GE 750 User manual

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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QMI # 005094
UL # A3775

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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
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
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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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

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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

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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
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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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
Reverse Power .................................................................................................................................... 8-1
Conformity
EU Declaration of Conformity............................................................................................................ 8-3
Revision History
Release Dates ...................................................................................................................................... 8-4
Release Notes...................................................................................................................................... 8-4
GE Multilin Device Warranty
Warranty Statement ........................................................................................................................... 8-5

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INDEX

Getting Started
Important Procedures 750/760
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GE Multilin
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
manual are reviewed to help prevent personal injury,
equipment damage, and/or downtime.
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.
GE Multilin contact information and call center for product support:
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: [email protected]
Home Page: http://www.GEmultilin.com
CAUTIONWARNING
NOTE

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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 ZPHASE A CURRENT ZLAST 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 Xkey. When inside a sub-
menu, the WMESSAGE key returns to the previous sub-menu. The MESSAGE Tand
MESSAGE Skeys 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:

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1. Press the MENU key to display the header for the setpoints menu, then press the
MESSAGE Xkey 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 Tand MESSAGE Skeys to scroll through all the available setpoint page
headers.
Press the MESSAGE Xkey to enter the corresponding page. Press the MESSAGE T
and MESSAGE Skeys to scroll through the page headers until the required
message is reached. The end of a page is indicated by the message END OF
PAGE Sn, where nrepresents the number of the setpoints page.
2. Press the MENU key to display the header for the actual values menu, then press
the MESSAGE Xkey 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 Tand MESSAGE Skeys will scroll through all the
available actual values page headers.
Press the MESSAGE Xkey to enter the corresponding page. Press the MESSAGE T
and MESSAGE Skeys to scroll through the page headers until the required
message is reached. The end of a page is indicated by the message END OF
PAGE An, where nrepresents the number of the actual values page.
3. Select the actual values menu and press the MESSAGE Xkey to enter the first
page. Press the MESSAGE Tor MESSAGE Skeys until the A2 METERING page
appears.
4. Press the MESSAGE Xkey to display the first sub-page heading for Page 2 of
actual values.
Press the MESSAGE Tand MESSAGE Skeys to scroll the display up and down
through the sub-page headers. Pressing the WMESSAGE 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.
5. Press the MESSAGE Tkey until the DEMAND sub-page heading appears. At this
point, press the MESSAGE Xkey display the messages in this sub-page.
SETPOINTS [Z]
ACTUAL VALUES [Z]
TARGET MESSAGES [Z]
SETPOINTS [Z]
S1 RELAY SETUP
ACTUAL VALUES [Z]
A1 STATUS
ACTUAL VALUES [Z]
A2 METERING
CURRENT [Z]
DEMAND [Z]

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If instead you press the MESSAGE Skey, the display will return to the previous
sub-page heading; in this case,
6. When the symbols and [Z]appear on the top line, it indicates that additional
sub-pages are available and can be accessed by pressing the MESSAGE Xkey.
Pressing MESSAGE Xwhile at the Demand sub-page heading displays the
following:
Pressing the WMESSAGE key returns to the Demand sub-page heading.
7. Press the MESSAGE Xkey to display the actual values of this second sub-page.
Actual values messages and setpoints always have a colon 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.
The menu path to this value is shown as A2 METERING ZV DEMAND ZPHASE A
CURRENT ZLAST PHASE A CURRENT DEMAND. Setpoints and actual values messages
are referred to in this manner throughout the manual.
To summarize the above example, the A2 METERING ZV DEMAND ZPHASE A
CURRENT ZLAST PHASE A CURRENT DEMAND path representation describes the
following key-press sequence: press the MENU key until the actual values menu
header is displayed, then press the MESSAGE Xand MESSAGE Tkeys until the A2
METERING message is displayed, then press the MESSAGE Xand MESSAGE Tkeys
to display the DEMAND message, then press the MESSAGE Xkey to reach the
PHASE A CURRENT message, followed by MESSAGE Xone last time to display the
LAST PHASE A CURRENT DEMAND actual value.
8. Press the MESSAGE Tkey to display the next actual value message. Pressing the
MESSAGE Tor MESSAGE Skeys scrolls the display through all the actual value
displays in this second sub-page.
9. Pressing the WMESSAGE key reverses the process described above and returns
the display to the previous level.
10. Press the WMESSAGE key twice to return to the A2 METERING ZV DEMAND sub-page
header.
ENERGY [Z]
PHASE A [Z]
CURRENT
LAST PHASE A CURRENT
DEMAND: 0 A
MAX PHASE A CURRENT
DEMAND: 0 A
PHASE A [Z]
CURRENT
DEMAND [Z]

