GE 750, 760 Instruction Manual

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GE Industrial Systems

750/760

Feeder Management Relay

INSTRUCTION MANUAL

Software Revision: 7.0x

Manual P/N: 1601-0120-A5

Manual Order Code: GEK-106471D

Copyright © 2005 GE Multilin

GE Multilin

215 Anderson Avenue, Markham, Ontario
Canada L6E 1B3
Tel: [phone] Fax: [phone]
Internet: http://www.GEmultilin.com

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GE Multilin's Quality

Management System is

registered to ISO9001:2000

QMI # 005094

UL # A3775

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Tabl

e of Contents

Table of Contents

GETTING STARTED Important Procedures

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

Inspection Checklist............................................................................................................................ 1-1

Manual Organization ..........................................................................................................................1-2

Using the Relay

Menu Navigation ................................................................................................................................1-2

Panel Keying Example........................................................................................................................ 1-5

Changing Setpoints

Introduction ......................................................................................................................................... 1-5

The HELP Key......................................................................................................................................1-6

Numerical Setpoints........................................................................................................................... 1-6

Enumeration Setpoints....................................................................................................................... 1-7

Output Relay Setpoints ....................................................................................................................1-10

Text Setpoints ................................................................................................................................... 1-11

Application Example

Description ........................................................................................................................................ 1-11

S2 System Setpoints ........................................................................................................................ 1-19

S3 Logic Inputs Setpoints ................................................................................................................ 1-20

S5 Protection Setpoints....................................................................................................................1-21

Installation ......................................................................................................................................... 1-22

Commissioning

Feeder Management Relay

750/760

INTRODUCTION Overview

Description .......................................................................................................................................... 2-1

Theory of Operation

Description .......................................................................................................................................... 2-3

Current and Voltage Waveform Capture .......................................................................................... 2-3

Frequency Tracking ............................................................................................................................ 2-4

Phasors, Transients, and Harmonics................................................................................................. 2-4

Processing of AC Current Inputs .......................................................................................................2-4

Protection Elements............................................................................................................................ 2-4

Logic Inputs......................................................................................................................................... 2-4

Ordering

Order Codes ........................................................................................................................................ 2-6

Example Order Codes.........................................................................................................................2-6

Accessories..........................................................................................................................................2-6

Specifications

Applicability.........................................................................................................................................2-7

Inputs ................................................................................................................................................... 2-7

Measured Parameters ........................................................................................................................ 2-8

Protection Elements............................................................................................................................ 2-8

Monitoring Elements ........................................................................................................................ 2-10

Control Elements ..............................................................................................................................2-11

Outputs .............................................................................................................................................. 2-12

Output Relays.................................................................................................................................... 2-12

CPU .................................................................................................................................................... 2-12

Physical.............................................................................................................................................. 2-13

Testing ............................................................................................................................................... 2-13

Approvals .......................................................................................................................................... 2-14

INSTALLATION Mechanical Installation

GE Multilin

Drawout Case......................................................................................................................................3-1

Installation ........................................................................................................................................... 3-2

Unit Withdrawal and Insertion........................................................................................................... 3-3

Ethernet Connection ........................................................................................................................... 3-4

Rear Terminal Layout ......................................................................................................................... 3-5

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Feeder Management Relay

Electrical Installation

Phase Sequence and Transformer Polarity.......................................................................................3-8

Current Inputs ......................................................................................................................................3-8

Ground and Sensitive Ground CT Inputs ..........................................................................................3-8

Restricted Earth Fault Inputs ..............................................................................................................3-9

Zero Sequence CT Installation..........................................................................................................3-10

Voltage Inputs....................................................................................................................................3-10

Control Power ....................................................................................................................................3-11

Trip/Close Coil Supervision..............................................................................................................3-12

Logic Inputs........................................................................................................................................3-13

Analog Input.......................................................................................................................................3-13

Analog Outputs..................................................................................................................................3-13

Serial Communications.....................................................................................................................3-14

RS232 Communications....................................................................................................................3-16

IRIG-B..................................................................................................................................................3-17

INTERFACES Front Panel Interface

Description ...........................................................................................................................................4-1

Display..................................................................................................................................................4-1

LED Indicators

Description ...........................................................................................................................................4-1

750/760 Status LED Indicators............................................................................................................4-2

System Status LED Indicators ............................................................................................................4-3

Output Status LED Indicators .............................................................................................................4-4

Relay Messages

Keypad Operation................................................................................................................................4-5

Diagnostic Messages ..........................................................................................................................4-6

Self-Test Warnings..............................................................................................................................4-6

Flash Messages ...................................................................................................................................4-8

EnerVista 750/760 setup Software Interface

Overview ............................................................................................................................................4-10

Hardware............................................................................................................................................4-10

Installing the EnerVista 750/760 setup Software.............................................................................4-12

Connecting EnerVista 750/760 setup to the Relay

Configuring Serial Communications................................................................................................4-14

Using the Quick Connect Feature.....................................................................................................4-15

Configuring Ethernet Communications...........................................................................................4-16

Connecting to the Relay....................................................................................................................4-17

Working with Setpoints and Setpoint Files

Engaging a Device.............................................................................................................................4-18

Entering Setpoints.............................................................................................................................4-18

File Support........................................................................................................................................4-19

Using Setpoints Files.........................................................................................................................4-19

Upgrading Relay Firmware

Description .........................................................................................................................................4-24

Saving Setpoints To A File ...............................................................................................................4-24

Loading New Firmware.....................................................................................................................4-24

Advanced EnerVista 750/760 setup Features

Triggered Events ...............................................................................................................................4-25

Waveform Capture (Trace Memory)................................................................................................4-26

Data Logger........................................................................................................................................4-29

Event Recorder ..................................................................................................................................4-29

Modbus User Map.............................................................................................................................4-30

Viewing Actual Values ......................................................................................................................4-30

Using EnerVista Viewpoint with the 750/760

Plug and Play Example .....................................................................................................................4-31

Table of Contents750/760

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Table of Contents

SETPOINTS Overview

Setpoints Main Menu ......................................................................................................................... 5-1

Setpoint Entry Methods .....................................................................................................................5-4

Setpoint Access Security.................................................................................................................... 5-5

Common Setpoints............................................................................................................................. 5-5

Logic Diagrams ................................................................................................................................... 5-6

S1 Relay Setup

Passcode.............................................................................................................................................. 5-7

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

Clock...................................................................................................................................................5-10

Event Recorder.................................................................................................................................. 5-11

Trace Memory................................................................................................................................... 5-11

Data Logger....................................................................................................................................... 5-12

Front Panel ........................................................................................................................................ 5-13

Default Messages..............................................................................................................................5-14

User Text Messages .........................................................................................................................5-15

Clear Data .......................................................................................................................................... 5-15

Installation ......................................................................................................................................... 5-16

Mod 008 Upgrade ............................................................................................................................. 5-16

S2 System Setup

Current Sensing ................................................................................................................................5-17

Bus VT Sensing................................................................................................................................. 5-17

Line VT Sensing ................................................................................................................................ 5-18

Power System ................................................................................................................................... 5-18

FlexCurves™ ..................................................................................................................................... 5-18

