................................................................5 - 13

Comms CPU...............................................................................................................................................5 - 13

Hardware Versions.................................................................................................................................5 - 13

Environment..............................................................................................................................................5 - 14

Device Status...................................................................................................................................5 - 15

Clock ....................................................................................................................................................5 - 16

PTP Status..........................................................................................................................................5 - 16

Autoreclose.......................................................................................................................................5 - 17

6.METERING Summary..............................................................................................................................................6 - 4

Admittance ..........................................................................................................................................6 - 5

Neutral Admittance 1.............................................................................................................................. 6 - 5

Currents.................................................................................................................................................6 - 5

Voltages ................................................................................................................................................6 - 7

Frequency............................................................................................................................................6 - 8

Fast Underfrequency......................................................................................................................6 - 9

Harmonics 1(Harmonics 2)...........................................................................................................6 - 9

Harmonic Detection .....................................................................................................................6 - 10

Synchrocheck..................................................................................................................................6 - 10

Power...................................................................................................................................................6 - 11

Energy.................................................................................................................................................6 - 12

Power Factor....................................................................................................................................6 - 13

Current Demand 1.........................................................................................................................6 - 13

Power Demand...............................................................................................................................6 - 14

Thermal Capacity ..........................................................................................................................6 - 14

Directional Power ..........................................................................................................................6 - 15

Wattmetric Ground Fault...........................................................................................................6 - 15

CT Supervision (CTS)......................................................................................................................6 - 15

Arc Flash ............................................................................................................................................6 - 16

RTDs .....................................................................................................................................................6 - 16

RTD Maximums............................................................................................................................... 6 - 17

Analog Inputs...................................................................................................................................6 - 17

FlexElements....................................................................................................................................6 - 17

7.RECORDS Events.....................................................................................................................................................7 - 1

Transient Records.............................................................................................................................7 - 1

Fault Reports.......................................................................................................................................7 - 2

Data Logger.........................................................................................................................................7 - 3

Breakers................................................................................................................................................7 - 4

Breaker Arcing Current........................................................................................................................... 7 - 4

Breaker Health ........................................................................................................................................... 7 - 4

850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL VII

Digital Counters ................................................................................................................................ 7 - 4

Remote Modbus Device................................................................................................................ 7 - 5

Clear Records..................................................................................................................................... 7 - 7

8.MAINTENANCE Environmental Health Report.....................................................................................................8-1

General Maintenance..................................................................................................................... 8 - 3

In-service Maintenance..........................................................................................................................8 - 3

Out-of-service Maintenance................................................................................................................8 - 3

Unscheduled Maintenance (System Interruption).....................................................................8 - 3

A.APPENDIX A Warranty.............................................................................................................................................. A - 1

Revision history................................................................................................................................. A - 1

Major Updates ............................................................................................................................................A - 2

VIII 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL

850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 1–1

850 Feeder Protection System

Chapter 1: Introduction

Grid Solutions

Introduction

The Multilin™ 850 relay is a member of the Multilin 8 Series protective relay platform

designed for the management, protection and control of feeder applications. The Multilin

850 is used to provide primary (main) or backup protection for underground and overhead

feeders for utility and industrial power networks.

Overview

Each relay provides protection, control, and monitoring functions with both local and

remote human interfaces. They also display the present trip/alarm conditions, and most of

the more than 35 measured system parameters. Recording of past trip, alarm or control

events, maximum demand levels, and energy consumption is also performed.

These relays contain many innovative features. To meet diverse utility standards and

industry requirements, these features have the flexibility to be programmed to meet

specific user needs. This flexibility will naturally make a piece of equipment difficult to

learn. To aid new users in getting basic protection operating quickly, setpoints are set to

typical default values and advanced features are disabled. These settings can be

reprogrammed at any time.

Programming can be accomplished with the front panel keys and display. Due to the

numerous settings, this manual method can be somewhat laborious. To simplify

programming and provide a more intuitive interface, setpoints can be entered with a PC

running the EnerVista 8 Setup software provided with the relay. Even with minimal

computer knowledge, this menu-driven software provides easy access to all front panel

functions. Actual values and setpoints can be displayed, altered, stored, and printed. If

settings are stored in a setpoint file, they can be downloaded at any time to the front panel

program port of the relay via a computer cable connected to the USB port of any personal

computer.

