FP-5000
IL17569C
Page 8-13
Effective Date: 12/05
Effective Date: 12/05
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Page 8-13
Figure 8-13. Close Breaker (Times in cycles unless stated otherwise)
Figure 8-14. Open Breaker (Times in cycles unless stated otherwise)
configuration maps the Open Breaker function to contact output
relay Trip 1 (see figure 8.14 below). 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 5.4.1).
• Test menu Open Breaker function.
• Communication Open Breaker command, if enabled by System
Configuration “Remote Bkr” setting (see Section 5.4.1).
• Contact input programmed to Remote Open.
By using the FP-5000 to open the breaker, the following advan-
tages 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-5000 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”. By default, if this alarm should
occur the alarm contact output relay will close.
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.
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”. 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.
8.9.5 Breaker Failure (50BF)
