Solid state reversing contactor FEAS GmbH

Application
FEAS Solid State reversing contactors are electronic load relays, whitch be used for fast and loudless switching of three-phase asynchronous motors with be operated in both rotating directions. Because of the contactless operation the live span is nearly unlimited. Robust power semiconductors are implemented and they are schwitching in voltage zero crossover and generate so no additional high frequency noise pulses.
The equipment is integrated into a functional and sturdy case, which makes it insensitive to choke stress and vibrations. Also an application in aggresiv environment is unproblematic.
An installed temperature monitoring, signals an excessively high temperature rise before the equipment protects themselves and disconnects. If the implemented phase monitoring detect the loss of one phase, the start of the motor is retarded and this status is signaled, untill all three lines are present.

Operational principle
The semiconductor operates according to the principle of a zero crossover or a zero voltage switch. After applying the control voltage the power output (load circuit) of the semiconductor relay is opened, once the first zero point of the line voltage is reached. The typical time of response is shorter than the half period duration that means less than 10mS with 50Hz frequency.

Version
Installed and completely potted in an aluminum case for direct mounting on DIN rail.

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