GE P24DM, Technical Manual

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If any of these LEDs are ON then they should be reset before proceeding with further testing. If the LEDs
successfully reset (the LED goes off), no testing is needed for that LED because it is obviously operational.
5.2.5 TEST ALARM AND OUT-OF-SERVICE LEDS
The alarm and out of service LEDs can be tested using the COMMISSION TESTS menu column.
1. Set the Test Mode cell to
Contacts Blocked
.
2. Check that the out of service LED illuminates continuously and the alarm LED flashes.
It is not necessary to return the Test Mode cell to
Disabled
at this stage because the test mode will be required
for later tests.
5.2.6 TEST TRIP LED
The trip LED can be tested by initiating a manual circuit breaker trip. However, the trip LED will operate during the
setting checks performed later. Therefore no further testing of the trip LED is required at this stage.
5.2.7 TEST USER-PROGRAMMABLE LEDS
To test these LEDs, set the Test LEDs cell to
Apply Test
. Check that all user-programmable LEDs illuminate.
5.2.8 TEST OPTO-INPUTS
This test checks that all the opto-inputs on the IED are functioning correctly.
The opto-inputs should be energised one at a time. For terminal numbers, please see the external connection
diagrams in the "Wiring Diagrams" chapter. Ensuring correct polarity, connect the supply voltage to the
appropriate terminals for the input being tested.
The status of each opto-input can be viewed using either the Opto I/P Status cell in the SYSTEM DATA column, or
the Opto I/P Status cell in the COMMISSION TESTS column.
A '1' indicates an energised input and a '0' indicates a de-energised input. When each opto-input is energised, one
of the characters on the bottom line of the display changes to indicate the new state of the input.
5.2.9 TEST OUTPUT RELAYS
This test checks that all the output relays are functioning correctly.
1. Ensure that the IED is still in test mode by viewing the Test Mode cell in the COMMISSION TESTS column.
Ensure that it is set to
Contacts Blocked
.
2. The output relays should be energised one at a time. To select output relay 1 for testing, set the Test Pattern
cell as appropriate.
3. Connect a continuity tester across the terminals corresponding to output relay 1 as shown in the external
connection diagram.
4. To operate the output relay set the Contact Test cell to
Apply Test
.
5. Check the operation with the continuity tester.
6. Measure the resistance of the contacts in the closed state.
7. Reset the output relay by setting the Contact Test cell to
Remove Test
.
8. Repeat the test for the remaining output relays.
9. Return the IED to service by setting the Test Mode cell in the COMMISSION TESTS menu to
Disabled
.
5.2.10 TEST SERIAL COMMUNICATION PORT RP1
You need only perform this test if the IED is to be accessed from a remote location with a permanent serial
connection to the communications port. The scope of this test does not extend to verifying operation with
P24xM Chapter 19 - Commissioning Instructions
P24xM-TM-EN-2.1 407