GE DGP Series, Instruction Manual

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GE Power Management DGP Digital Generator Protection System 4-
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4 ACCEPTANCE TESTS 4.6 GENERAL RELAY TESTS
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4.6.4 T3: DIGITAL INPUT TESTS
This test checks all digital inputs of the relay. It is a convenient way to determine proper system connections
and verify the operation of all dual optically isolated digital inputs. All digital inputs should be between 35 and
300 V DC.
Protection can be enabled or disabled, as deemed necessary by the user.
1. Connect the relay as shown in Figure 4–4: DIGITAL INPUT TEST CONNECTIONS.
2. Apply DC across DI1 (BG8—BG7). Using the MMI and the INFORMATION–VALUES command, verify that
GEN = OFF-LINE.
3. Remove DC from DI1 (BG8—BG7). Using the MMI and the INFORMATION–VALUES command, verify
that GEN = ON-LINE.
4. Apply DC across DI2 (BG6—BG5). Using the MMI and the INFORMATION–VALUES command, verify that
INLET VLV=CLOSED.
5. Remove DC from DI2 (BG6—BG5). Using the MMI and the INFORMATION–VALUES command, verify
that INLET VLV=OPEN.
6. Apply DC across DI3 (BG4—BG3). Using the MMI and the INFORMATION–VALUES command, verify that
DIG IN 3 = CLOSE.
7. Remove DC from DI3 (BG4—BG3). Using the MMI and the INFORMATION–VALUES command, verify
that DIG IN 3 = OPEN.
8. Apply DC across DI4 (BG2—BG1). Using the MMI and the INFORMATION–VALUES command, verify that
DIG IN 4 = CLOSE.
9. Remove DC from DI4 (BG2—BG1). Using the MMI and the INFORMATION–VALUES command, verify
that DIG IN 4 = OPEN.
10. Apply DC across DI5 (BE4—BE3). Using the MMI and the INFORMATION–VALUES command, verify that
OSC TRIG = CLOSE.
NOTE: This input is not active on some models of DGP.
11. Remove DC from DI5 (BE4—BE3). Using the MMI and the INFORMATION–VALUES command, verify that
OSC TRIG = OPEN.
NOTE: This input is not active on some models of DGP.
12. Apply DC across DI6 (BE2—BE1). Using the MMI and the INFORMATION–VALUES command, verify that
DIG IN 6 (EXT VTFF) = CLOSE.
13. Remove DC from DI6 (BE2—BE1). Using the MMI and the INFORMATION–VALUES command, verify that
DIG IN 6 (EXT VTFF) = OPEN.