selinc SEL-751 Feeder Protection Relay Instruction Manual
- June 5, 2024
- SELINC
Table of Contents
selinc SEL-751 Feeder Protection Relay
Product Overview
- SELECT Power Supply With I/O (Slot A)
- SELECT Processor and Communications Card (Slot B) e SELECT I/O Expansion Card (Slot C: see table)
- SELECT I/O Expansion Card (Slot D: see table)
- SELECT I/O Expansion Card (Slot E: see table).
- SELECT 4ACI/3 AVI or 4ACI Card (SlotZ)
- Device Case
- Rear-Panel Mounting Screws
- Rear Panel
Refer to the Model Option Table on the SEL website for ordering details|
Rear-Panel Slot
---|---
Card Type| A| B| C| D| E| Z
SELECT PSIO/2 DI/3 DOa| ●| n/a| n/a| n/a| n/a| n/a
SELECT CPU/COMa| n/a| ●| n/a| n/a| n/a| n/a
SELECT EIA-232/EIA-485| n/a| n/a| ●| n/a| n/a| n/a
SELECT DeviceNet| n/a| n/a| ●| n/a| n/a| n/a
SELECT 3 DI/4 DO/1 AO (one card per relay)| n/a| n/a| ●| ●| ●| n/a
SELECT 4 DI/4 DO| n/a| n/a| ●| ●| ●| n/a
SELECT 4 DI/3 DO (1 Form B, 2 Form C)| n/a| n/a| ●| ●| ●| n/a
SELECT 8 DI| n/a| n/a| ●| ●| ●| n/a
SELECT 14 DI| n/a| n/a| ●| ●| ●| n/a
SELECT 8 DO| n/a| n/a| ●| ●| ●| n/a
SELECT 8 AI| n/a| n/a| ●| ●| ●| n/a
SELECT 4 AI/4 AO (one card per relay)| n/a| n/a| ●| ●| ●| n/a
SELECT 10 RTD| n/a| n/a| n/a| ●| n/a| n/a
SELECT 2 AVI/4 AFDI (MOT…x70x…)| n/a| n/a| n/a| n/a| ●| n/a
SELECT 2 AVI/4 AFDI (MOT…xL0x…)| n/a| n/a| n/a| n/a| ●| n/a
SELECT 2 AVI/7 DI (MOT…x7Xx…) where X = A to H| n/a| n/a| n/a| n/a| ●| n/a
Refer to the Model Option Table on the SEL website for ordering details|
Rear-Panel Slot
---|---
Card Type| A| B| C| D| E| Z
SELECT 2 AVI/7 DI (MOT…xLXx…) where X = A to H| n/a| n/a| n/a| n/a| ●| n/a
SELECT 8 AFDI (MOT…x77x…)| n/a| n/a| n/a| n/a| ●| n/a
SELECT 4 ACI/3 AVI (MOT…x81/82/83/85/86/87x…)| n/a| n/a| n/a| n/a| n/a| ●
SELECT 4 ACI/3 AVI (MOT…xL1/L2/L3/L5/L6/L7x…)| n/a| n/a| n/a| n/a| n/a| ●
SELECT 4 ACI/3 AVI LEA (MOT…x7Lx…)| n/a| n/a| n/a| n/a| n/a| ●
SELECT 4 ACI (MOT…xA1/A2/A3/A5/A6/A7x…)| n/a| n/a| n/a| n/a| n/a| ●
Refer to the SEL-751 Model Option Table (MOT) for power supply and CPU board
variants. The SEL-751 offers flexibility in tailoring I/O to your specific
application. The SEL-751 has six rear-panel slots, labeled as Slots A, B, C,
D, E, and Z. Slots A, B, and Z are base unit slots, each associated with a
specific function. Optional digital/analog I/O cards are available for the
SEL-751 in Slots C, D, and E. Optional communications cards are available only
for Slot C, an RTD card is available only for Slot D, voltage/current cards
(conventional or LEA inputs) or current only cards are available only on Slot
Z, and a voltage/arc-flash card or a voltage/7 digital inputs card is
available for Slot E. The previous figure and table show the slot allocations
for the cards.
Because installations differ substantially, the SEL-751 offers aa variety of
card configurations that provide options for an array of applications. Choose
the combination of option cards most suited for your application.
Dangers, Warnings, and Cautions
DANGER Disconnect or de-energize all external connections before opening
this device. Contact with hazardous voltages and currents inside this device
can cause electrical shock resulting in injury or death.
WARNING Have only qualified personnel service this equipment. If you are
not qualified to service this equipment, you can injure yourself or others, or
cause equipment damage.
WARNING To install an option card, the relay must be de-energized and
then re-energized. When re-energized, the relay will reboot. Therefore, de-
energize the protected equipment before installing the option card to prevent
damage to the equipment.
CAUTION Equipment components are sensitive to electrostatic discharge
(ESD). Undetectable permanent damage can result if you do not use proper ESD
procedures. Ground yourself, your work surface, and this equipment before
removing any cover from this equipment. If your facility is not equipped to
work with these components, contact SEL about returning this device and
related SEL equipment for service.
