InteliATS
NT
PWR, SW version 2.5, ©ComAp – May 2015 7
IA-NT- PWR-2.5-Reference Guide.pdf
Description
Description of the controller system
InteliATS
NT
is a comprehensive Automatic Transfer Switch controller designed to monitor the incoming
AC mains supply (1 or 3 phases) for under & over voltage, under & over frequency and voltage
unbalance. In the case of any mains supply disproportion it will send a remote start command to the
gen-set and make changeover for both generator and mains contactors. The gen-set requires a
remote start type control unit (e.g. the ComAp InteliLite
NT
MRS 10 controller), at least a key-start box
with an external input for the start/stop signal.
The controller is capable of providing the following three different types of changeover (transition)
open delayed transition
open in-phase transition with synch check
closed short-time (100ms) parallel transition with synch check
In order to provide “synch check” the controller has been enhanced by the feature called passive
synchronization. The passive sync (sync check) offers possibility to “synchronize” mains and gen-set
without the need to use speed regulation or - better to say - it offers possibility to wait for the both
sources to get in phase.
System is evaluated as to be in sync according to the predefined parameters – voltage and frequency
difference – if the both sources will get in-phase before the synchronization timeout expires.
Parameters defining breaker delay are taken into the account when the system computes/predicts
exact moment when the both sources are “in phase”.
InteliATS
NT
controllers are equipped with a powerful graphic display showing icons, symbols and bar-
graphs for intuitive operation, which sets, together with high functionality, new standards in Gen-set
controls & ATS Breaker.
The key features are:
Easy-to-use operation and installation. Factory default configuration covers most of
applications
Different customer changes are possible thanks to the configurability
Excellent remote communication capabilities
High reliability
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