GE Feeder Management Relay 750 Instruction Manual page 156

5.7 S6 MONITORING
d) BREAKER OPERATION
PATH: SETPOINTS S6 MONITORING
BRKR OPERATION
[ENTER] for more
Circuit breakers typically have both a 52a (breaker tripped = open) contact and a 52b (breaker tripped = closed) contact.
Either or both of these contacts can be connected to the relay logic inputs, from which breaker status is detected. Interpre-
tation of breaker status depends on which 52 contacts are installed. See System Status LED Indicators on page 4–2 and
Breaker Functions on page 5–21 for more information on 52a (52b) contacts. If neither 52a nor 52b contacts are installed,
correct breaker operation will not be verified and a breaker operation alarm can never occur.
A breaker operation failure can be caused by either of the following conditions if
"Alarm" or "Control".
• The breaker does not respond to a trip command within the programmed breaker operation delay time.
• The breaker does not respond to a close command within the programmed time.
When a breaker operation failure is declared, the selected output relays will operate, but the Close Relay and 760 autore-
closure will be inhibited. If the 760 already has a reclosure scheme in progress, it will be sent to lockout.
A Breaker Operation failure condition results if the breaker does not respond within the
5
time is a characteristic of the breaker being used.
5-92
Courtesy of NationalSwitchgear.com
EQUIPMENT BRKR OPERATION
ð
BRKR OPERATION
ENTER
ESCAPE
FUNCTION: Disabled
BRKR OPERATION
ESCAPE
MESSAGE RELAYS (3-7): -----
BRKR OPERATION
ESCAPE
MESSAGE DELAY: 0.10 s
Figure 5–53: BREAKER OPERATION LOGIC
750/760 Feeder Management Relay
Range: Disabled, Alarm, Latched Alarm, Control
Range: Any combination of 3 to 7 Auxiliary relays
Range: 0.03 to 1.00 s in steps of 0.01
BRKR OPERATION FUNCTION
BRKR OPERATION DELAY
5 SETPOINTS
is set to
time. This
GE Multilin