S3 Logic Inputs

Overview............................................................................................................................................5-19

Logic Inputs Setup............................................................................................................................ 5-20

Breaker Functions ............................................................................................................................. 5-21

Control Functions.............................................................................................................................. 5-22

User Inputs ........................................................................................................................................ 5-23

Block Functions................................................................................................................................. 5-24

Block Overcurrent ............................................................................................................................. 5-25

Transfer Functions............................................................................................................................ 5-26

Reclose (760 Only) ............................................................................................................................ 5-27

Miscellaneous ................................................................................................................................... 5-27

S4 Output Relays

Relay Operation ................................................................................................................................ 5-27

Trip Relay...........................................................................................................................................5-29

Close Relay........................................................................................................................................5-30

Auxiliary Relays ................................................................................................................................ 5-31

Self-Test Warning Relay................................................................................................................... 5-32

S5 Protection

Overview............................................................................................................................................5-32

Time Overcurrent Curve Characteristics.........................................................................................5-33

Phase Current.................................................................................................................................... 5-37

Neutral Current ................................................................................................................................. 5-43

Ground Current................................................................................................................................. 5-48

Sensitive Ground .............................................................................................................................. 5-52

Negative Sequence........................................................................................................................... 5-59

Voltage............................................................................................................................................... 5-64

Frequency.......................................................................................................................................... 5-69

Breaker Failure .................................................................................................................................. 5-72

Reverse Power .................................................................................................................................. 5-73

S6 Monitoring

Current Level..................................................................................................................................... 5-74

Power Factor ..................................................................................................................................... 5-75

Fault Locator...................................................................................................................................... 5-77

Demand ............................................................................................................................................. 5-79

Analog Input...................................................................................................................................... 5-84

Analog Outputs................................................................................................................................. 5-87

Overfrequency...................................................................................................................................5-89

Feeder Management Relay

750/760

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Feeder Management Relay

Equipment..........................................................................................................................................5-90

Pulse Output ......................................................................................................................................5-96

S7 Control

Setpoint Groups ................................................................................................................................5-97

Synchrocheck...................................................................................................................................5-100

Manual Close Blocking....................................................................................................................5-102

Cold Load Pickup.............................................................................................................................5-104

Undervoltage Restoration...............................................................................................................5-106

Underfrequency Restore.................................................................................................................5-107

Transfer Scheme .............................................................................................................................5-108

Autoreclose (760 only) ....................................................................................................................5-122

S8 Testing

Output Relays ..................................................................................................................................5-133

Pickup Test.......................................................................................................................................5-134

Analog Outputs................................................................................................................................5-134

Simulation........................................................................................................................................5-135

Factory Service ................................................................................................................................5-138

ACTUAL VALUES Overview

Actual Values Main Menu...................................................................................................................6-1

A1 Status

Virtual Inputs........................................................................................................................................6-5

Hardware Inputs ..................................................................................................................................6-5

Last Trip Data.......................................................................................................................................6-6

Fault Locations.....................................................................................................................................6-6

Clock .....................................................................................................................................................6-7

Autoreclose (760 only) ........................................................................................................................6-7

A2 Metering

Metering Conventions.........................................................................................................................6-7

Current..................................................................................................................................................6-9

Voltage ...............................................................................................................................................6-10

Frequency...........................................................................................................................................6-11

Synchronizing Voltage ......................................................................................................................6-11

Power..................................................................................................................................................6-12

Energy ................................................................................................................................................6-13

Demand ..............................................................................................................................................6-13

Analog Input.......................................................................................................................................6-14

A3 Maintenance

Trip Counters .....................................................................................................................................6-15

Arcing Current....................................................................................................................................6-15

A4 Event Recorder

Event Records....................................................................................................................................6-16

Last Reset Date ..................................................................................................................................6-19

A5 Product Info

Technical Support .............................................................................................................................6-19

Revision Codes ..................................................................................................................................6-19

Calibration Dates ...............................................................................................................................6-20

Table of Contents750/760

COMMISSIONING Overview

Safety Precautions...............................................................................................................................7-1

Requirements.......................................................................................................................................7-1

Conventions .........................................................................................................................................7-2

Test Equipment....................................................................................................................................7-2

Installation Checks...............................................................................................................................7-3

Wiring Diagrams..................................................................................................................................7-3

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Table of Contents

Feeder Management Relay

750/760

Inputs/Outputs

Logic / Virtual Inputs 1 to 14 .............................................................................................................. 7-5

Virtual Inputs 15 to 20....................................................................................................................... 7-11

Output Relays.................................................................................................................................... 7-11

Metering

Current Metering............................................................................................................................... 7-11

Voltage Metering .............................................................................................................................. 7-12

Power Metering................................................................................................................................. 7-14

Demand Metering............................................................................................................................. 7-15

Analog Input Metering......................................................................................................................7-17

Protection Schemes

Setpoint Groups................................................................................................................................ 7-17

Phase Overcurrent ............................................................................................................................ 7-18

Neutral Overcurrent.......................................................................................................................... 7-23

Ground Overcurrent ......................................................................................................................... 7-26

Negative-Sequence Overcurrent and Voltage................................................................................ 7-27

Voltage............................................................................................................................................... 7-28

Frequency.......................................................................................................................................... 7-33

Breaker Failure .................................................................................................................................. 7-35

Reverse Power .................................................................................................................................. 7-36

Monitoring

Current Monitoring ........................................................................................................................... 7-36

Fault Locator...................................................................................................................................... 7-37

Demand Monitoring ......................................................................................................................... 7-38

Analog Inputs .................................................................................................................................... 7-39

Overfrequency Monitoring............................................................................................................... 7-40

Power Factor ..................................................................................................................................... 7-40

VT Failure...........................................................................................................................................7-40

Trip Coil Monitor............................................................................................................................... 7-41

Close Coil Monitor ............................................................................................................................ 7-41

Breaker Operation Failure................................................................................................................ 7-41

Arcing Current................................................................................................................................... 7-42

Analog Output Channels.................................................................................................................. 7-42

IRIG-B.................................................................................................................................................7-42

Pulse Output...................................................................................................................................... 7-42

Control Schemes

Setpoint Group Control.................................................................................................................... 7-42

Synchrocheck.................................................................................................................................... 7-44

Manual Close Feature Blocking .......................................................................................................7-47

Cold Load Pickup Blocking............................................................................................................... 7-48

Undervoltage Restoration................................................................................................................ 7-49

Underfrequency Restoration............................................................................................................ 7-52

Transfer Scheme............................................................................................................................... 7-53

Autoreclose (760 only)...................................................................................................................... 7-59

Placing the Relay In Service

Description ........................................................................................................................................ 7-63

On-Load Testing................................................................................................................................ 7-64

Dielectric Strength Testing............................................................................................................... 7-65

APPENDIX Relay Mods

Conformity

Revision History

GE Multilin Device Warranty

GE Multilin

Reverse Power .................................................................................................................................... 8-1

EU Declaration of Conformity............................................................................................................ 8-3

Release Dates......................................................................................................................................8-4

Release Notes......................................................................................................................................8-4

Warranty Statement ........................................................................................................................... 8-5

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Feeder Management Relay

INDEX

Table of Contents750/760

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Important Procedures

Feeder Management Relay

750/760

1 Getting Started

Important Procedures

Cautions and Warnings Please read this chapter to guide you through the initial setup of your new relay.

