Surge suppressors protect and lengthen the life of motors, contactors, relays, solenoids and PLC outputs. Contactor and solenoid surge suppressors reduce voltage spikes and electromagnetic noise caused by inductive loads. Motor suppressors protect 575 VAC 3-phase motors from damaging line surges.
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Inductive voltage spikes have a polarity that opposes the supply voltage, causing arcs, reducing the life of switching equipment, and making the control system behave unpredictably. Inductive loads generate transient voltages when their coils are de-energized. These transient voltages can be many times greater than the coil voltage, damaging devices in the circuit and causing unreliable operation in neighboring electronics. It is essential to manage these transients with surge suppressors to extend the life of connected components and provide reliable control system operation. Typical transient voltage suppression (TVS) circuits are:
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Contactors can produce high voltage spikes when their coils are de-energized. If unsuppressed, these transient voltages can damage PLC outputs, contactor coils, or affect neighboring electronics.
Motor surge suppressors protect against the damaging effects of line surges.
Valve surge suppressors mount between the valve base and valve plug to protect against damage caused by voltage spikes from solenoid coils.
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