A summary of the available functions and a single-line diagram of protection and control

features is shown below. For a complete understanding of each feature operation, refer to

Chapter 4: Setpoints. The logic diagrams include a reference to every setpoint related to a

feature and show all logic signals passed between individual features. Information related

to the selection of settings for each setpoint is also provided.

1–2 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL

DESCRIPTION OF THE 850 FEEDER PROTECTION SYSTEM CHAPTER 1: INTRODUCTION

Description of the 850 Feeder Protection System

CPU

Relay functions are controlled by two processors: a Freescale MPC5125 32-bit

microprocessor that measures all analog signals and digital inputs and controls all output

relays, and a Freescale MPC8358 32-bit microprocessor that controls all the advanced

Ethernet communication protocols.

Analog Input and Waveform Capture

Magnetic transformers are used to scale-down the incoming analog signals from the

source instrument transformers. The analog signals are then passed through a 11.5 kHz

low pass analog anti-aliasing filter. All signals are then simultaneously captured by sample

and hold buffers to ensure there are no phase shifts. The signals are converted to digital

values by a 16-bit A/D converter before finally being passed on to the CPU for analysis.

The 'raw' samples are scaled in software, then placed into the waveform capture buffer,

thus emulating a fault recorder. The waveforms can be retrieved from the relay via the

EnerVista 8 Series Setup software for display and diagnostics.

Frequency

Frequency measurement is accomplished by measuring the time between zero crossings

of the composite signal of three-phase bus voltages, line voltage or three-phase currents.

The signals are passed through a low pass filter to prevent false zero crossings. Frequency

tracking utilizes the measured frequency to set the sampling rate for current and voltage

which results in better accuracy for the Discrete Fourier Transform (DFT) algorithm for off-

nominal frequencies.

The main frequency tracking source uses three-phase bus voltages. The frequency

tracking is switched automatically by an algorithm to the alternative reference source, i.e.,

three-phase currents signal or line voltage for the configuration of tie-breaker, if the

frequency detected from the three-phase voltage inputs is declared invalid. The switching

will not be performed if the frequency from the alternative reference signal is detected

invalid. Upon detecting valid frequency on the main source, the tracking will be switched

back to the main source. If a stable frequency signal is not available from all sources, then

the tracking frequency defaults to the nominal system frequency.

Phasors, Transients, and Harmonics

All waveforms are processed eight times every cycle with a DC decaying removal filter and

a Discrete Fourier Transform (DFT). The resulting phasors have fault current transients and

all harmonics removed. This results in an overcurrent relay that is extremely secure and

reliable and one that will not overreach.

Processing of AC Current Inputs

The DC Decaying Removal Filter is a short window digital filter, which removes the DC

decaying component from the asymmetrical current present at the moment a fault

occurs. This is done for all current signals used for overcurrent protection; voltage signals

use the same DC Decaying Removal Filter. This filter ensures no overreach of the

overcurrent protection.

The Discrete Fourier Transform (DFT) uses exactly one cycle of samples to calculate a

phasor quantity which represents the signal at the fundamental frequency; all harmonic

components are removed. All subsequent calculations (e.g. power, etc.) are based upon the

current and voltage phasors, such that the resulting values have no harmonic

components. RMS (root mean square) values are calculated from one cycle of samples

prior to filtering.

Protection Elements

All voltage, current and frequency protection elements are processed eight times every

cycle to determine if a pickup has occurred or a timer has expired. The voltage and current

protection elements use RMS current/voltage, or the magnitude of the phasor.