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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 example 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.
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
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 familiar 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
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 TRIP COUNTER [Z]
MESSAGE ARCING CURRENT [Z]MESSAGE TOTAL ARCING CURRENT
φA: 0kA2- cycle
MESSAGE TOTAL ARCING CURRENT
φB: 0kA2- cycle
NOTE

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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 setpoint access via the front
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 VAL U E Skey to increment the displayed value by the
step value, up to a maximum allowed and then wraps around to the minimum value.
Likewise, the VA L UE Tkey decrements the displayed value by the step value, down to
a minimum value and then wraps around to the maximum value.
For example:
1. Select the S2 SYSTEM SETUP ZV BUS VT SENSING ZNOMINAL VT SECONDARY VOLTAGE
setpoint message.
2. Press the 6, 3, decimal, and 9 keys. The display message will change as shown.
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
NOMINAL VT SECONDARY
VOLTAGE: 120.0 V
NOMINAL VT SECONDARY
VOLTAGE: 63.9 V

Changing Setpoints 750/760
Feeder Management Relay
Getting Started
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GE Multilin
message will momentarily appear as confirmation of the storing process. If
69.28 were entered, it would be automatically rounded to 69.3.
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 keys.
For example:
1. Move to the S2 SYSTEM SETUP ZV BUS VT SENSING ZVT CONNECTION TYPE setpoint
message.
2. Press the VALU E Skey until the “Delta” value is displayed as shown (in this
manual, setpoint values are always shown in double quotation marks).
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: 115 V
VT Ratio: 14400 / 115 = 125.2
To set the phase CT primary rating, modify the S2 SYSTEM SETUP ZCURRENT SENSING
ZPHASE CT PRIMARY setpoint as shown below.
Press the MENU key until the relay displays the setpoints menu header.
To set the ground CT primary rating, modify the S2 SYSTEM SETUP ZCURRENT SENSING
ZV GROUND CT PRIMARY setpoint as shown below.
NEW SETPOINT
STORED
VT CONNECTION TYPE:
Wye
VT CONNECTION TYPE:
Delta
NEW SETPOINT
STORED
SETPOINTS [Z]
Press MESSAGE X
SETPOINTS [Z]
S1 RELAY SETUP
Press MESSAGE T
SETPOINTS [Z]
S2 SYSTEM SETUP Press
MESSAGE X
CURRENT [Z]
SENSING Press
MESSAGE XPHASE CT PRIMARY:
1000 A
Press the VA L U E keys until 650 A is displayed, or
enter the value directly via the numeric keypad. PHASE CT PRIMARY:
650 A
Press the ENTER key to store the
setpoint. NEW SETPOINT
STORED

Changing Setpoints750/760
Feeder Management Relay
Getting Started
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1–8 GE Multilin
Press the MENU key until the relay displays the setpoints menu header.
To set the ground bus VT connection type, modify the S2 SYSTEM SETUP ZV BUS VT
SENSING ZVT CONNECTION TYPE setpoint as shown below.
Press the MENU key until the relay displays the setpoints menu header.
To set the secondary voltage, modify the S2 SYSTEM SETUP ZV BUS VT SENSING ZV
NOMINAL VT SECONDARY VOLTAGE setpoint as shown below.
SETPOINTS [Z]
Press MESSAGE X
SETPOINTS [Z]
S1 RELAY SETUP
Press MESSAGE T
SETPOINTS [Z]
S2 SYSTEM SETUP Press
MESSAGE X
CURRENT [Z]
SENSING Press
MESSAGE XPHASE CT PRIMARY:
1000 A
Press
MESSAGE TGND CT PRIMARY:
50 A
Press the VA L U E keys until 100 A is displayed, or
enter the value directly via the numeric keypad. GND CT PRIMARY:
100 A
Press the ENTER key to store the
setpoint. NEW SETPOINT
STORED
Press MENU
SETPOINTS [Z]
Press MESSAGE X
SETPOINTS [Z]
S1 RELAY SETUP
Press MESSAGE T
SETPOINTS [Z]
S2 SYSTEM SETUP Press
MESSAGE X
CURRENT [Z]
SENSING
Press
MESSAGE T
BUS VT SENSING [Z]Press
MESSAGE XVT CONNECTION TYPE:
Wye
Press the VA L U E keys until the value of “Delta”
appears on the display. VT CONNECTION TYPE:
Delta
Press the ENTER key to store the
setpoint. NEW SETPOINT
STORED