Card Installation for Slots C, D, E, and Z
Perform the following procedure to install or replace any one of the cards into Slots C, D, E, or Z of the base unit:
-
Save the settings and event report data before installing the new card in the relay.
-
Remove the power supply voltage q from terminals A01+ and A02–, and then remove the ground wire from the green ground screw.
-
Disconnect all the connection plugs.
-
Remove the eight screws on the rear i and remove the rear cover.
-
Remove the plastic filler plate covering the slot associated with the card being installed.
-
Insert the card in the correct slot. Make sure the contact fingers on the printed circuit board are bent at an approximate 130-degree angle relative to the board for proper electromagnetic interference protection.
-
Before reattaching the rear cover, check for and remove any foreign material that may remain inside the SEL-751 case.
-
Carefully reattach the rear cover.
-
Reinstall the eight screws that secure the rear cover to the case i.
-
Apply power supply voltage q to terminals A01+ and A02–, and reconnect the ground wire to the green ground screw. If you have a two-line display front panel, perform Step 11 through Step 19; if you have a touchscreen display front panel, proceed to Step 20.
-
If the card is in the proper slot, the front panel displays the following:
STATUS FAIL
X Card Failure
If you do not see this message and the ENABLED LED is turned on, the card was inserted in the wrong slot. Begin again at Step 2. -
Press the ESC pushbutton.
-
Press the Down Arrow pushbutton until STATUS is highlighted.
-
Press the ENT pushbutton.
The front panel displays the following:
STATUS
Relay Status -
Press the ENT pushbutton.
The front panel displays the following:
Serial Num 000000000000000000000000 -
Press the ENT pushbutton.
The front panel displays the following:
Confirm Hardware
Config (Enter) -
Press the ENT pushbutton.
The front panel displays the following:
Accept New Config? No Yes -
Select Yes and press the ENT pushbutton.
The front panel displays the following:
Config Accepted. Enter to Reboot -
Press ENT and proceed to Step 22.
-
Wait for the Device Status screen to appear, and then verify the new part number and tap Yes to confirm the new configuration.
-
Tap OK on the notification screen to reboot the relay.
-
Use the PART NO command from Access Level C to enter the exact part number of the relay after the relay restarts and the ENABLED LED is turned on to indicate the card was installed correctly. After reconfiguration, the relay updates the part number, except for the digits shown below. These digits remain unchanged, i.e., these digits retain the same character as before the reconfiguration. A communications card (DeviceNet or EIA-232/485) installed in Slot C will be reflected as an empty slot in the part number. A regular 4 DI/4 DO card and a hybrid 4 DI/4 DO card have the same device ID. When interchanging these two cards, the part number for the respective slots should be updated manually. Use the STATUS command to view the part number.
-
Update the side-panel drawing with the drawing sticker provided in the option card kit. If necessary, replace the rear panel with the one applicable for the card and attach the terminal marking label provided with the card to the rear-panel cover. Also, contact SEL for an updated product serial number label with the updated part number.
-
Reconnect all connection plugs, and add any additional wiring/connectors required by the new card.
Slot B CPU Card Replacement
Before replacing the Slot B card, do the following:
- Ensure that the card has the latest firmware from the factory.
- Review the firmware revision history for the changes that were made; note that new settings added, if any, might affect existing settings in the relay or its application.
- Save all the settings and event reports before replacing the card.
- If the IEC 61850 protocol option was used previously, verify that the IEC 61850 protocol is still operational after the replacement. If not, reenable it. Refer to Protocol Verification for Relays With
IEC 61850 Option in Appendix B: Firmware Upgrade Instructions of the instruction manual.
Perform the following steps to replace the existing CPU card with a new card.
- Turn off the power to the relay.
- Use a ground strap between yourself and the relay.
- Disconnect the terminal blocks and CT/PT wires.
- Remove the rear panel.
- Remove the card from its slot and insert the new card.
- Attach the rear panel (new if applicable) and reconnect the terminal blocks and CT/PT wires.
- Apply new side stickers to the relay.
- Turn on the relay and log in via the terminal emulation software.
- Issue the STA command and accept the new configuration.
- From Access Level 2, type CAL to enter Access Level C. Do not modify any settings other than those listed in this procedure. The default password for Access Level C is CLARKE.
- From Access Level C, issue the SET C command.
- Update the relay serial number and part number to the appropriate values, type END, and then save the settings.
- Issue the STA C command to reboot the relay.
- Issue the STA command to verify that the serial and part numbers of your relay are correct.
Slot A Power Supply Card
If you are replacing the power supply card, change the port number accordingly using the PART NO command from Access Level C. Install new side stickers on the relay.
2011–2022 Schweitzer Engineering Laboratories, Inc. All rights reserved. All trademarks are the property of their respective holders. SEL products appearing in this document may be covered by the U.S. and foreign patents. The information in this document is provided for informational use only and is subject to change without notice.