Before attempting to install or use the relay, it is
imperative that all WARNINGS and CAUTIONS in this

CAUTIONWARNING

manual are reviewed to help prevent personal injury,
equipment damage, and/or downtime.

Getting Started

Inspection Checklist • Open the relay packaging and inspect the unit for physical damage.

• View the rear nameplate and verify that the correct model has been ordered.

• Ensure that the following items are included:
– Instruction Manual
– GE EnerVista CD (includes software and relay documentation)
– mounting screws

• For product information, instruction manual updates, and the latest software
updates, please visit the GE Multilin website at http://www.GEmultilin.com

If there is any noticeable physical damage, or any of the contents listed are
missing, please contact GE Multilin immediately.

NOTE

GE Multilin contact information and call center for produc t su pport :

GE Multilin
215 Anderson Avenue
Markham, Ontario
Canada L6E 1B3

Telephone: [phone], toll-free 1-800-547-8629 (North America only)
Fax: [phone]
E-mail: [e-mail]
Home Page: http://www.GEmultilin.com

.

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1–1

Getting Started

Using the Relay750/760

Feeder Management Relay

Manual Organization Reading a lengthy instruction manual on a new product is not a task most people

enjoy. To speed things up, this introductory chapter provides a step-by-step tutorial
for a simple feeder application. Important wiring considerations and precautions
discussed in Electrical Installation on page 3–7 should be observed for reliable
operation. Detailed information regarding accuracy, output relay contact ratings,
and so forth are detailed in Specifications on page 2–7. The remainder of this
manual should be read and kept for reference to ensure maximum benefit from the
750 and 760. For further information, please consult your local sales representative
or the factory. Comments about new features or modifications for your specific
requirements are welcome and encouraged.

Setpoints and actual values are indicated as follows in the manual:

A2 METERING ZV DEMAND Z PHASE A CURRENT Z LAST PHASE A CURRENT DEMAND

This ‘path representation’ illustrates the location of an specific actual value or
setpoint with regards to its previous menus and sub-menus. In the example above,
the

LAST PHASE A CURRENT DEMAND actual value is shown to be a item in the Phase A

Current sub-menu, which itself is an item in the Demand menu, which is an item of
actual values page A2 Metering).

Sub-menu levels are entered by pressing the MESSAGE X key. When inside a sub­menu, the W MESSAGE key returns to the previous sub-menu. The MESSAGE T and
MESSAGE S keys are used to scroll through the settings in a sub-menu. The display
indicates which keys can be used at any given point. A summary of the menu
structure for setpoints and actual values can be found on pages 5–1 and 6–1,
respectively.

Using the Relay

Menu Navigation The relay has three types of display messages: actual values, setpoints, and target

messages.
Setpoints are programmable settings entered by the user. These types of

messages are located within a menu structure that groups the information into
categories. Navigating the menu structure is described below. A summary of the
menu structure for setpoints and actual values can be found in Setpoints Main Menu
on page 5–1 and Actual Values Main Menu on page 6–1, respectively.

Actual values include the following information:

1. The status of logic inputs (both virtual and hardware), last trip information,
fault location, and relay date and time.

2. Metering values measured by the relay, such as current, voltage, frequency,
power, energy, demand, and analog inputs.

3. Maintenance data. This is useful statistical information that may be used for
preventive maintenance. It includes trip counters and accumulated arcing
current.

4. Event recorder downloading tool.

5. Product information including model number, firmware version, additional
product information, and calibration dates.

6. Oscillography and data logger downloading tool.

7. A list of active conditions.

Alarms, trip conditions, diagnostics, and system flash messages are grouped under
Target messages.

Pressing the MENU key accesses the header of each the three main menus (for
setpoints, actual values, and target messages), displayed as follows:

1–2

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Using the Relay

Feeder Management Relay

750/760

 SETPOINTS [Z]

 ACTUAL VALUES [Z]

 TARGET MESSAGES [Z]

1. Press the MENU key to display the header for the setpoints menu, then press the

MESSAGE

X key to display the header of the first setpoints page. The setpoint

pages are numbered, have an ‘S’ prefix for easy identification, and have a name
which provides a general idea of the settings available in that page. Press the
MESSAGE T and MESSAGE S keys to scroll through all the available setpoint page
headers.

 SETPOINTS [Z]

S1 RELAY SETUP

Getting Started

Press the MESSAGE

X key to enter the corresponding page. Press the MESSAGE T

and MESSAGE S keys to scroll through the page headers until the required
message is reached. The end of a page is indicated by the message

PAGE Sn

, where n represents the number of the setpoints page.

END OF

2. Press the MENU key to display the header for the actual values menu, then press

the MESSAGE

X key to display the header for the first actual values page. The

actual values pages are numbered, have an ‘A’ prefix for easy identification and
have a name which gives a general idea of the information available in that
page. Pressing the MESSAGE T and MESSAGE S keys will scroll through all the
available actual values page headers.

 ACTUAL VALUES [Z]

A1 STATUS

Press the MESSAGE

X key to enter the corresponding page. Press the MESSAGE T

and MESSAGE S keys to scroll through the page headers until the required
message is reached. The end of a page is indicated by the message

PAGE An

3. Select the actual values menu and press the MESSAGE

page. Press the MESSAGE T or MESSAGE S keys until the

, where n represents the number of the actual values page.

X key to enter the first

A2 METERING page

END OF

appears.

 ACTUAL VALUES [Z]

A2 METERING

4. Press the MESSAGE

X key to display the first sub-page heading for Page 2 of

actual values.

 CURRENT [Z]

5. Press the MESSAGE T key until the

GE Multilin

Press the MESSAGE T and MESSAGE S keys to scroll the display up and down
through the sub-page headers. Pressing the

W MESSAGE key at any sub-page

heading will return the display to the heading of the corresponding setpoint or
actual value page, and pressing it again will return the display to the actual
values main menu header.

DEMAND sub-page heading appears. At this

point, press the MESSAGE

 DEMAND [Z]

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X key display the messages in this sub-page.

1–3

Feeder Management Relay

Using the Relay750/760

If instead you press the MESSAGE S key, the display will return to the previous
sub-page heading; in this case,

 ENERGY [Z]

Getting Started

6. When the symbols  and
sub-pages are available and can be accessed by pressing the MESSAGE
Pressing MESSAGE

X while at the Demand sub-page heading displays the

[Z] appear on the top line, it indicates that additional

X key.

following:

 PHASE A [Z]

CURRENT

Pressing the

7. Press the MESSAGE

W MESSAGE key returns to the Demand sub-page heading.

X key to display the actual values of this second sub-page.

Actual values messages and setpoints always have a col on separating the name
of the value and the actual value or setpoint. This particular message displays
the last Phase A current demand as measured by the relay.

