Control Functions - GE 750 Instruction Manual

750/760
Feeder Management Relay
CAUTION
CAUTION

Control Functions

CONTROL
FUNCTIONS
5–22
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? INSTALLED?
Yes Yes
Yes No
No Yes
No No
When asserted, the logic input assigned by the
that 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.
PATH: SETPOINTS S3 LOGIC INPUTS
[ ] LOCAL MODE:
Disabled
RESET:
MESSAGE
Disabled
REMOTE OPEN:
MESSAGE
Disabled
REMOTE CLOSE:
MESSAGE
Disabled
COLD LOAD PICKUP:
MESSAGE
Disabled
SETPOINT GROUP 2:
MESSAGE
Disabled
SETPOINT GROUP 3:
MESSAGE
Disabled
SETPOINT GROUP 4:
MESSAGE
Disabled
The setpoint places the relay in local mode. The relay is in remote mode
LOCAL MODE
if not forced into local mode by this setpoint. The
indicator and latched relays. With the 760, it also resets the autoreclose lockout.
The setpoint initiates the Cold Load Pickup blocking feature. The
COLD LOAD PICKUP
through
SETPOINT GROUP 2 SETPOINT GROUP 4
2, 3, or 4 the active setpoint group.
The and
REMOTE OPEN REMOTE CLOSE
Relay and a breaker closure via the Close Relay, respectively. These setpoints are
operational only when the relay is in remote mode (i.e., when
"Disabled").
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setpoints are used to monitor the 52/a and 52/b
INTERPRETATION
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
CONTROL FUNCTIONS
Range: Input 1 to Input 20, Disabled
Range: Input 1 to Input 20, Disabled
Range: Input 1 to Input 20, Disabled
Range: Input 1 to Input 20, Disabled
Range: Input 1 to Input 20, Disabled
Range: Input 1 to Input 20, Disabled
Range: Input 1 to Input 20, Disabled
Range: Input 1 to Input 20, Disabled
setpoint resets the last trip
RESET
setpoints signal the relay to make Group
setpoints initiate a breaker opening via the Trip
S3 Logic Inputs
setpoint indicates
is set to
LOCAL MODE
GE Multilin