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M3 BREAKER MAINTENANCE
Close - form A contacts
7–10
Figure 7-8: Close Coil circuit with continuous monitoring
DC +
B4
A4
V
B5
52b contact
Close
Coil
DC -
The following path is available using the keypad. For instructions on how to use the
keypad, please refer to Chapter 3 - Working with the Keypad.
PATH:
MAINTENANCE > M3 BKR MAINTENANCE > CLOSE COIL
RLY2 COIL FUNCTION
Range: Disabled, Alarm, Latched Alarm
Default: Disabled
For details see
Common
The "ALARM" and "MAINTENANCE" LEDs will light up upon detection of a close coil
circuitry problem.
RLY2 COIL DELAY
Range: 1 to 10 sec in steps of 1 sec
Default: 5 s
This setting defines the Close Coil Monitor Delay, before targets appear on the display,
"ALARM" and "MAINTENANCE" LEDs light up on the front panel, and selected output
relays operate.
BYPASS BKR STATUS
Range: Disabled, Enabled
Default: Disabled
Set the "BYPASS BKR STATUS" to Enabled when a by-pass resistor is connected across
the breaker auxiliary contact for continuous Close circuit integrity monitoring. The
circuits will be monitored regardless of breaker position. When "BYPASS BKR STATUS" is
set to Disabled, monitoring of the close coil will be blocked when the breaker is closed.
OUTPUT RELAY X
Range: Do not operate, Operate
Default: Do not operate
For details see
Common
External
jumper
By-pass
R
resistor
setpoints.
setpoints.
339 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 7: MAINTENANCE
898793.cdr
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