IB02602004E
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Instructional Literature
Effective: May 2008
Page
159
Instructions for the FP-6000 Protective Relay
Figure 54. Close Breaker (Times in Cycles Unless Stated Otherwise).
8.9.3 Open Breaker
The FP-6000 has been designed to issue an open breaker signal
from one of its programmable contact outputs. The default
configuration maps the Open Breaker function to contact output
relay Trip 1 (see Figure 55). This relay can be made to operate for
30 line cycles after the removal of the opening signal. The Open
Breaker function can be initiated from different sources:
•
Front panel Open Breaker pushbutton, if enabled by System
Configuration “Bkr Operation PB” setting (see Section 4.2).
•
Test menu Open Breaker function.
•
Communication Open Breaker command, if enabled by
System Configuration “Remote Bkr” setting (see Section 4.2).
•
Contact input programmed to Remote Open.
By using the FP-6000 to open the breaker, the following
advantages of built-in logic are obtained:
•
A slow breaker alarm is raised if the breaker opens too slowly
(see 8.9.8 - Slow Breaker Alarm).
•
If the faceplate pushbutton is used, a warning message is
given
•
if already in the open state or a breaker state alarm (see 8.9.6 -
Breaker State Alarm) is active, or a slow breaker alarm (see
8.9.8 - Slow Breaker Alarm) is active.
8.9.4 Breaker Trip and Close Coil Supervision
The FP-6000 includes optional Trip Coil Supervision on the Trip 1
output relay and Close Coil Supervision on the Trip 2 output
relay. When the coil supervision alarm activates, it indicates
wiring to a coil or the coil itself has an electrical open circuit.
In the case of Trip Coil Supervision, a trickle current is sensed
across the Trip 1 relay output contacts whenever the breaker
state is closed and the Trip 1 relay is open. Since the state of the
breaker must be known, this function is operational only if at
least one contact input is configured as 52a or 52b. In addition,
the Trip 1 relay Monitor setting must be set to “On” and one of
the inputs set to “Breaker, OpenBkr” (see Section 4.2). By default,
if this alarm should occur the alarm contact output relay will
close.
In the case of Close Coil Supervision, a trickle current is sensed
across the Trip 2 relay output contacts whenever the breaker
state is open and the Trip 2 relay is open. Since the state of the
breaker must be known this function is operational only if at least
one contact input is configured as 52a or 52b. In addition, the
Trip 2 relay Monitor setting must be set to “On” and one of the
inputs set to “Breaker, CloseBkr” (see Section 4.2). By default, if
this alarm should occur the alarm contact output relay will close.
If the Trip 2 Monitor Alarm is active, this is an indication that the
close breaker circuit might not be able to close the breaker, if so
desired.
Figure 55. Open Breaker (Times in Cycles Unless Stated Otherwise).
ANY PB OTHER THAN ENTER
TRIP 1
REMOTE OPEN
BKR TROUBLE
LATCH
BKR STATE TIME ALM
CLOSE BKR
[CLOSE BREAKER TO P.L.
DEFAULT OUT #3]
PULSE
REMOTE CLOSE
BKR STATE OPEN
PANEL CLOSE
CLOSE BLOCKING
UI RESET ALARM
30
0
z
NO STATE MONITORING
BKR STATE CLOSED
LATCH
CLOSE
SHOT
ONE
BKR STATE LOCKOUT
0
40
45
0
R
S
Q
R
S
Q
OR
AND
AND
OR
OR
AND
OR
AND
FRONT PANEL CLOSE BREAKER
R
LATCH
S
Q
BKR SYNC CLOSE
AND
IN SYNC
BKR CLOSE REQUEST
BKR CLOSE REQUEST IN SYNC
OR
BKR STATE CLOSED
AUTORECLOSE
WARNING
IF THE TRIP 1 MONITOR ALARM IS ACTIVE, THIS IS AN INDICATION
THAT THE TRIP CIRCUIT MIGHT NOT BE ABLE TO OPEN THE
BREAKER IF A FAULT SHOULD OCCUR. IMMEDIATE INVESTIGATION
OF THE CIRCUIT SHOULD BE PERFORMED.