CHAPTER 1: INTRODUCTION DESCRIPTION OF THE 850 FEEDER PROTECTION SYSTEM

850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 1–3

Figure 1-1: Single Line Diagram

Table 1-1: ANSI Device Numbers and Functions

892770A4.CDR

3 CTs

27P 59P 59N 59_2 VTFF 81U 81O 81R

51N 50N 67N

87G

27X 59X

METERING

TRANSIENT RECORDER

EVENT RECORDER

FAULT REPORT

LOAD

BUS

TRIP

MONITORING

CLP50BF 51P 50P 67P 51_2 50_2 67_2 49

50G/

51G

51G 50G 67G

50G/

51G

51SG 50SG 67SG

32N

V_2

BUS

BREAKER

850 Feeder Protection System

V_0

POLE DISCORDANCE*

SOTF*

Fast Underfrequency

UV Restoration

UF Restoration

Bus Transfer

MCB

LIGHT

Broken Conductor

Load Encroachment

CT Supervision

Demand

Pulsed Outputs

Harmonic Detection

37*

21YN 27Q 27T

AFP

* 850-D only

ANSI Device Description

21 YN Neutral Admittance

25 Synchrocheck

27P Phase Undervoltage

27Q UV Reactive Power

27T Timed Undervoltage Protection

27X Auxiliary Undervoltage

32 Directional Power

32N Wattmetric Ground Fault (Wattmetric zero sequence directional)

37 Undercurrent

49 Thermal Overload

50BF Breaker Failure

50G Ground Instantaneous Overcurrent

50SG Sensitive Ground Instantaneous Overcurrent

50N Neutral Instantaneous Overcurrent

50P Phase Instantaneous Overcurrent

50_2 Negative Sequence Instantaneous Overcurrent

51G Ground Time Overcurrent

51SG Sensitive Ground Time Overcurrent

51N Neutral Time Overcurrent

51P Phase Time Overcurrent

1–4 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL

DESCRIPTION OF THE 850 FEEDER PROTECTION SYSTEM CHAPTER 1: INTRODUCTION

Table 1-2: Other Device Functions

51_2 Negative Sequence Time Overcurrent

52 AC Circuit Breaker

Pole Discordance

55 Power Factor

59N Neutral Overvoltage

59P Phase Overvoltage

59X Auxiliary Overvoltage

59_2 Negative Sequence Overvoltage

67G Ground Directional Element

67SG Sensitive Ground Directional Element

67N Neutral Directional Element

67P Phase Directional Element

67_2 Negative Sequence Directional Element

79 Automatic Recloser

81O Overfrequency

81U Underfrequency

81R Frequency Rate of Change

87G Restricted Ground Fault (RGF)

AFP Arc Flash Protection

CLP Cold Load Pickup

I1/12 Broken Conductor

MCB Manual Close Blocking

SOTF Switch Onto Fault

VTFF Voltage Transformer Fuse Failure

Description

Analog Input

Analog Output

Automatic Bus Transfer Scheme (MTM)

Breaker Arcing Current (I2t)

Breaker Control

Breaker Health

CT Supervision

Current/Power Demand

Data Logger

Digital Counters

Event Recorder

Fault Report and Fault Locator

Fast Underfrequency

Flexelements

FlexLogic Equations

Flexstates

Harmonic Detection

IEC 61850 Communications

Metering: current, voltage, power, PF, energy, frequency, harmonics, THD

Load Encroachment

ANSI Device Description

CHAPTER 1: INTRODUCTION DESCRIPTION OF THE 850 FEEDER PROTECTION SYSTEM

850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 1–5

Modbus User Map

Neutral Admittance

Non-volatile Latches

OPC-UA Communications

Output Relays

Pulsed Outputs

Setpoint Groups (6)

Trip Bus (6)

Transient Recorder (Oscillography)

Trip and Close Coil Monitoring

Underfrequency Restoration

Undervoltage Restoration

User-programmable LEDs

User-programmable Pushbuttons

Virtual Inputs (64)

Virtual Outputs (96)