LAST PHASE A CURRENT
DEMAND: 0 A

The menu path to this value is shown as

CURRENT Z LAST PHASE A CURRENT DEMAND. Setpoints and actual values messages

A2 METERING ZV DEMAND Z PHASE A

are referred to in this manner throughout the manual.
To summarize the above example, the

CURRENT Z LAST PHASE A CURRENT DEMAND path representation describes the

A2 METERING ZV DEMAND Z PHASE A

following key-press sequence: press the MENU key until the actual values menu
header is displayed, then press the MESSAGE

METERING

to display the

PHASE A CURRENT message, followed by MESSAGE X one last time to display the

LAST PHASE A CURRENT DEMAND actual value.

message is displayed, then press the MESSAGE X and MESSAGE T keys

DEMAND message, then press the MESSAGE X key to reach the

X and MESSAGE T keys until the A2

8. Press the MESSAGE T key to display the next actual value message. Pressing the
MESSAGE T or MESSAGE S keys scrolls the display through all the actual value

displays in this second sub-page.

MAX PHASE A CURRENT
DEMAND: 0 A

9. Pressing the
the display to the previous level.

10. Press the
header.

1–4

W MESSAGE key reverses the process described above and returns

 PHASE A [Z]

CURRENT

W MESSAGE key twice to return to the A2 METERING ZV DEMAND sub-page

 DEMAND [Z]

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Changing Setpoints

Feeder Management Relay

750/760

Panel Keying Example The following figure gives a specific example of how the keypad is used to navigate

through the menu structure. Specific locations are referred to throughout this
manual by using a ‘path representation’. The exam ple shown in the figure gives the
key presses required to read the total arcing current in phase B denoted by the path

A3 MAINTENANCE ZV ARCING CURRENT ZV TOTAL ARCING CURRENT ∅B.

Press the menu key until the relay displays the actual values page.

 ACTUAL VALUES [Z]

Press the MESSAGE key

 ACTUAL VALUES [Z]

A1 STATUS

Press the MESSAGE key

 ACTUAL VALUES [Z]

A2 METERING

Press the MESSAGE key

 ACTUAL VALUES [Z]

A3 MAINTENANCE

MESSAGE

MESSAGE

 TRIP COUNTER [Z]

 ARCING CURRENT [Z]

MESSAGE

MESSAGE

TOTAL ARCING CURRENT

φA: 0kA

TOTAL ARCING CURRENT

φB: 0kA

2

- cycle

2

- cycle

Getting Started

Changing Setpoints

Introduction There are several classes of setpoints, each distinguished by the way their values

are displayed and edited.
The relay's menu is arranged in a tree structure. Each setting in the menu is

referred to as a setpoint, and each setpoint in the menu may be accessed as
described in the previous section.

The settings are arranged in pages with each page containing related settings; for
example, all the Phase Time Overcurrent 1 settings are contained within the same
page. As previously explained, the top menu page of each setting group describes
the settings contained within that page. Pressing the MESSAGE keys allows the user to
move between these top menus. A complete editable setpoint chart is available as

NOTE

an Excel spreadsheet from the GE Multilin website at http://www.GEmultilin.com
All of the 750/760 settings fall into one of following categories: device settings,

system settings, logic input settings, output relay settings, monitoring settings,
control settings, and testing settings.

IMPORTANT NOTE: Settings are stored and used by the relay immediately
after they are entered. As such, caution must be exercised when entering
settings while the relay is in service. Modifying or storing protection
settings is not recommended when the relay is in service, since any
incompatibility or lack of coordination with other previously saved settings
may cause unwanted operations.

Now that we have become more fami liar with maneuvering through messages, we
can learn how to edit the values used by all setpoint classes.

Hardware and passcode security features are designed to provide protection against
unauthorized setpoint changes. Since we will be programming new setpoints using
the front panel keys, a hardware jumper must be installed across the setpoint

.

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1–5

Getting Started

Changing Setpoints750/760

Feeder Management Relay

access terminals (C10 and C11) on the back of the relay case. Attempts to enter a
new setpoint without this electrical connection will result in an error message.

The jumper does not restrict setpoint access via serial communications. The relay
has a programmable passcode setpoint, which may be used to disallow setpoint
changes from both the front panel and the serial communications ports. This
passcode consists of up to eight (8) alphanumeric characters.

The factory default passcode is “0”. When this specific value is programmed into the
relay it has the effect of removing all setpoint modification restrictions. Therefore,
only the setpoint access jumper can be used to restrict setpoi nt a cce s s via the fr ont
panel and there are no restrictions via the communications ports.

When the passcode is programmed to any other value, setpoint access is restricted
for the front panel and all communications ports. Access is not permitted until the
passcode is entered via the keypad or is programmed into a specific register (via
communications). Note that enabling setpoint access on one interface does not
automatically enable access for any of the other interfaces (i.e., the passcode must
be explicitly set in the relay via the interface from which access is desired).

A front panel command can disable setpoint access once all modifications are
complete. For the communications ports, writing an invalid passcode into the
register previously used to enable setpoint access disables access. In addition,
setpoint access is automatically disabled on an interface if no activity is detected for
thirty minutes.

The EnerVista 750/760 setup software incorporates a facility for programming the
relay's passcode as well as enabling and disabling setpoint access. For example,
when an attempt is made to modify a setpoint but access is restricted, the software
will prompt the user to enter the passcode and send it to the relay before the
setpoint is actually written to the relay. If a SCADA system is used for relay
programming, it is the programmer’s responsibility to incorporate appropriate
security for the application.

The HELP Key Pressing the HELP key displays context-sensitive information about setpoints such as

the range of values and the method of changing the setpoint. Help messages will
automatically scroll through all messages currently appropriate.

Numerical Setpoints Each numerical setpoint has its own minimum, maximum, and step value. These

parameters define the acceptable setpoint value range. Two methods of editing and
storing a numerical setpoint value are available.

The first method uses the 750/760 numeric keypad in the same way as any
electronic calculator. A number is entered one digit at a time with the 0 to 9 and
decimal keys. The left-most digit is entered first and the right-most digit is entered
last. Pressing ESCAPE before the ENTER key returns the original value to the display.

The second method uses the VA L U E S key to increment the displayed value by the
step value, up to a maximum allowed and then wr aps around to the minimum v alue.
Likewise, the VA L U E T key decrements the displayed value by the step va lue, down to
a minimum value and then wraps around to the maximum value.

For example:

1. Select the
setpoint message.

2. Press the 6, 3, decimal, and 9 keys. The display message will change as shown.

S2 SYSTEM SETUP ZV BUS VT SENSING Z NOMINAL VT SECONDARY VOLTAGE

NOMINAL VT SECONDARY
VOLTAGE: 120.0 V

NOMINAL VT SECONDARY
VOLTAGE: 63.9 V

3. Until the ENTER key is pressed, editing changes are not registered by the relay.
Therefore, press the ENTER key to store the new value in memory. This flash

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Changing Setpoints

Feeder Management Relay

750/760

message will momentarily appear as confirmation of the storing process. If

69.28 were entered, it would be automatically rounded to 69.3.

NEW SETPOINT
STORED

Enumeration Setpoints Enumeration setpoints have data values which are part of a set whose members are

explicitly defined by a name. A set is comprised of two or more members.
Enumeration values are changed using the VA L U E ke ys.

For example:

1. Move to the

message.

