Commissioning; Testing; Channel Testing - GE L90 Instruction Manual
L90 line current differential system ur series
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- Instruction manual (900 pages) ,
- Communications manual (532 pages) ,
- Instruction manual (486 pages)
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11 COMMISSIONING
11 COMMISSIONING 11.1TESTING
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
verified by using the internal channel monitoring and the monitoring in the Channel Tests. All of the tests presented in this
section must be either OK or PASSED.
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:
MENTS
CURRENT DIFFERENTIAL
7.
Verify and record that both relays have established communications with the following status checks:
ACTUAL VALUES
STATUS
ACTUAL VALUES
STATUS
8.
Make the following setting change in both relays:
9.
Make the following setting change in both relays:
TESTING
CHANNEL TESTS
10. Initiate the Local Loopback Channel Tests by making the following setting change:
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:
TESTING
CHANNEL TESTS
12. Verify and record that the Local Loopback Test was performed properly with the following status check:
ACTUAL VALUES
STATUS
13. Make the following setting change in one of the relays:
TESTING
CHANNEL TESTS
14. Initiate the Remote Loopback Channel Tests by making the following setting change:
TESTING
CHANNEL TESTS
Expected result: The "Running Remote Loopback Test" message appears; within 60 to 100 sec. the "Remote Loop-
back Test PASSED" message appears for a few seconds and then changes to "No", signifying the
test successfully completed and communications with the 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
cations 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:
TESTING
CHANNEL TESTS
16. Verify and record the Remote Loopback Test was performed properly with the following status check:
ACTUAL VALUES
STATUS
GE Multilin
GROUPED ELEMENTS
"Enabled".
CURRENT DIFF FUNCTION:
CHANNEL TESTS
CHANNEL 1 STATUS
CHANNEL TESTS
CHANNEL 2 STATUS
TESTING
TEST MODE
LOCAL LOOPBACK TEST
LOCAL LOOPBACK CHANNEL NUMBER:
LOCAL LOOPBACK TEST
LOCAL LOOPBACK FUNCTION:
LOCAL LOOPBACK TEST
LOCAL LOOPBACK CHANNEL NUMBER:
CHANNEL TESTS
CHANNEL 1(2) LOCAL LOOPBACK STATUS
REMOTE LOOPBACK TEST
REMOTE LOOPBACK
REMOTE LOOPBACK FUNCTION:
–4
) or the channel is not established – check the communi-
REMOTE LOOPBACK TEST
CHANNEL TESTS
CHANNEL 1(2) REMOTE LOOPBACK STATUS:
L90 Line Current Differential System
11.1.1 CHANNEL TESTING
GROUP 1
CURRENT DIFFERENTIAL ELE-
: "OK"
: "OK" (If used)
: "Enabled".
"Yes"
REMOTE LOOPBACK CHANNEL NUMBER:
"Yes"
REMOTE LOOPBACK CHANNEL NUMBER:
11.1 TESTING
11
–4
). All tests are
"1"
"2"
: "OK"
"1"
"2"
"OK"
11-1
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