Trip Coil - GE 339 Instruction Manual

M3 BREAKER MAINTENANCE
Trip - form A contacts
V
7–8
Figure 4: Trip circuit with continuous monitoring
DC +
External
A2
jumper
B3
A3
By-pass
52a contact
R
resistor
Trip
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 > TRIP COIL
RLY1 COIL FUNCTION
Range: Disabled, Alarm, Latched Alarm
Default: Disabled
Selecting Alarm, or Latched Alarm, enables the Trip Coil Monitor monitoring function. The
"ALARM" and "MAINTENANCE" LEDs will light up upon detection of a trip coil circuitry
problem. The "ALARM" LED will flash upon Trip Coil Monitor operating condition, with the
Trip Coil Monitor function selected as Alarm, and will self-reset, when the condition
clears. If Latched Alarm is selected, the "ALARM" LED will flash during the Trip Coil
Monitor condition, and will stay "ON" after the condition clears, until the reset command
is initiated. Any or all of output relays 4 to 6 can be selected to operate when the Trip Coil
Monitor function is selected as Alarm, or Latched Alarm.
RLY1 COIL DELAY
Range: 1 to 10 sec in steps of 1 sec
Default: 5 s
This setting defines the Trip 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 Trip circuit integrity monitoring. The circuits
will be monitored regardless of breaker position. When "BYPASS BKR STATUS" is set to
Disabled, monitoring of the trip coil will be blocked when the breaker is open.
OUTPUT RELAY 4 to 6
Range: Do not operate, Operate
Default: Do not operate
Any, or all, of output relays 4 to 6 can be selected to operate upon detection of Trip Coil,
or a Trip coil circuitry problem. The selection of the relay outputs operation is available
no matter whether the Alarm, or Latched Alarm, function is selected.
CHAPTER 7: MAINTENANCE
339 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
896780.cdr