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Table 6-1: Logical Input Definitions (cont).
79M:
Multi-Shot Reclosing. Enables a multi shot of reclosing when the DPU1500R determines that
an external device has opened the circuit breaker. When 79M is a logical 1, multi shot
(O->I)
reclosing is enabled. 79M defaults to a logical 0 (disabled) when not assigned to a physical
input or feedback term. See Section 1 under "Reclosing" for more details.
OPEN:
Initiates Trip Output. Assign this input to a physical input for remote opening of the breaker by
a control switch. It is recommended this input be used for breaker control when using the
MDT mode. When OPEN is a logical 1, a trip is issued at the master trip output. OPEN defaults
to a logical 0 (disabled) when not assigned to a physical input or feedback term.
CLOSE:
Initiates Close Output. Assign this input to a physical input for remote closing of the breaker
possibly by a control switch. It is recommended this input be used for breaker control when
using the MDT mode. When CLOSE is a logical 1, the LOGICAL OUTPUT "CLOSE" is asserted.
CLOSE defaults to a logical 0 (disabled) when not assigned to a physical input or feedback
term.
ECI1:
Event Capture Initiate. Assign this input to a physical input to capture events from external
devices. When ECI1 is a logical 1, an event called "ECI1" is logged in the operations record.
ECI1 defaults to a logical 0 (no event) when not assign to a physical input or feedback term.
ECI2:
Event Capture Initiate. As with ECI1, assign this input to a physical input to capture events
from external devices. When ECI2 is a logical 1, an event called "ECI2" is logged in the
operations record. ECI1 defaults to a logical 0 (no event) when not assign to a physical input
or feedback term.
WCI:
Waveform Capture Initiate. Assign this input to either a physical input or feedback term for
initiation of the oscillographic waveform capture. WCI can be used to capture waveform for
other devices in the system that do not contain oscillograpic capability. When WCI is a logical
1, the oscillograpic waveform capture is initiated for the number of cycles programmed in the
oscillographics settings (see the Oscillographics Section). WCI defaults to a logical 0 (no
event) when not assigned to a physical input or feedback term.
46:
Enables the 46 Negative Sequence time overcurrent function. Use to supervise (torque
control) the negative sequence time overcurrent element. When the 46 input is a logical 1,
(Insc>)
negative sequence time overcurrent protection is enabled. 46 defaults to a logical 1 (enabled)
if not assigned to a physical input or feedback term.
CRI:
term to remotely clear the Reclose and Overcurrent Counters. When CRI is a logical 1, the
reclose and overcurrent counters are returned to 0. CRI defaults to a logical 0 (no clear)
when not assigned to a physical input or feedback term.
UDI:
LCD display. When UDI is a logical 1, a user defined message as preprogrammed using the
Windows External Communication Program (WinECP), is displayed along with the LCD default
display in 1 second alternating intervals. UDI defaults to a logical 0 (disabled) when not
assigned to a physical input or feedback term. This is useful for tagout conditions.
message can be changed using WinECP under "Settings", "Miscellaneous Settings".
EXTBFI:
typically assigned to the same physical input as the 52a contact. EXTBFI defaults to a logical
0 (no input) when not assigned to a physical input or feedback term.
BFI:
Breaker Failure Trip logic. It is typically connected to an external protective device with a BFI
output contact. BFI defaults to a logical 0 (no input) when not assigned to a physical input or
feedback term.
TARC:
is useful in the testing of the circuit breaker trip and close circuits as well as the recloser logic
and timing settings. When TARC is a logical 1, a trip and automatic reclose sequence is
initiated. If the input is held at a logical 1, the DPU1500R will continue to trip and reclose
through the recloser steps (79-1, 79-2, 79-3, etc., see Recloser Section for reclosing details).
If TARC is pulsed at a logical 1, the trip and auto reclose will only occur once unless TARC is
pulsed again. TARC defaults to a logical 0 (disabled) when not assigned to a physical input or
feedback term.
Programmable Input and Output Contacts
Clear Reclose and Overcurrent Counters. Assign this input to a physical input or feedback
User Display Input. Assign this input to a physical input to flash a message to the front MMI
External Starter Input. This input is used to start the breaker failure tripping sequence. It is
Breaker Fail Initiate. Assign this input to a physical input or feedback term for initiation of the
Initiate Trip and Auto Reclose. This input is used to issue a circuit breaker trip and reclose. It
ABB Distribution Protection Unit 1500R
website:www.abb.com/papd
The
6-3
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