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L90 Commissioning Tests; Channel Testing - GE UR Series Instruction Manual

Line differential relay.
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10 COMMISSIONING

10.9 L90 COMMISSIONING TESTS

The communications system transmits and receives data between two or three terminals for the 87L function. The system
is designed to work with multiple channel options including direct and multiplexed optical fiber, G.703, and RS422. The
speed is 64 Kbaud in a transparent synchronous mode with automatic synchronous character detection and CRC insertion.
The Local Loopback Channel Test verifies the L90 communication modules are working properly. The Remote Loopback
Channel Test verifies the communication link between the relays meets requirements (BER less than 10
All tests are verified by using the internal channel monitoring and the monitoring in the actual values CHANNEL STATUS
section. All of the tests presented in this section must be either OK or PASSED.
TEST PROCEDURES:
1.
Verify that a type "W" module is placed in slot 'W' in both relays (e.g. W7J).
2.
Interconnect the two relays using the proper media (e.g. single mode fiber cable) observing correct connection of
receiving (Rx) and transmitting (Tx) communications paths and turn power on to both relays.
3.
Verify that the Order Code in both relays is correct.
4.
Cycle power off/on in both relays.
5.
Verify and record that both relays indicate IN SERVICE on the front display.
6.
Make the following setting change in both relays:
ÖØ
GROUPED ELEMENTS
Ö
CURRENT DIFF FUNCTION:
7.
Verify and record that both relays have established communications with the following status checks:
ÖØ
ACTUAL VALUES
STATUS
ÖØ
ACTUAL VALUES
STATUS
8.
Make the following setting change in both relays:
9.
Make the following setting change in both relays:
ÖØ
TESTING
CHANNEL TESTS
10. Initiate the Local Loopback Channel Tests by making the following setting change:
ÖØ
TESTING
CHANNEL TESTS
Expected result : In a few seconds "Yes" should change to "Local Loopback Test PASSED" and then to "No", signify-
ing the test was successfully completed and the communication modules operated properly.
11. If Channel 2 is used, make the following setting change and repeat Step 10 for Channel 2 as performed for channel 1:
ÖØ
TESTING
CHANNEL TESTS
12. Verify and record that the Local Loopback Test was performed properly with the following status check:
ÖØ
ACTUAL VALUES
STATUS
13. Make the following setting change in both relays:
ÖØ
TESTING
CHANNEL TESTS
14. Initiate the Remote Loopback Channel Tests by making the following setting change:
ÖØ
TESTING
CHANNEL TESTS
Expected result : The "Running Remote Loopback Test" message appears; within 60 to 100 seconds the "Remote
Loopback Test PASSED" message appears for a few seconds and then changes to "No", signifying
the test was successfully completed and communications with the remote relay were successfully
established. The "Remote Loopback Test FAILED" message indicates that either the communication
link quality does not meet requirements (BER less than 10
check the communications link connections.
15. If Channel 2 is used, make the following setting change and repeat Step 14 for Channel 2 as performed for channel 1:
ÖØ
TESTING
CHANNEL TESTS
GE Power Management
ÖØ
GROUP 1
CURRENT DIFFERENTIAL ELEMENTS
"Enabled"
ÖØ
ÖØ
CHANNEL TESTS
CHANNEL 1 STATUS
ÖØ
ÖØ
CHANNEL TESTS
CHANNEL 2 STATUS
TESTING
ÖØ
LOCAL LOOPBACK TEST
ÖØ
LOCAL LOOPBACK TEST
ÖØ
LOCAL LOOPBACK TEST
ÖØ
ÖØ
CHANNEL TESTS
CHANNEL 1(2) LOCAL LOOPBACK STATUS
ÖØ
REMOTE LOOPBACK TEST
ÖØ
Ö
REMOTE LOOPBACK
ÖØ
REMOTE LOOPBACK TEST
L90 Line Differential Relay
10.9 L90 COMMISSIONING TESTS
Ö
CURRENT DIFFERENTIAL
: "OK"
: "OK" (If used)
Ö
: "Enabled"
TEST MODE
ÖØ
LOCAL LOOPBACK CHANNEL NUMBER:
ÖØ
LOCAL LOOPBACK FUNCTION:
ÖØ
LOCAL LOOPBACK CHANNEL NUMBER:
ÖØ
REMOTE LOOPBACK CHANNEL NUMBER:
REMOTE LOOPBACK FUNCTION:
–4
) or the channel is not established –
ÖØ
REMOTE LOOPBACK CHANNEL NUMBER:

10.9.1 CHANNEL TESTING

–4
).
"1"
"Yes"
"2"
: "OK"
"1"
"Yes"
"2"
10-43
10

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L90

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