VT CONNECTION TYPE:
Wye

2. Press the VA L U E S key until the “Delta” value is displayed as shown (in this

manual, setpoint values are always shown in double quotation marks).

VT CONNECTION TYPE:
Delta

3. Press the ENTER key to store this change into memory. As before, confirmation of

this action will momentarily flash on the display.

The example shown in the following figures illustrates the key presses required to
enter system parameters such as the phase CT primary rating, ground CT primary
rating, bus VT connection type, secondary voltage, and VT ratio.

The following values will be entered:

Phase CT primary rating: 650 A
Ground CT primary rating: 100 A
Bus VT connection type: Delta
Secondary voltage: 1 15 V
VT Ratio: 14400 / 115 = 125.2

To set the phase CT primary rating, modify the

Z PHASE CT PRIMARY setpoint as shown below.

Press the MENU key until the relay displays the setpoints menu header.

S2 SYSTEM SETUP ZV BUS VT SENSING Z VT CONNECTION TYPE setp oint

NEW SETPOINT
STORED

S2 SYSTEM SETUP Z CURRENT SENSING

Getting Started

 SETPOINTS [Z]

Press

MESSAGE X

 SETPOINTS [Z]

S1 RELAY SETUP

Press

MESSAGE T

 SETPOINTS [Z]

S2 SYSTEM SETUP

To set the ground CT primary rating, modify the

ZV GROUND CT PRIMARY setpoint as shown below.

GE Multilin

Press

MESSAGE X

Press the

enter the value directly via the numeric keypad.

 CURRENT [Z]

SENSING

MESSAGE X

VA L U E keys unt il 650 A is displayed, or

Press the

ENTER key to store the

S2 SYSTEM SETUP Z CURRENT SENSING

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Press

setpoint.

PHASE CT PRIMARY:
1000 A

PHASE CT PRIMARY:
650 A

NEW SETPOINT
STORED

1–7

Getting Started

Feeder Management Relay

 SETPOINTS [Z]

Press

MESSAGE X

 SETPOINTS [Z]

S1 RELAY SETUP

Press

MESSAGE T

 SETPOINTS [Z]

S2 SYSTEM SETUP

Changing Setpoints750/760

Press the MENU key until the relay displays the setpoints menu header.

Press

MESSAGE X

Press the

enter the value directly via the numeric keypad.

 CURRENT [Z]

SENSING

Press

MESSAGE X

Press

MESSAGE T

VA L U E keys unt il 100 A is displayed, or

Press the

ENTER key to store the

setpoint.

PHASE CT PRIMARY:
1000 A

GND CT PRIMARY:
50 A

GND CT PRIMARY:
100 A

NEW SETPOINT
STORED

To set the ground bus VT connection type, modify the

SENSING Z VT CONNECTION TYPE setpoint as shown below.

Press the MENU key until the relay displays the setpoints menu header.

Press MENU

 SETPOINTS [Z]

Press

MESSAGE X

 SETPOINTS [Z]

S1 RELAY SETUP

Press

MESSAGE T

 SETPOINTS [Z]

S2 SYSTEM SETUP

To set the secondary voltage, modify the

NOMINAL VT SECONDARY VOLTAGE setpoint as shown below.

Press

MESSAGE X

Press

MESSAGE T

Press the

 CURRENT [Z]

SENSING

 BUS VT SENSING [Z] Press

MESSAGE X

VA L U E keys until the value of “Delta”

appears on the display.

Press the

ENTER key to store the

setpoint.

S2 SYSTEM SETUP ZV BUS VT SENSING ZV

S2 SYSTEM SETUP ZV BUS VT

VT CONNECTION TYPE:
Wye

VT CONNECTION TYPE:
Delta

NEW SETPOINT
STORED

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Changing Setpoints

 SETPOINTS [Z]

Press

 SETPOINTS [Z]

S1 RELAY SETUP

Press

 SETPOINTS [Z]

S2 SYSTEM SETUP

Press MENU

MESSAGE X

MESSAGE T

Feeder Management Relay

Press the MENU key until the relay displays the setpoints menu header.

Press

MESSAGE X

Press

MESSAGE T

Press the

enter the value directly via the numeric keypad.

 CURRENT [Z]

SENSING

 BUS VT SENSING [Z] Press

MESSAGE X

Press

MESSAGE T

VA L U E keys until 115.0 V is displayed, or

Press the

ENTER key to store the

setpoint.

VT CONNECTION TYPE:
Wye

NOMINAL VT SECONDARY
VOLTAGE: 120.0 V

NOMINAL VT SECONDARY
VOLTAGE: 115.0 V

NEW SETPOINT
STORED

750/760

Getting Started

To set the VT ratio, modify the
setpoint as shown below.

Press the MENU key until the relay displays the setpoints menu header.

Press MENU

 SETPOINTS [Z]

Press

MESSAGE X

 SETPOINTS [Z]

S1 RELAY SETUP

MESSAGE T

Press

 SETPOINTS [Z]

S2 SYSTEM SETUP

S2 SYSTEM SETUP ZV BUS VT SENSING ZV VT RATIO

Press

MESSAGE X

Press

MESSAGE T

 CURRENT [Z]

SENSING

 BUS VT SENSING [Z] Press

MESSAGE X

MESSAGE T

MESSAGE T

Press the

enter the value directly via the numeric keypad.

VA L U E keys until 125.2:1 is displayed, or

Press the

ENTER key to store the

Press

Press

setpoint.

VT CONNECTION TYPE:
Wye

NOMINAL VT SECONDARY
VOLTAGE: 120.0 V

VT RATIO:

120.0:1
VT RATIO:

125.2:1

NEW SETPOINT
STORED

If an entered setpoint value is out of range, the relay displays the following
message:

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OUT-OF RANGE –
VALUE NOT STORED

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1–9

Getting Started

Feeder Management Relay

Changing Setpoints750/760

To have access to information on maximum, minimum, step value, and information
on technical support, press the HELP key. For the previous example, pressing the HELP
key during setpoint entry displays the corresponding minimum, maximum and step
values for the displayed setpoint, as well as contact information if further assistance
is required.

For example, the help screens for the

PHASE CT PRIMARY:
1000 A

Press

Press

Press

Press

Press

Press

Press

Press

HELP

HELP

HELP

HELP

HELP

HELP

HELP

HELP

MIN: 1
MAX: 5000

IN STEPS OF:
1

PRESS [0]-[9] OR
[VALUE ST] TO EDIT

PRESS [ENTER] TO
STORE NEW VALUE

FOR FURTHER HELP
REFER TO MANUAL

INTERNET ADDRESS
www.GEmultilin.com

TECH SUPPORT
Tel: [phone]

TECH SUPPORT
Fax: [phone]

PHASE CT PRIMARY setpoint are shown below:

Output Relay Setpoints Each output relay setpoint has the Auxiliary Output Relays 3 to 7 associated with it.

Each can be toggled on or off individually, so that any combination of relays can be
activated upon detection of the initiating condition. Output relay configuration type
values are changed by using the 3 to 7 keys. Each key toggles the display between
the corresponding number and a hyphen.

1. Select the

TIME O/C 1 RELAYS (3-7) setpoint message.

