ABB Distribution Protection Unit 1500R
6-7
Programmable Input and Output Contacts
9/99
website:www.abb.com/papd
BFA:
Breaker Failure Alarm. BFA operates when the DPU1500R detects a breaker failed to trip.
See Section 2 under “Trip Fail Timer” for details.
BFA*:
Breaker Failure seal-in Alarm. See Logical Output Types Section.
TCFA:
Trip Circuit Failure Alarm. TCFA is activated when the DPU1500R determines that the circuit
breaker trip coil continuity has been broken. It is directly tied to the operation of the logical
input TCM. When TCM is a logical 0, the Trip Circuit Fail Alarm (TCFA) is a logical 1 indicating
a trip coil failure.
79LOA:
Recloser Lockout Alarm. 79LOA operates at any time when the DPU1500R recloser is in the
lockout state. When 79LOA is a logical 1, the recloser is in lockout.
TCC:
Tap Changer Cutout Contact. TCC operates when the DPU1500R recloser begins operation
and remains active until the last recloser operation is complete (reset time expires or recloser
enters lockout state). When TCC is a logical 1, the recloser in the DPU1500R is active. TCC
can be used to block a tap changer during fault and recovery operations.
PUA:
Overcurrent Pickup Alarm. PUA operate when any enabled overcurrent element is above its
specific pickup level. Since PUA is an OR of all enabled overcurrent elements, it does not
distinguish between elements. In other words, it will operate for the lowest set overcurrent
element. When PUA is a logical 1, one of the overcurrent elements is above its pickup setting.
PUA is instantaneous and ignores any overcurrent timing elements.
51P:
Phase Time Overcurrent Trip Alarm. Indicates that the phase time overcurrent element, 51P,
has timed out and energized. 51P will be a logical 1 when this occurs.
51P* :
Phase Time Overcurrent Trip Seal-in Alarm. See “Logical Output Types” earlier in this section.
51N:
Ground Time Overcurrent Trip Alarm. Indicates that the ground time overcurrent element,
51N, has timed out and energized. 51N will be a logical 1 when this occurs.
51N* :
Ground Time Overcurrent Trip Seal-in Alarm. See “Logical Output Types” earlier in this section.
46:
Negative Sequence Time Overcurrent Trip Alarm. Indicates that the negative sequence time
overcurrent element, 46, has timed out and energized. 46 will be a logical 1 when this occurs.
46*:
Negative Sequence Time Overcurrent Trip Seal-in Alarm. See “Logical Output Types” earlier
in this section.
50P-1:
Phase Instantaneous Overcurrent Trip Alarm Level 1 (Low Set Instantaneous). Indicates
that the phase instantaneous overcurrent element level 1, 50P-1, has timed out and energized.
50P-1 will be a logical 1 when this occurs.
50P-1*:
Phase Instantaneous Overcurrent Trip Seal-in Alarm Level 1 (Low Set Instantaneous). See
“Logical Output Types” earlier in this section.
50N-1:
Ground Instantaneous Overcurrent Trip Alarm Level 1 (Low Set Instantaneous). Indicates
that the ground instantaneous overcurrent element level 1, 50N-1, has timed out and energized.
50N-1 will be a logical 1 when this occurs.
50N-1*:
Neutral Instantaneous Overcurrent Trip Seal-in Alarm Level 1 (Low Set Instantaneous). See
“Logical Output Types” earlier in this section.
50P-2:
Phase Instantaneous Overcurrent Trip Alarm Level 2 (Mid Set Instantaneous). Indicates that
the phase instantaneous overcurrent element level 2, 50P-2, has timed out and energized.
50P-2 will be a logical 1 when this occurs.
50P-2*:
Phase Instantaneous Overcurrent Trip Seal-in Alarm Level 2 (Mid Set Instantaneous). See
“Logical Output Types” earlier in this section.
50N-2:
Ground Instantaneous Overcurrent Trip Alarm Level 2 (Mid Set Instantaneous). Indicates
that the phase instantaneous overcurrent element level 2, 50N-2, has timed out and energized.
50N-2 will be a logical 1 when this occurs.
50N-2*:
Neutral Instantaneous Overcurrent Trip Seal-in Alarm Level 2 (Mid Set Instantaneous). See
“Logical Output Types” earlier in this section.
Table 6-2: Logical Output Definitions (cont).
(O->ILO)
(I>Is)
(3I>)
(3I>*)
(IN>)
(IN>*)
(Insc>)
(Insc>*)
(3I>>1)
(3I>>1*)
(IN>>1)
(IN>>1*)
(3I>>2)
(3I>>2*)
(IN>>2*)
(IN>>2)
