RECLOSER CONTROL EVRC2A-N6,NT
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is applied when a load current becomes 0 and then it is restored after certain outage time. If “NO”
is set, the algorithm is applied when a recloser is opened and then after certain outage time, the
recloser is closed manually. If the fault current over the cold load pickup level occurs, the
protection element by the cold load pickup function is operated immediately.
If the power loss (opening or load current loss) is sustained for a long time more than certain
outage time, the pickup current of time overcurrent element is changed to be the setting value of
the cold load pickup current. After the restoration of load supply (manually closing or restoration
of load current), protection functions are normally operated when the Restore minimum time
(RMT) is expired.
Figure 7-4. The Cold Load Pickup Characteristic
The cold load pickup function is operated according to the following rules.
The setting to use the cold load pickup function is set to be ON (set to TRIP or TR&AR), the
cold load pickup level is preset and then the cold load pickup function is activated at manual
close or restoration of load current.
If the level of over current occurring at the restoration of load supply is over the cold load
pickup current, the Lockout is done by protection function after oneshot trip (Refer the Inrush
Current 1 in
“Figure 7-5. The Restore Minimum Time Characteristic”
).
Overcurrent
Pickup Level
Cold load
Pickup Level
Trip Area
Time
Current
Delay Curve
Non Trip Area
Summary of Contents for EVRC2A-N6-NT
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