2. If an application requires the Phase TOC protection element to operate the
Auxiliary Output 3 relay, select this output relay by pressing the ‘3’ key.

3. Press the ENTER key to store this change into memory. As before, confirmation of
this action will momentarily flash on the display.

The output relay setpoint values are represented by a 1-row, 5-column matrix.
For example, a value of “3---7” activates Auxiliary Relays 3 and 7, while a value
of “34567” activates all five auxiliary relays.

S5 PROTECTION Z PHASE CURRENT Z PHASE TIME OVERCURRENT 1 ZV PHASE

PHASE TIME O/C 1
RELAYS (3-7): -----

PHASE TIME O/C 1
RELAYS (3-7): 3----

NEW SETPOINT
STORED

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Application Example

Text Setpoints Text setpoints accept user-defined character strings as values. They may be

Feeder Management Relay

750/760

comprised of upper case letters, lower case letters, numerals, and a selection of
special characters. The editing and storing of a text value is accomplished with the
use of the ENTER, VA L U E , and ESCAPE keys.

For example:

1. Move to message

message. The name of this user defined input will be changed in this example
from the generic “User Input A” to something more descriptive.

USER INPUT A NAME:
User Input A

2. If an application is to be using the relay as a substation monitor, it is more

informative to rename this input ‘Substation Monitor’. Press the ENTER key and a
solid cursor () will appear in the first character position.

USER INPUT A NAME:
ser Input A

3. Press the VA L U E keys until the character “S” is displayed in the first position. Now

press the ENTER key to store the character and advance the cursor to the next
position. Change the second character to a “u” in the same manner. Continue
entering characters in this way until all characters the text “Substation Monitor”
are entered. Note that a space is selected like a character. If a character is
entered incorrectly, press the ENTER key repeatedly until the cursor returns to
the position of the error. Re-enter the character as required. Once complete,
press the MESSAGE X key to remove the solid cursor and view the result. Once a
character is entered by pressing the ENTER key, it is automatically saved in flash
memory as a new setpoint.

USER INPUT A NAME:
Substation Monitor

S3 LOGIC INPUTS ZV USER INPUT A Z USER INPUT A NAME setpoint

Getting Started

Application Example

Description The 750 and 760 relays contain many features designed to accommodate a wide

range of applications. This chapter is provided to guide you, the first time user,
through a real-world application. The following step-by-step installation example,
provides you with a quick and convenient way of becoming familiar with the relay.

The following example is only one of many possible applications of the 750/760
relay. Important points to keep in mind before developing settings for any
multifunction numerical relay like the 750/760 are as follows:

• Gather system data, including, but not limited to:

– CT primary and secondary ratings for all CTs used to feed the relay
– VT primary and secondary ratings for both the bus and line VTs
– System frequency
– System phase sequence

• Define the protection elemen ts that will be enabled. Prepare a list of protection

functions including the following information. By default, all the protection func­tions must be assumed Disabled:

– pickup parameter
– operating curve (if applicable)
– time dial or multiplier
– any additional intentional time delay
– directionality (if applicable)

• Define how many output contacts will be energized in response to a given pro-

tection function. Note that the 750/760 relay can be programmed to trip and, at

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Getting Started

Application Example750/760

Feeder Management Relay

the same time, to energize one, a combination, or all five auxiliary relays during
the process.

• Define if the output relays will be set as fail-safe type.

• Define if the 750/760 will be used to close the breaker. If that will be the case,
gather information on the conditions that will be used to verify synchronism.

• Define if the relay will be used to monitor the status of the breaker. It is strongly
recommended that the 750/760 always be programmed to monitor breaker sta­tus by means of a digital input connected to the one of the 750/760 logic inputs.
Use an auxiliary contact from the breaker either a normally open contact, 52a,
which is normally in open position when the breaker is open, or a normally
closed contact, 52b, which is in closed position when the breaker is open. A
combination of both can also be utilized, adding the capability for monitoring
pole discrepancy, an indication of a potential mechanical problem within the
main contact mechanism of the breaker.

• If the relay will be used to respond to logic inputs, prepare a list including:
– logic input name

– condition by which the logic input would be considered asserted
– function that the logic input will initiate within the 750/760.

• If the relay will be used to perform Monitoring functions and act upon certain
conditions, gather information such as:

– minimum and maximum values
– alarm and trip values
– time delays
– demand method to be used
– breaker timings

• It is important to familiarize yourself with the relay control functions before set­ting up the relay. Some control functions such as the Transfer scheme, which
takes automatic control of the auxiliary outputs, or the autorecloser that uses
the auxiliary outputs for specific pre-defined functions, can have an unwanted
effects in the performance of other functions within the relay.

To start, simply power on the unit, and follow the instructions in this tutorial. The
example assumes the following system characteristics. It also assumes that relay
setpoints are unaltered from their factory default values.

Refer to the following figures for schematics related to this application example.

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Application Example

Feeder Management Relay

750/760

Getting Started

FIGURE 1–1: Typical Three-Line Diagram

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1–13

Getting Started

Application Example750/760

Feeder Management Relay

FIGURE 1–2: Typical Connection Diagram

1–14

RS485 SERIAL NETWORK

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Application Example

Feeder Management Relay

750/760

Getting Started

FIGURE 1–3: Typical Control Diagram

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1–15

Getting Started

Application Example750/760

Feeder Management Relay

FIGURE 1–4: Typical Breaker Control Diagram

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Application Example

Feeder Management Relay

750/760

Getting Started

FIGURE 1–5: Typical Relay Control Diagram

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1–17

Getting Started

Feeder Management Relay

Application Example750/760

• Power System Data

a) System: 3
b) Frequency: 60 Hz
c) Line-to-line voltage: 13.8 kV
d) Maximum current: 600 A
The above data will be used to set the relay system parameters.

• Control System Requirements

a) All protection elements used are to trip the breaker.
b) Breaker position monitoring via 52b contact only.
c) Only current metering is required.
d) Contact Inputs: Remote open and close contacts from RTU.
e) Remote/local selection from panel hand switch. Reset from RTU.
f) Alarm after 100 second delay from substation monitor. This is normally used

to signal the remote center when someone has gained access to the substation.
g) Contact Outputs:

– Trip and close to breaker control circuit (trip and close relays).
– Relay failure alarm to RTU (self-test warning, no programming req’d).
– Alarm contact to RTU (setup in User Function for “Substation Monitor”)
– No data communications to other equipment.

The above data will be used to set the output relays to achieve breaker control
and to set digital inputs for breaker status, remote operations, remote status,
and alarm indication. The example assumes that the communications between
the station and the master control center will be done by the RTU. Alarms,
status indication, and breaker commands will be hard-wired from the relay to
the RTU. Please note that, similar information could be exchanged between the
RTU and the relay via an RS485 or RS422 serial link using Modbus R TU protocol.
Refer to GE Publication GEK-106473: 750/760 Communications Guide for
additional information.

• Instrument Transformer Data

a) Bus VTs: 2 × Delta connected, ratio = 14.4 kV:120 V
b) Phase CTs: 3 × Wye connected, ratio = 600:5 A
The above data will be used to set the relay system parameters, such as CT and

VT connections, VT secondary voltage, and CT and VT primary to secondary
ratios.

