GE Multilin 850 Instruction Manual page 475

CHAPTER 4: SETPOINTS
NOTE:
850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL
Both initiating inputs can be inhibited by a blocking input.
Two CLP elements, CLP1 and CLP2 are provided in 850 relays ordered to support two
breakers. In this case the selection of the CT bank under the Signal Input setpoint for CLP1
must be associated with BKR1, and the CT bank under Signal Input for CLP2 must be
associated with BKR2. This is also dictated by the flexoperand input "AR 1 Disabled" in the
CLP1 scheme.
Path: Setpoints > Control > Cold Load Pickup X
FUNCTION
Range: Disabled, Alarm, Latched Alarm, Configurable
Default: Disabled
SIGNAL INPUT
Range: Order code dependant
Default: CT Bank 1-J1
This setting provides selection of currents input (CT Bank) for the CLP algorithm.
EXTERNAL INITIATION
Range: Off, Any FlexLogic operand
Default: Off
The setpoint selects the FlexLogic operand, digital input, virtual input, or remote input
that initiates the Cold Load Pickup scheme, bypassing the Outage Time Before Cold
Load.
OUTAGE T BEFORE COLD LOAD
Range: 0.000 to 6000.000 s in steps of 0.001 s
Default: 1000.000 s
The setting provides a definite time after which it is expected that the normal load
diversity has been lost.
COLD LOAD T BEFORE RESET
Range: 0.000 to 6000.000 s in steps of 0.001 s
Default: 100.000 s
The setting provides a definite time after which it is expected that the feeder load has
decayed to a normal level.
BLOCK PHASE IOC 1 (2, 3, 4)
Range: Off, On
Default: Off
If set to "On," the operation of the PHASE IOC 1/2 protection element is be blocked after
the Cold Load Pickup condition is detected.
BLOCK NEUTRAL IOC 1 (2, 3, 4)
Range: Off, On
Default: Off
If set to "On," the operation of the NEUTRAL IOC 1/2 protection element is blocked after
the Cold Load Pickup condition is detected.
BLOCK GROUND IOC 1 (2, 3, 4)
Range: Off, On
Default: Off
If set to "On," the operation of the GROUND IOC 1 protection element is be blocked after
the Cold Load Pickup condition is detected.
CONTROL
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