GE DGP Series Instruction Manual page 146

5.2 RELAY TESTS
5.2 RELAY TESTS
The DGP status is reported through the MMI, the non-critical alarm contact, and the critical alarm contact. If a
system error causes relaying functions to cease, the LED on the MMI turns red, a FAIL message is displayed,
and the critical alarm relay de-energizes. A failure that did not interrupt relaying is indicated by energization of
the non-critical alarm relay and a WARN message on the MMI display.
If a STATUS error is detected, see Section 6.3.5: SERVICING SYSTEM STATUS FAILURES on page 6–6 for
further information.
a) STATUS CHECK
1. Apply rated DC power and wait for initialization to complete, as indicated by the green LED.
2. Press the [INF] key. Then scroll with the arrow keys until the heading INF: STATUS is displayed.
3. Press the [ENT] key.
The display should read STATUS OK.
b) DISPLAY TEST
The MMI test is built into the software. It allows the user to test the keypad, the printer, and the display. If no
printer is to be used with your relay, then skip the printer port testing.
1. Apply rated DC power and wait for initialization to complete, as indicated by the green LED.
2. Press the [ACT] key. Then scroll with the arrow keys until the heading ACT: MMI TEST is displayed.
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3. Press the [ENT] key.
The display should show NEXT?.
4. Press the [1/Y] followed by the [ENT] key.
The display will change to LED TST?.
5. Press the [1/Y] followed by the [ENT] key.
If the green LED is on, it will be extinguished and the red LED will be lit. If the red LED is lit, it will be extin-
guished and the green LED will be lit. The target LEDs will then flash on/off 4 times. Then each Target LED
will be lit individually. When the test is over the target LEDs will be returned to their original state.
6. Next, the display will prompt for the keyboard test with KEYBRD TST?.
7. Press the [1/Y] key followed by the [ENT] key.
8. At this point the MMI is in the keyboard test. Press every key on the keypad, except for the [CLR] key. As
you press each key, verify that the display indicates the key that was pressed.
9. When all the keys have been checked, press the [CLR] key.
10. The display will prompt PRINTER TST?. If you do not have a printer, the press the [3/N] followed by the
[ENT] key. If you have a printer, press the [1/Y] followed by the [ENT] key.
The printout will be 40 characters, which include the alphabet, the numbers 0 through 9, as well as the ":",
"=", "/" and "." characters. Forty lines will be printed.
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DGP Digital Generator Protection System
5 PERIODIC TESTS
5.2.1 T1: RELAY STATUS & MMI
GE Power Management