•Phase Protection Settings

a) Time Overcurrent 1 (51P1): Curve Shape = Moderately Inverse; Pickup =

840 A; Multiplier = 20.2

b) Instantaneous Overcurrent 1 (50P1): Pickup = 840 A; Phases Required =

Any Two; Delay = 0 s

c) Instantaneous Overcurrent 2 (50P2): Pickup = 10100 A; Phases Required =

Any Two; Delay = 0 s

• Neutral Protection Settings

a) Time Overcurrent 1 (function 51N1):

– Curve shape = Moderately Inverse
– Pickup = 120 A
– Multiplier = 10

b) Instantaneous Overcurrent 1 (function 50N1):

– Pickup = 120 A
– Phases required = Any two
– Delay = 0 seconds

Φ, 4 wire

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GE Multilin

Application Example

Feeder Management Relay

c) Instantaneous Overcurrent 2 (function 50N2):

– Pickup = 2000 A
– Phases required = Any two
– Delay = 0 seconds

The above data will be used to configure the relay protection. In this example,
the relay will be used for Phase and Neut r al Overcurrent protection only; t hat is,
functions 51P1, 50P1, 50P2, 51N1, 50N1, and 50N2.

In this manual, Neutral Overcurrent is to the residual current, calculated from
the currents measured at the phase CT inputs: terminals G7-H7 for phase A,
G8-H8 for phase B and G9-H9 for phase C. Since it is a calculated value, it
cannot be used to generate oscillography. Ground Overcurrent refers to the
current measured at terminals G10-H10, or at terminals G3-H3 for Sensitive
Ground Overcurrent, when the relay is fitted to measure sensitive ground
current.

You should now be familiar with maneuvering through and editing setpoints. As
such, we will now limit our discussion to just the values that must be programmed,
in order to meet the requirements of the example application. Any setpoints not
explicitly mentioned should be left at the factory default value.

S2 System Setpoints The S2 setpoints page contains setpoints for entering the characteristics of the

equipment on the feeder electrical syst em. I n our ex ample, these c har acteris tics are
specified under the Power System Data and Instrument Transformer Data headings
in the previous sub-section. From this information and the resulting calculations,
program the page S2 setpoints as indicated.

For current transformers, make the following change in the

CURRENT SENSING setpoints page:

PHASE CT PRIMARY: “600 A”

Since the example does not contemplate a ground CT, the setpoints for

PRIMARY, and SENSTV GND CT can be left unchanged. For additional information refer

to Current Sensing on page 5–17.
For voltage transformers, make the following changes in the

BUS VT SENSING setpoints page:

VT CONNECTION TYPE: “Delta”
NOMINAL VT SECONDARY VOLTAGE: “115.0 V”

(for a 138 kV system, 13.8 kV / 120 = 115 V)

VT RATIO: “120:1” (14.4 kV VT

primary

/ 120 V VT

secondary

For the case where Bus VTs are connected in Wye, the system settings are:

VT CONNECTION TYPE: “Wye”
NOMINAL VT SECONDARY VOLTAGE: “66.4 V” (the phase-to-neutral voltage must be

entered. For a 13.8 kV system, we have 13.8kV ø-ø

7.97kV / 120 = 66.4 V)

VT RATIO: “120:1” (14.4 kV VT

primary

/ 120V VT

secondary

For additional information, refer to Bus VT Sensing on page 5–17.
The 750/760 was designed to display primary system values. Current and voltage

measurements are performed at secondary levels, which the relay transforms to
primary values using CT and VT ratios, as well as nominal secondary values.

Configuring the relay for current measurement is simple and it only requires setting
the CT ratios. CT inputs can be 1 A or 5 A and must be specified when the relay is
purchased. There is additional flexibility with regards to the VT inputs, as nominal
values are not required before the relay is ordered; therefore, more settings are
needed to prepare the relay for voltage measurements.

Make the following change in the

S2 SYSTEM SETUP ZV POWER SYSTEM setpoints page

to reflect the power system:

NOMINAL FREQ: “60 Hz”

For additional information, refer to Power System on page 5–18.

S2 SYSTEM SETUP Z

S2 SYSTEM SETUP ZV

)

≡ 7.97kV ø-N; therefore,

)

750/760

Getting Started

GND CT

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Feeder Management Relay

Application Example750/760

Getting Started

S3 Logic Inputs

Setpoints

The S3 setpoints page is for entering the characteristics of the logic inputs. In our
example, these characteristics are specified under the Control System Requirements
heading. Program the S3 setpoints as indicated.

To properly configure the relay to respond to digital inputs, they need to be defined
as follows:

1. The digital inputs should be re-named. Changing the default names to meaning­ful names is strongly recommended so they can be easily identified in the LCD
and in event reports.

2. The asserted logic must be identified. Refer to S3 Logic Inputs on page 5–19 for
additional information.

3. The functionality of the logic inputs must be defined. Note that a logic input can
be utilized for more then one application.

If step 3 is not done, the relay will not perform any function, even if the logic input
is defined and the asserted logic is met. The last two steps use the following
setpoints pages:

•

S3 LOGIC INPUTS ZV BREAKER FUNCTIONS for breaker status.

•

S3 LOGIC INPUTS ZV CONTROL FUNCTIONS for local/remote operations, cold load

pick up, and setpoint group changes.

•

S3 LOGIC INPUTS ZV USER INPUTS to energize output relays adding time delay.

•

S3 LOGIC INPUTS ZV BLOCK FUNCTION to block protection functions other than

overcurrent functions

•

S3 LOGIC INPUTS ZV BLOCK OC FUNCTIONS to block overcurrent functions.

•

S3 LOGIC INPUTS ZV TRANSFER FUNCTIONS to set inputs that will work with the

automatic transfer scheme.

•

S3 LOGIC INPUTS ZV RECLOSER FUNCTIONS (760 relay only) to set inputs to work

with the autorecloser functions.

•

S3 LOGIC INPUTS ZV MISC FUNCTIONS to trigger oscillography, fault simulation, and

start demand intervals.

For breaker position monitoring, enter the following values in the

LOGIC INPUTS SETUP page:

INPUT 2 NAME: “Brkr Position (52b)”
INPUT 2 ASSERTED LOGIC: “Contact Close”

Then, to define the functionality of the logic input, enter the following value in the

LOGIC INPUTS ZV BREAKER FUNCTIONS setpoint page:

52B CONTACT: “Input 2”

S3 LOGIC INPUTS Z

S3

For the Remote Open/Close and Reset RTU contacts, enter the following values in
the

S3 LOGIC INPUTS Z LOGIC INPUTS SETUP setpoints page to define the logic inputs.

Using the MESSAGE T key, find the appropriate logic name message and then define
the logic input asserted logic to complete the logic input definition as follows:

INPUT 3 NAME: “Local Mode”
INPUT 3 ASSERTED LOGIC: “Contact Close”
INPUT 4 NAME: “Remote Open”
INPUT 4 ASSERTED LOGIC: “Contact Close”
INPUT 5 NAME: “Remote Close”
INPUT 5 ASSERTED LOGIC: “Contact Close”
INPUT 6 NAME: “Reset”
INPUT 6 ASSERTED LOGIC: “Contact Close”

Once the Logic Input definitions are completed, it is necessary to define their
functionality by entering the following values in the

FUNCTIONS setpoint page. Using the MESSAGE T key, locate the appropriate logic

S3 LOGIC INPUTS ZV CONTROL

function and select the corresponding logic input to perform the function.