Description

1–6 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL

DESCRIPTION OF THE 850 FEEDER PROTECTION SYSTEM CHAPTER 1: INTRODUCTION

Figure 1-2: Main Menu Hierarchy

Setpoints

Device

System

Inputs

Outputs

Protection

Monitoring

Control

FlexLogic

Status

Metering

Records

Events

Transients

Data Logger

Breakers

Dig Counters

Clear Records

Targets

Fault Reports

Testing

Output Relays

Virtual Inputs

Contact Inputs

Arc Flash

Virtual Outputs

Communications

Information

Device Status

PTP Status

Clock

Last Trip Data

Flex States

Summary

Breakers

Switches

Autoreclose

Summary

Currents

Voltages

Frequency

Harmonics

Synchrocheck

Power

Energy

Current Demand

Thermal Capacity

Power Demand

Directional Power

Wattmetric Gnd Flt

Fast Underfrequency

Arc Flash

Analog Inputs

RTD Maximums

Admittance

Harmonic Detection

Power Factor

RTDs

FlexElements

Remote Modbus Device

CHAPTER 1: INTRODUCTION SECURITY OVERVIEW

850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 1–7

Security Overview

The following security features are available:

BASIC SECURITY

The basic security feature is present in the default offering of the 850 relay. The

850 introduces the notion of roles for different levels of authority. Roles are used as login

names with associated passwords stored on the device. The following roles are available

at present: Administrator, Operator, Factory and Observer, with a fixed permission

structure for each one. Note that the Factory role is not available for users, but strictly

used in the manufacturing process.

The 850 can still use the Setpoint access switch feature, but enabling the feature can be

done only by an Administrator. Setpoint access is controlled by a keyed switch to offer

some minimal notion of security.

CYBERSENTRY

The CyberSentry Embedded Security feature is a software option that provides advanced

security services. When the software option is purchased, the Basic Security is

automatically disabled.

CyberSentry provides security through the following features:

• An Authentication, Authorization, Accounting (AAA) Remote Authentication Dial-In

User Service (RADIUS) client that is centrally managed, enables user attribution, and

uses secure standards based strong cryptography for authentication and credential

protection.

• A Role-Based Access Control (RBAC) system that provides a permission model that

allows access to 850 device operations and configurations based on specific roles

and individual user accounts configured on the AAA server. At present the defined

roles are: Administrator, Operator and Observer.

• Strong encryption of all access and configuration network messages between the

EnerVista software and 850 devices using the Secure Shell (SSH) protocol, the

Advanced Encryption Standard (AES), and 128-bit keys in Galois Counter Mode (GCM)

as specified in the U.S. National Security Agency Suite B extension for SSH and

approved by the National Institute of Standards and Technology (NIST) FIPS-140-2

standards for cryptographic systems.

• Security event reporting through the Syslog protocol for supporting Security

Information Event Management (SIEM) systems for centralized cyber security

monitoring.

There are two types of authentication supported by CyberSentry that can be used to

access the 850 device:

• Device Authentication – in which case the authentication is performed on the

850 device itself, using the predefined roles as users (No RADIUS involvement).

– 850 authentication using local roles may be done either from the front panel or

through EnerVista.

• Server Authentication - in which case the authentication is done on a RADIUS server,

using individual user accounts defined on the server. When the user accounts are

created, they are assigned to one of the predefined roles recognized by the 850

– 850 authentication using RADIUS server may be done only through EnerVista.

FASTPATH: WiFi and USB do not currently support CyberSentry security. For this reason WiFi is

disabled by default if the CyberSentry option is purchased. The user can enable WiFi, but

be aware that doing so violates the security and compliance model that CyberSentry is

supposed to provide.

1–8 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL

850 ORDER CODES CHAPTER 1: INTRODUCTION

When both 850 device and server authentication are enabled, the 850 automatically

directs authentication requests to the 850 device or the respective RADIUS server, based

on user names. If the user ID credential does not match one of the device local accounts,

the 850 automatically forwards the request to a RADIUS server when one is provided. If a

RADIUS server is provided, but is unreachable over the network, server authentication

requests are denied. In this situation, use local 850 device accounts to gain access to the

850 system.

USER ROLES

User Access Levels are used to grant varying permissions to specific user roles. User roles

are used by both Basic Security and CyberSentry.

The following user roles are supported:

•Administrator: The Administrator role has complete read and write access to all

settings and commands. The role does not allow concurrent access. The Administrator

role also has an operand to indicate when it is logged on.

