GE Power Management 750/760 Feeder Management Relay 13-
33
13 S6 MONITORING 13.8 EQUIPMENT
13
13.8.4 BREAKER OPERATION
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. Interpretation of breaker status depends on which 52 contacts are installed. See Sections
5.2.3: SYSTEM STATUS INDICATORS on page 5–2 and 10.3: BREAKER FUNCTIONS on page 10–4 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
BREAKER OPERATION FUNCTION
is set to
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 2 CLOSE relay
and 760 autoreclosure will be inhibited. If the 760 already has a reclosure scheme in progress, it will be sent to
lockout.
â– BREAKER OPERATION
â– [ENTER] for more
The
BREAKER OPERATION
setpoints path is:
\ SETPOINTS \ S6 MONITORING \ EQUIPMENT \ BREAKER OPERATION
BREAKER OPERATION
FUNCTION: Disabled
Range:
Disabled, Alarm, Latched Alarm, Control
Select the required function.
BREAKER OPERATION
RELAYS (3-7): -----
Range: Any Combination of the 3-7 AUXILIARY Relays
Select the output relays required.
BREAKER OPERATION
DELAY: 0.10 s
Range: 0.03 to 1.00 in steps of 0.01 s
Enter the maximum time within which the breaker must respond to any open or
close command. A Breaker Operation failure condition will result if the breaker
does not respond within this programmed time. This time is a characteristic of
the breaker being used.
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