A contactor or relay is a switch, which is controlled electrically using a high current rating to change between alternative power circuits. Solid state contactors open up or close off an electrical circuit as a result of an external signal received by the component. These contactors allow for low power input for the switching of higher current loads but with minimal supply current required. Solid state contactors offer high shock and vibration resistance features.
What are solid state contactors used for? Solid state contactors are useful in controlling motion, including for conveyor systems, valves, elevators, lifts and hoists. They're typical in industries where heat control is required: in professional food equipment and plastic moulding or extrusion machinery and soldering devices. Solid state contactors also facilitate power load control in power supplies, regulators, inverters and converters.
Types of solid state contactors Solid state contactors are available as three phase or single phase devices. Single phase contactors switch one phase AC or DC power loads and three phase devices switch up to three AC and DC power loads in machinery. Reverse phase contactors perform the opposite function and are necessary for protecting motor overloads.
Description:
Professional range of WEG contactors from the CWC
Series designed for switching of electric motors. The contactors are modular and compact but at the same time robust and highly reliable. Built and tested according to IEC/EN60947 and DIN VDE 0660. Direct mounting capabilities. The controllers include contactors and reversing contactors. ...
Description:
Climate-proof, finger safe contactor relays. RC elements, varistors,
diodes or diode assemblies (combination of a diode and a Zener diode) can be plugged onto all contactor relays for damping opening surges in the coil. Size S00High degree if contact stability at low voltages & currentSuitable for use with solid-state circuits ...
Description:
3RB30 and 3RB31 solid-state overload relays up to
80 A with internal power supply have been designed for current-sensitive protection of loads with normal and heavy starting against excessive temperature rises due to overload, phase unbalance or phase failure. Switch position indicator and test functionTrip class setting/internal ground-fault detectionSelector switch ...
Description:
Climate-proof, finger safe contactor relays. RC elements, varistors,
diodes or diode assemblies (combination of a diode and a Zener diode) can be plugged onto all contactor relays for damping opening surges in the coil. Size S00High degree if contact stability at low voltages & currentSuitable for use with solid-state circuits ...