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Application Example

750/760

Feeder Management Relay

LOCAL MODE: “Input 3”
RESET: “Input 6”
REMOTE OPEN: “Input 4”
REMOTE CLOSE: “Input 5”

If, for example, the same logic input would be needed to perform the functionality of
Close and Reset, then the following should have been entered:

RESET: “Input 5”
REMOTE CLOSE: “Input 5”

To setup an Alarm-after-Delay input, make the following changes to the

INPUTS ZV USER INPUT A setpoints page. Press the MESSAGE T key after each setpoint

S3 LOGIC

is completed to move to the next message.

USER INPUT A NAME: “Substation Monitor”
USER INPUT A SOURCE: “Input 1”
USER INPUT A FUNCTION: “Alarm”
USER INPUT A RELAYS (3-7): “3----”
USER INPUT A DELAY: “100.00 s”

S5 Protection Setpoints The S5 Protection setpoints page contains setpoints for entering protection element

characteristics. In our example, these characteristics are specified under the

PROTECTION Z PHASE CURRENT and S5 PROTECTION Z NEUTRAL CURRENT headings. From

this data and the resulting calculations, program the page S5 setpoints as indicated.
When setting the relay for the first time, other setpoints not listed in this example
will be left disabled.

For the Phase Time Overcurrent 1 element, enter the following values in the

PROTECTION Z PHASE CURRENT Z PHASE TIME OVERCURRENT 1 page. Press the MESSAGE T

key after each setpoint is completed to move to the next message.

PHASE TIME OC 1 FUNCTION: “Trip”
PHASE TIME OC 1 PICKUP: “1.40 x CT” (calculated as 840 A pickup / 600 A primary)
PHASE TIME OC 1 CURVE: “Mod Inverse”
PHASE TIME OC 1 MULTIPLIER: “20.20”
PHASE TIME OC 1 RESET: “Instantaneous”

For the Phase Instantaneous Overcurrent 1 element, enter the following values in
the

S5 PROTECTION Z PHASE CURRENT ZV PHASE INST OVERCURRENT 1 setpoints page.

Press the MESSAGE T key after each setpoint is completed to move to the next
message.

PHASE INST OC 1 FUNCTION: “Trip”
PHASE INST OC 1 PICKUP: “1.40 x CT” (calculated as 840 A pickup / 600 A primary)
PHASE INST OC 1 DELAY: “0.00 s”
PHASES REQUIRED FOR OPERATION: “Any Two”

For the Phase Instantaneous Overcurrent 2 element, enter the following values in
the

S5 PROTECTION Z PHASE CURRENT ZV PHASE INST OVERCURRENT 2 setpoints page.

Press the MESSAGE T key after each setpoint is completed to move to the next
message.

PHASE INST OC 2 FUNCTION: “Trip”
PHASE INST OC 2 PICKUP: “16.83 x CT” (from 10100 A pickup / 600 A primary)
PHASE INST OC 2 DELAY: “0.00 s”
PHASES REQUIRED FOR OPERATION: “Any Two”

For the Neutral Time Overcurrent 1 element, enter the following values in the

PROTECTION ZV NEUTRAL CURRENT Z NEUTRAL TIME OVERCURRENT 1 page. Press the

MESSAGE T key after each setpoint is completed to move to the next message.

NEUTRAL TIME OC 1 FUNCTION: “Trip”
NEUTRAL TIME OC 1 PICKUP: “0.20 x CT” (from 120 A pickup / 600 A primary)
NEUTRAL TIME OC 1 CURVE: “Mod Inverse”
NEUTRAL TIME OC 1 MULTIPLIER: “10.00”
NEUTRAL TIME OC 1 RESET: “Instantaneous”

Getting Started

S5

S5

S5

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Getting Started

Feeder Management Relay

Commissioning750/760

For the Neutral Instantaneous Overcurrent 1 element, enter the following values in
the

S5 PROTECTION ZV NEUTRAL CURRENT ZV NEUTRAL INST OVERCURRENT 1 setpoints

page. Press the MESSAGE T key after ea ch se tp oint is co mp lete d t o move to th e nex t
message.

NEUTRAL INST OC 1 FUNCTION: “Trip”
NEUTRAL INST OC 1 PICKUP: “0.20 x CT” (from 120 A pickup / 600 A primary)
NEUTRAL INST OC 1 DELAY: “0.00 s”

For the Neutral Instantaneous Overcurrent 2 element, enter the following values in
the

S5 PROTECTION ZV NEUTRAL CURRENT ZV NEUTRAL INST OVERCURRENT 2 setpoints

page. Press the MESSAGE T key after ea ch se tp oint is co mp lete d t o move to th e nex t
message.

NEUTRAL INST OC 2 FUNCTION: “Trip”
NEUTRAL INST OC 2 PICKUP: “3.33 x CT” (from 2000 A pickup / 600 A primary)
NEUTRAL INST OC 2 DELAY: “0.00 s”

The Ground Overcurrent element is disabled by entering the following values in the

S5 PROTECTION ZV GROUND CURRENT ZV GROUND TIME OVERCURRENT setpoints page:

GROUND TIME O/C FUNCTION: “Disabled”
GROUND INST O/C FUNCTION: “Disabled”

The Negative Sequence Overcurrent elements is disabled by entering the following
value s in the

NEG SEQ TIME OVERCURRENT Z NEG SEQ TIME OC FUNCTION: “Disabled”
NEG SEQ INST OVERCURRENT Z NEG SEQ INST OC FUNCTION: “Disabled”

S5 PROTECTION ZV NEGATIVE SEQUENCE setpoints page:

Installation Now that programming for the sample application is complete, the relay should be

put in the Ready state. Note that the relay is defaulted to the Not Ready state when
it leaves the factory. A minor self-test warning message informs the user that the
750/760 has not yet been programmed. If this warning is ignored, protection is
active and will be using factory default setpoints. The Relay In Service LED Indicator
will be on.

The following message indicates that the relay is in the Not Ready state:

SELF-TEST WARNING
Relay Not Ready

Move to the
put the relay in the Ready state, press the VA L U E S key until the
displayed and press ENTER. Enter “Yes” at the
Service LED Indicator will now turn on and the

Ready

S1 RELAY SETUP ZV INSTALLATION Z 750 OPERATION setpoint message. To

READY message is

ARE YOU SURE? prompt. The Relay In

SELF TEST WARNING: Relay Not

diagnostic message will disappear.

Commissioning

Extensive commissioning tests are available in Chapter 7: Commissioning.
Commissioning tables for recording required settings are available in Microsoft Excel
format from the GE Multilin website at http://www.GEmultilin.com
contains additional technical papers and FAQs relevant to the 750/760 Feeder
Management Relay.

. The website also

1–22

http://www.GEmultilin.com

GE Multilin