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Operations Log Listing
Listed in Table 7-2 are all of the possible operations records and their descriptions.
Table 7-2
Operations
Record Log
51P Trip
(
)
3I>
51N Trip
(
)
IN>
50P-1 Trip
(
)
3I>>1
50N-1 Trip
(
)
IN>>1
50P-2 Trip
(
)
3I>>2
50N-2 Trip
(
)
IN>>2
50P-3 Trip
(
)
3I>>3
50N-3 Trip
(
)
IN>>3
46 Trip
(
)
Insc>
27-1P Alarm
(
)
U<
79V Block
(
)
O->IU<
27-3P Alarm
(
)
3U<
External Trip
External Close
Breaker Opened
Breaker Closed
Recloser Lockout
MDT Close
Records
Definition
Indicates that the phase time overcurrent element, 51P has timed out and operated. It is possible that
this may not have been the actual tripping element.
Indicates that the ground time overcurrent element, 51N has timed out and operated. It is possible that
this may not have been the actual tripping element.
Indicates that the phase instantaneous overcurrent element, 50P-1 has timed out and operated. It is
possible that this may not have been the actual tripping element.
Indicates that the ground instantaneous overcurrent element, 50N-1 has timed out and operated. It is
possible that this may not have been the actual tripping element.
Indicates that the phase instantaneous overcurrent element, 50P-2 has timed out and operated. It is
possible that this may not have been the actual tripping element.
Indicates that the ground instantaneous overcurrent element, 50N-2 has timed out and operated. It is
possible that this may not have been the actual tripping element.
Indicates that the phase instantaneous overcurrent element, 50P-3 has operated. It is possible that
this may not have been the actual tripping element.
Indicates that the ground instantaneous overcurrent element, 50N-3 has operated. It is possible that
this may not have been the actual tripping element.
Indicates that the negative sequence time overcurrent element, 46 has timed out and operated. It is
possible that this may not have been the actual tripping element.
Indicates that the single phase undervoltage element, 27-1P, has operated. This log indicates only
that the programmable logical output, 27-1P, has operated.
Indicates that one or more phases of voltage fell below the 79V threshold setting. Will log a 79V Block
only during a reclose operation.
Indicates that the three phase voltage element, 27-3P, has operated. This log indicates only that
the programmable logical output, 27-3P, has operated.
Indicates that the DPU1500R saw the breaker open via the 52A and 52B Programmable Logic
inputs, but the relay did not cause the breaker to open.
Indicates that the DPU1500R saw the breaker close via the 52A and 52B Programmable Logic
inputs, but the relay did not cause the breaker to open.
Indicates that a "TRIP BREAKER" command was entered from the Operations Menu.
Indicates that a "CLOSE BREAKER" command was entered from the Operations Menu.
Indicates a recloser lockout state. See the Recloser Section for details on lockout conditions.
Indicates that a circuit breaker close was issued by the DPU1500R while it was in the MDT mode.
See the Multiple Device Trip (MDT) Sections for details on MDT tripping.
website:www.abb.com/papd
ABB Distribution Protection Unit 1500R
7-7
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