ABB Distribution Protection Unit 1500R
7-7
Records
9/99
website:www.abb.com/papd
Operations Log Listing
Listed in Table 7-2 are all of the possible operations records and their descriptions.
Table 7-2
51P Trip
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.
51N Trip
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.
50P-1 Trip
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.
50N-1 Trip
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.
50P-2 Trip
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.
50N-2 Trip
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.
50P-3 Trip
Indicates that the phase instantaneous overcurrent element, 50P-3 has operated. It is possible that
this may not have been the actual tripping element.
50N-3 Trip
Indicates that the ground instantaneous overcurrent element, 50N-3 has operated. It is possible that
this may not have been the actual tripping element.
46 Trip
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.
27-1P Alarm
Indicates that the single phase undervoltage element, 27-1P, has operated. This log indicates only
that the programmable logical output, 27-1P, has operated.
79V Block
Indicates that one or more phases of voltage fell below the 79V threshold setting. Will log a 79V Block
only during a reclose operation.
27-3P Alarm
Indicates that the three phase voltage element, 27-3P, has operated. This log indicates only that
the programmable logical output, 27-3P, has operated.
External Trip
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.
External Close
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.
Breaker Opened
Indicates that a “TRIP BREAKER” command was entered from the Operations Menu.
Breaker Closed
Indicates that a “CLOSE BREAKER” command was entered from the Operations Menu.
Recloser Lockout
Indicates a recloser lockout state. See the Recloser Section for details on lockout conditions.
MDT Close
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.
Operations
Record Log
Definition
(
3I>
)
(
IN>
)
(
3I>>1
)
(
IN>>1
)
(
3I>>2
)
(
IN>>2
)
(
3I>>3
)
(
Insc>
)
(
U<
)
(
3U<
)
(
O->IU<
)
(
IN>>3
)
