InteliATS
NT
PWR, SW version 1.0, ©ComAp – March 2009
43
IA-NT- PWR-1.0-Reference Guide R1.pdf
Mains
<Freq [%]
Threshold for mains underfrequency. All three phases are checked. Maximum out of three is used.
Step:
0.1% of Nominal frequency
Range:
50% – 150.0(Mains >Freq)%
Mains Freq Del
[s]
Delay for mains underfrequency and overfrequency
Step:
0.1s
Range:
0 – 60.0 s
MCB Logic
[CLOSE-ON / CLOSE-OFF]
The set point influences the behavior of the output MCB CLOSE/OPEN
CLOSE-ON: When the output MCB CLOSE/OPEN is closed – MCB should be closed.
CLOSE-OFF: When the output MCB CLOSE/OPEN is closed – MCB should be opened.
IA “OFF”
MCB logic = ”CLOSE-ON”
IA “ON
”
Mains O.K.
Mains O.K.
Mains Failure
Signal after exter
inverted relay
MCB logic = ”CLOSE-OFF”
nal
+
Battery
-
iL
DO 4
MCB
AUX.
INVERTING
RELAY
N
OTE
:
In the case MCB Logic = “CLOSE-OFF” it is necessary to change externally the polarity of the output
signal.
ReturnFromTEST
[MANUAL / AUTO]
The set point influences the behavior of the TEST mode.
MANUAL
:
1) Select TEST, gen-sets starts and running unloaded
