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2.4 Trip Signal Output
GRD150 provides various trip and alarm signal outputs such as three-phase and single-phase trip
and alarm of each protection. Figures 2.4.1 to 2.4.3 show gathered trip and alarm signals of each
protection.
GRD150 provides 8 to 32 auxiliary relays for binary outputs as described in Section 3.2. These
auxiliary relays can be assigned to any protection outputs by PLC function. (Refer to Section 2.7.)
After the trip signal disappears by clearing the fault, the reset time of the tripping output relay can
be programmed by PLC function. The setting is respective for each output relay.
When the relay is latched, it can be reset with the RESET key on the relay front panel or a binary
input by PLC signal. This resetting resets all the output relays collectively.
In the tripping output relay, it must be checked that the tripping circuit is opened with a circuit
breaker auxiliary contact prior to the tripping output relay resetting, in order to prevent the
tripping output relay from directly interrupting the circuit breaker tripping coil current.
OC1 TRIP
OC2 TRIP
OC3 TRIP
DOC1 TRIP
DOC2 TRIP
DOC3 TRIP
EF1 TRIP
EF2 TRIP
EF3 TRIP
DEF1 TRIP
DEF2 TRIP
DEF3 TRIP
SEF1 TRIP
SEF2 TRIP
SEF3 TRIP
DSEF1 TRIP
DSEF2 TRIP
DSEF3 TRIP
NOC1 TRIP
DNOC1 TRIP
UC1 TRIP
THM TRIP
BCD TRIP
OV1 TRIP
UV1 TRIP
ZOV1 TRIP
NOV1 TRIP
FRQ1 TRIP
DFRQ1 TRIP
FRQ2 TRIP
DFRQ2 TRIP
FRQ3 TRIP
DFRQ3 TRIP
FRQ4 TRIP
DFRQ4 TRIP
FRQ5 TRIP
DFRQ5 TRIP
FRQ6 TRIP
DFRQ6 TRIP
≥1
≥1
≥1
≥1
FRQ_S1_TRIP
1680
≥1
FRQ_S2_TRIP
≥1
1681
FRQ_S3_TRIP
1682
≥1
FRQ_S4_TRIP
1683
≥1
FRQ_S5_TRIP
1684
≥1
FRQ_S6_TRIP
1685
≥1
By PLC
2.4.1 Three-phase Tripping Output
⎯
⎯
92
6 F 2 S 0 8 4 2
485
≥1
GEN. TRIP
478
≥1
FRQ. TRIP
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