InteliATS
NT
PWR, SW version 1.0, ©ComAp – March 2009 42
IA-NT- PWR-1.0-Reference Guide R1.pdf
The time charts bellow show recommended setting of AMF Settings: Transfer Del setpoint.
If the Transfer Del setpoint is set shorter If some delay between MCB feedback
than the time required for opening of the deactivation and closing of GCB Close/Open
circuit breaker, the controller closes GCB output is required, then the Transfer Del
Close/Open output straight away (100 ms) must be set to sum of “MCB opening” + “del”
after the MCB feedback input deactivates. time.
MCB
Close/Open
MCB
Close/Open
MCB
Feedback
GCB
Close/Open
MCB
Feedback
GCB
Close/Open
MCB Close Del [s]
Delay after mains returns to MCB closing, if gen-set is not running(e.g. is in start-up procedure)
Step: 0.1s
Range: 0 – 60.0 s
Mains >V [%]
Threshold for mains overvoltage. All three phases are checked. Maximum out of three is used.
Step: 1% of Nominal voltage
Range: 50 (Mains <V) – 150%
Mains <V [%]
Threshold for mains undervoltage. All three phases are checked. Maximum out of three is used.
Step: 1% of nominal voltage
Range: 50% – 150 (Mains >V)%
Mains V Del [s]
Delay for mains undervoltage and overvoltage
Step: 0.1 s
Range: 0 – 600.0 s
Mains V Unbal [%]
Threshold for mains voltage unbalance
Step: 1% of Nominal voltage
Range: 1 – 150%
Mains VUnb Del [s]
Delay for mains voltage unbalance
Step: 0.1 s
Range: 0- 60.0
Mains >Freq [%]
Threshold for mains overfrequency. All three phases are checked. Maximum out of three is used.
Step: 0.1% of Nominal frequency
Range: 50 (Mains <Freq) – 150.0%
MCB opening
del
Transfer Del
Transfer
Del
MCB opening
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