Abb Power Contactors

High-frequency motor starting and rapid load-changing demonstrate the limitations of poor contact systems. The unintentional shutdown of an electrical apparatus as a result of welding contacts, coil failure or overheating terminals will have to be done on an emergency basis. The bi-motor contactors supplied by ABB for for use with these conditions of operation have proven electrical endurance as well as excellent switching performance under a daily production cycle. No matter how many times a contactor actuates, whether it is an electrical motor feeder, capacitor bank or power control circuit, the apparatuses have excellent endurance characteristics.

Contact materials and arc chamber configuration are designed to provide maximum making and breaking current capability, making certain that reliable operation occurs under continual start-stop conditions. The selection of a coil voltage is equated to the control power supply so that the pull-in is strong enough to hold the armature when the voltage of the control power fluctuates. Compact size allows a greater density of feeders to be located in the enclosure than would normally allow for ease of wiring and dissipation of heat.

You can configure auxiliary contacts depending on your needs for interlocking, feedback, or PLC interface to support automation logic in motor control systems. The design of the terminal encourages good tightening and minimizes temperature rise due to poor connections. The mechanical life of this contactor is suitable where high-frequency switching occurs.

This contactor provides mounting compatibility with thermal overload relays and protective devices, which results in more organized panel assembly and reduced maintenance time for replacements.

Power contactors are used extensively throughout MCC panels, pump control systems, HVAC equipment, compressors and industrial automation systems that require reliable load switching, long service life and consistent operating characteristics in order to operate without interruption.