•Operator: The Operator role is present to facilitate operational actions that may be

programmed and assigned to buttons on the front panel. The Operator has read/write

access to all settings under the command menu/section. The Operator can view

settings from EnerVista or the front panel but does not have the ability to change any

settings. This role is not a concurrent role.

•Observer: The Observer role has read-only access to all 850 settings. This role allows

concurrent access. The Observer is the default role if no authentication has been done

to the device. This role can download settings files and records from the device.

•Factory: This is an internal non-user accessible role used for manufacturing

diagnostics. The ability to enable or disable this role is a security setting that the

Administrator controls.

GENERAL RULES FOR USER ROLES WITH CYBERSENTRY

1. The only concurrent role is Observer. If the user is logged in through serial, front panel,

or over the network, that counts as the role being logged in for concurrency reasons.

2. Both EnerVista and the front panel provide a one-step logoff. For the front panel, the

root menu has a logoff command. From EnerVista right-clicking on a device and

providing a logoff function from the context menu is sufficient.

3. The EnerVista Login Screen has “User Name:” and “Password:” fields for the default

remote (Radius) authentication, but when a “Local Authentication” checkbox is

selected the “User Name:” field changes to a drop down menu where the user can

select one of the predefined roles on the 850.

850 Order Codes

NOTE

NOTE: Support of some of the features described in the "Setpoints" section are order code

dependent. Each 8 Series unit is ordered with a number of required and optional modules.

Each of these modules can be supplied in a number of configurations specified at the time

of ordering.

NOTE

NOTE: Refer to https://www.gegridsolutions.com/multilin/catalog/850.htm for available order

code combinations.

The information to specify an 850 relay is provided in the following Order Code figure:

CHAPTER 1: INTRODUCTION 850 ORDER CODES

850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 1–9

Figure 1-3: 850 Order Codes

850  * * NN * * * * A * * * * * * * * * * * * N *

High Voltage Power Supply, Graphical Control Panel)

Model E | | ||||||||||||||||||| Industrial

D| | ||||||||||||||||||| Distribution Feeder

Phase Currents - Slot J P1 | | | | | | | | | | | | | | | | | | | | 1A three-phase current inputs (Slot J) + 4 voltage inputs (J2)

P5 | | | | | | | | | | | | | | | | | | | | 5A three-phase current inputs (Slot J) + 4 voltage inputs (J2)

Phase Currents - Slot K NN ||||||||||||||||||| No phase current inputs (Slot K)

G5 | | | | | | | | | | | | | | | | | | 5A ground input

S1 | | | | | | | | | | | | | | | | | | 1A ground + 1A sensitive ground input

S5 | | | | | | | | | | | | | | | | | | 5A ground + 5A sensitive ground input

D1 | | | | | | | | | | | | | | | | | | 1A ground + 1A polarizing current input

D5 | | | | | | | | | | | | | | | | | | 5A ground + 5A polarizing current input

Power Supply L | | ||||||||||||||| 24 to 48 V DC

H||||||||||||||||| 110 to 250 V DC/110 to 230 V AC

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

|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

|2 Form A (Vmon), 3 Form C, 7 Digital Inputs (Low/High

Voltage, Int/Ext supply)

F | | | | | | | | | | | | 10 Digital Inputs + 4 Arc Flash Inputs

Faceplate M | | | |||||||| Basic = Membrane Keypad

G||||||||||| Standard = Rugged Keypad

M | | | | | | | | | | Standard (850-E): Basic + 50SG(1), 50_2(1), 51SG(1), 51_2(1),

RGF(1)

Standard (850-D) = 37(3), 50P (4/CT bank), 50N (4/CT bank),

50G (4/CT bank), 51P(4), 51N(4), 51G(2/CT bank), 50SG(4/CT

bank), 50_2(4/CT bank), 51SG(2/CT bank), 51_2 (2/CT bank),

RGF(3), SOTF (3/Bkr), 67P(4), 67N(4), 67G (1/CT bank), 67SG (1/

CT bank), 67_2 (1/CT bank), 49(2), Load Encroachment (1/CT

bank), Broken Conductor (3)

Advanced (850-E): Standard (850-E) + 67P(1), 67N(1), 67G(1),

67SG(1), 67_2(1), 49(2), Load Encroachment 1), Broken

Conductor(1)

