Automatic Transfer Switch Controller

La description

Automatic Transfer Switch Controller
It 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, at least a key-start bok with an external for the start /stop signal.

The controller is capable of providing the following three different types of changeover (transition)

•             open delayed transition

•             open in-pase transition with synch check

•             closed short-time (**0ms) 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”.

controller can be used also for the MAINS-MAINS applications and not only for the MAINS-GEN applications. The system recognizes application type according to the Gen Start/Stop and Gen Ready To Load logical binary output and configuration. If the both are configured/used (default setting) it tells the controller that the MAINS-GEN application type is to be used. If not configured, the MAINS-MAINS application type takes place. In this case the stop-fail protection and the generator current protection are not evaluated.

                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.

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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