GE Multilin F650, Инструкция по эксплуатации

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CHAPTER 5: SETPOINTS 5.5 CONTROL ELEMENTS
GEK-106310-AF F650 DIGITAL BAY CONTROLLER 5-129
DIGCNT X RESET: Counter command. It sends a Reset command to the specified counter.
DIGCNT X FREEZERESET: Counter command. It copies the current counter value to the DIGCNT X FROZENVALUE
actual value and the current date to the DIGCNT X FROZENDATE actual value. Then a
Reset command is sent to the specified counter.
DIGCNT X FREEZECOUNT: Counter command. It copies the current counter value to the DIGCNT X FROZENVALUE
actual value and the current date to the DIGCNT X FROZENDATE actual value. Then the
specified counter value DIGCNT X VALUE is set to 0 or to the DigCnt X Preset setting
value.
Periodically the counter current Value and Frozen Value and Date are saved to non-volatile memory to keep them safe
from an unexpected energy loss.
Note: Digital Counters only appear in the Actual Values menu option in HMI, in the Control Elements level.
5.5.10 Cold load pickup
The F650 can be programmed to detect a Cold Load condition and generate a signal which can be configured to block
protection elements.
Under normal operating conditions, the actual load on a feeder is less than the maximum connected load, since not all
consumers require maximum load at the same time. A Cold Load condition can be caused by a prolonged outage of the
load or by opening of the circuit breaker. Upon the return of the source, the circuit experiences inrush current into
connected transformers, accelerating currents into motors, and simultaneous demand from many other loads because
the normal load diversity has been lost.
The relay detects Cold Load condition (Cold Load Pickup OP) when the breaker remains opened for a period of time greater
than the
Outage Time Before Cold Load setting.
Once the breaker is closed, Cold Load Pickup OP is mantained asserted for the time programmed in Cold Load Pickup
Block. This signal can be used as a source for blocking the protection elements to be inhibited during the Cold Load.
Specifications – Control
Setting description for Cold Load Pickup:
Function permission (Function): This setting allows enabling and disabling the Cold Load Pickup element.
Outage Time before ColdLoad: Time that the breaker must remain opened in order to detect Cold Load condition.
ColdLoad Blocking Time: Time that the Cold Load condition is maintained after the breaker has been closed.
COLD LOAD PICKUP
Operating Parameters: Breaker opened (from AV)
Outage time before cold load: 1 -1000 in steps of 1min
Cold Load Blocking time: 1-1000 in steps of 1s
SETPOINT > CONTROL ELEMENTS > COLD LOAD PICKUP
SETTING DESCRIPTION
NAME DEFAULT VALUE STEP RANGE
Function permission Function DISABLED N/A [DISABLED – ENABLED]
Outage Time before
ColdLoad
Outage Time
before ColdLoad
20 min 1 min [1-1000]
ColdLoad Blocking Time ColdLoad Blocking
Time
5 s 1 s [1-1000]
Snapshot event generation Snapshot Events ENABLED N/A [DISABLED – ENABLED]