Voltage Monitoring and Protection S |

Standard Voltage Metering & Protection: 27P (4/VT bank),

27X (2/VT bank), 59P(4), 59N(4), 59X (2/VT bank, 81O (6/VT

bank), 81U (6/VT bank)

Advanced Voltage Metering & Protection: Standard + 25 (1/

CT bank), 27T(4), 27Q(3/Bkr), 32(4), 32N(4), 55(4), 59_2 (2/VT

banks), 81R (6/VT bank), Fast U/F (8), Neutral Admittance (3)

Control B |

|Basic (850-E): Setpoint Group Control, Virtual Inputs, Trip

Bus, Breaker Control, VTFF

|Standard (850-E): Basic + FlexLogic, CLP, 50BF (2/CT bank),

CT Supervision(3)

Standard (850-D): Setpoint Group Control, Virtual Inputs,

Trip Bus(6), Breaker Control (1/Bkr), VTFF (1/VT bank),

FlexLogic, CLP (1/Bkr), 50BF (2/CT bank), Pole

Discordance(3), Autoreclose (1/Bkr), CT Supervision(3)

|Advanced (850-E): Standard + Autoreclose, Bus Transfer

(requires voltage option P)

|Advanced HMI (850-E): Advanced + Tab PBs, Annunciator

Panel, Configurable SLDs with Bay Control

|Advanced (850-D): Standard + Tab PBs, Annunciator Panel,

Configurable SLDs with Bay Control

Monitoring B |

Basic: Breakers Coil Monitoring (1/Bkr), Breaker Arcing (1/

Bkr), THD, Current Demand (1/CT bank), Digital Counters

(16), Data Logger

C||||||| Standard: Basic + Advanced Breaker Health (1/Bkr)

A||||||| Advanced: Standard + Harmonic Detection(6)

1–10 850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL

850 ORDER CODES CHAPTER 1: INTRODUCTION

FASTPATH: Harsh Environment Coating is a standard feature on all 8 Series units.

Advanced security is only available with advanced communications (1E, 1P, 2A, 2E, 3A, 3E).

When the advanced communications option is selected, the Ethernet port on the main CPU

is disabled.

FASTPATH: Retrofit order codes must be configured using the GE Multilin Online Store (OLS) based on

the existing relay order code and additional requirements.

Navigate to https://www.gegridsolutions.com/multilin/catalog/850.htm and click Buy

Retrofit Kit for further information.

Accessories

• 18J0-0030 8 Series Depth Reducing Collar - 1 3/8"

• 18J0-0029 8 Series Depth Reducing Collar - 3"

• 8 Series Retrofit Kit, 750/760 to 850

• 8 Series Retrofit Kit, 735 to 850

892800A5.PDF

Communications S E |

|Standard: Front USB, 1 x Rear RS485: Modbus RTU, DNP3.0,

IEC60870-5-103 + 1 x Ethernet (Modbus TCP, DNP)

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, OPC-UA

1 P | | | | | Advanced + PRP

2 A |

|Advanced + IEC 61850

2 E | | | | | Advanced + PRP + IEC 61850

3 A |

|Advanced + Extended IEC 61850

3 E | | | | | Advanced + PRP + Extended IEC 61850

Advanced Communications Connector N |||| None

S|||| ST, Multi-mode 1310 nm

C|||| RJ45, Copper 10/100 M

Wireless Communication N | | | None

W | | | WiFi 802.11

Security B| | Basic

A| | Advanced: CyberSentry Level 1

Future Option N | Not Available

Retrofit Kit Option 1 Wye 750-850 Retrofit Kit, terminal block wiring assembly

for wye (for retrofit kit only)

2Delta 750-850 Retrofit Kit, terminal block wiring assembly

for delta (for retrofit kit only)

3Wye 735-850 Retrofit Kit, terminal block wiring assembly

for wye (for retrofit kit only)

4Delta 735-850 Retrofit Kit, terminal block wiring assembly

for delta (for retrofit kit only)

850  * * NN * * * * A * * * * * * * * * * * * N *

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