Static Contactor Switching Modules

A static contactor switching module is a semiconductor switching element that connects and disconnects power factor correction capacitor steps with a thyristor instead of mechanical contacts. It is used on loads whose reactive power demand changes very quickly, such as spot welding machines, cranes, elevators and presses, for fast step changes that a conventional power factor correction contactor cannot keep up with. Because the thyristors are triggered at zero crossing, the capacitor inrush current is limited, and since there are no moving contacts, there is no contact wear in frequent switching. The products in the category are grouped under static thyristor capacitive modules; models from Tibcon and Tense are available in step ratings such as 5, 15, 30, 50 and 100 kVAr. Choose the module by the power of the step it will switch (kVAr), the grid voltage, whether the capacitor is single-phase or three-phase, the output signal of the relay and the cooling method. Because the trigger command comes from the power factor correction relay, verify from the manufacturer data that the relay output type is compatible with the module's trigger input.

Products

How to choose Contactor Switching Modules

A static contactor switching module is a semiconductor switching element that connects and disconnects power factor correction capacitor steps with a thyristor instead of mechanical contacts. It is used on loads whose reactive power demand changes very quickly, such as spot welding machines, cranes, elevators and presses, for fast step changes that a conventional power factor correction contactor cannot keep up with.

  • Take reactive power demand and harmonic distortion levels from site measurements or project calculations.
  • Compare kVAr step sizes, rated voltage and step count against the compensation panel layout.
  • Select capacitor duty contactors, harmonic filter reactors and discharge resistors together with the capacitor bank.

Frequently asked questions

What is Contactor Switching Modules and where is it used?

A static contactor switching module is a semiconductor switching element that connects and disconnects power factor correction capacitor steps with a thyristor instead of mechanical contacts. It is used on loads whose reactive power demand changes very quickly, such as spot welding machines, cranes, elevators and presses, for fast step changes that a conventional power factor correction contactor cannot keep up with.

What should I compare when choosing Contactor Switching Modules?

Choose the module by the power of the step it will switch (kVAr), the grid voltage, whether the capacitor is single-phase or three-phase, the output signal of the relay and the cooling method.

Which product groups are available under Contactor Switching Modules?

The current subcategories include Static Thyristor Capacitive Modules. Open a subcategory to compare its products and technical details.

Contactor Switching Modules Selection Guide: Technical Criteria and Engineering Practice