GE 750 Instruction Manual page 155

CHAPTER 5: SETPOINTS
750 FEEDER MANAGEMENT RELAY – INSTRUCTION MANUAL
• Autoreclose
• Transfer
It is strongly recommended that the Breaker Operation Failure alarm be enabled when
either 52a or 52b breaker auxiliary contacts are installed.
Breaker logic functions must be assigned to Logic Inputs 1 to 14 as they must only be
contacts.
The and
52A CONTACT 52B CONTACT
contacts. The following table determines how these contacts affect the breaker state:
52/a CONTACT 52/b CONTACT
INSTALLED?
Yes Yes
Yes No
No Yes
No No
When asserted, the logic input assigned by the
the breaker is connected to the primary system. When the breaker is determined to be
disconnected, the breaker state is shown to be neither open nor closed. For further
information regarding operation with only one auxiliary breaker contact, see System
Status LED Indicators on page 4–3.
setpoints are used to monitor the 52/a and 52/b
INSTALLED?
52a closed indicates breaker is closed
52b closed indicates breaker is open
52a closed indicates breaker is closed
52a open indicates breaker is open
52b open indicates breaker is closed
52b closed indicates breaker is open
Breaker status unknown
BRKR CONNECTED
S3 LOGIC INPUTS
INTERPRETATION
setpoint indicates that
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