Changing Setpoints 750/760
Feeder Management Relay
Getting Started
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GE Multilin
Press the MENU key until the relay displays the setpoints menu header.
To set the VT ratio, modify the S2 SYSTEM SETUP ZV BUS VT SENSING ZV VT RATIO
setpoint as shown below.
Press the MENU key until the relay displays the setpoints menu header.
If an entered setpoint value is out of range, the relay displays the following
message:
Press MENU
SETPOINTS [Z]
Press MESSAGE X
SETPOINTS [Z]
S1 RELAY SETUP
Press MESSAGE T
SETPOINTS [Z]
S2 SYSTEM SETUP Press
MESSAGE X
CURRENT [Z]
SENSING
Press
MESSAGE T
BUS VT SENSING [Z]Press
MESSAGE XVT CONNECTION TYPE:
Wye
Press
MESSAGE TNOMINAL VT SECONDARY
VOLTAGE: 120.0 V
Press the VA L U E keys until 115.0 V is displayed, or
enter the value directly via the numeric keypad. NOMINAL VT SECONDARY
VOLTAGE: 115.0 V
Press the ENTER key to store the
setpoint. NEW SETPOINT
STORED
Press MENU
SETPOINTS [Z]
Press MESSAGE X
SETPOINTS [Z]
S1 RELAY SETUP
Press MESSAGE T
SETPOINTS [Z]
S2 SYSTEM SETUP Press
MESSAGE X
CURRENT [Z]
SENSING
Press
MESSAGE T
BUS VT SENSING [Z]Press
MESSAGE XVT CONNECTION TYPE:
Wye
Press
MESSAGE TNOMINAL VT SECONDARY
VOLTAGE: 120.0 V
Press
MESSAGE TVT RATIO:
120.0:1
Press the VA L U E keys until 125.2:1 is displayed, or
enter the value directly via the numeric keypad. VT RATIO:
125.2:1
Press the ENTER key to store the
setpoint. NEW SETPOINT
STORED
OUT-OF RANGE –
VALUE NOT STORED

Changing Setpoints750/760
Feeder Management Relay
Getting Started
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1–10 GE Multilin
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 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 S5 PROTECTION ZPHASE CURRENT ZPHASE TIME OVERCURRENT 1 ZV PHASE
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.
PHASE CT PRIMARY:
1000 A
Press HELP MIN: 1
MAX: 5000
Press HELP IN STEPS OF:
1
Press HELP PRESS [0]-[9] OR
[VALUE ST] TO EDIT
Press HELP PRESS [ENTER] TO
STORE NEW VALUE
Press HELP FOR FURTHER HELP
REFER TO MANUAL
Press HELP INTERNET ADDRESS
www.GEmultilin.com
Press HELP TECH SUPPORT
Tel: [phone]
Press HELP TECH SUPPORT
Fax: [phone]
PHASE TIME O/C 1
RELAYS (3-7): -----
PHASE TIME O/C 1
RELAYS (3-7): 3----
NEW SETPOINT
STORED

Application Example 750/760
Feeder Management Relay
Getting Started
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GE Multilin
Text Setpoints Text setpoints accept user-defined character strings as values. They may be
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 S3 LOGIC INPUTS ZV USER INPUT A ZUSER INPUT A NAME setpoint
message. The name of this user defined input will be changed in this example
from the generic “User Input A” to something more descriptive.
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.
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 Xkey 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.
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 elements that will be enabled. Prepare a list of protection
functions including the following information. By default, all the protection func-
tions 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
USER INPUT A NAME:
User Input A
USER INPUT A NAME:
ser Input A
USER INPUT A NAME:
Substation Monitor

Application Example750/760
Feeder Management Relay
Getting Started
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1–12 GE Multilin
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 sta-
tus 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 set-
ting 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.