Contactor Accessories

Contactor accessories are products that attach to a contactor to add functions such as mechanical interlocking, coil surge suppression, time delay and ready-made connections, or that allow parts such as the coil and contact set to be replaced. They are used in reversing and star-delta starting to prevent two contactors from pulling in at the same time, to protect the control circuit from the voltage surge produced when the coil loses power, and to shorten panel wiring. The category lists mechanical interlocks, RC, varistor and diode suppression elements, reversing and star-delta connection kits, spare coils and spare contact sets for Siemens, Schneider Electric TeSys and ABB contactors. Choose the accessory first according to the contactor's series and frame size, then according to the coil voltage, whether it is AC or DC, and the type of suppression element. Diode suppression elements are used only on DC coils and lengthen the contactor's release time. The contactor's spare coil should not be confused with the shunt trip coil that opens a switch remotely; the two are parts of different devices.

Products

How to choose Contactor Accessories

Contactor accessories are products that attach to a contactor to add functions such as mechanical interlocking, coil surge suppression, time delay and ready-made connections, or that allow parts such as the coil and contact set to be replaced. They are used in reversing and star-delta starting to prevent two contactors from pulling in at the same time, to protect the control circuit from the voltage surge produced when the coil loses power, and to shorten panel wiring.

  • Separate overcurrent/leakage protection, motor starting and local isolation requirements.
  • Select rated current, pole count and breaking capacity (kA) from the installation calculation.
  • Match coil voltage, auxiliary contacts and tripping curve to the control circuit and load type.

Frequently asked questions

What is Contactor Accessories and where is it used?

Contactor accessories are products that attach to a contactor to add functions such as mechanical interlocking, coil surge suppression, time delay and ready-made connections, or that allow parts such as the coil and contact set to be replaced. They are used in reversing and star-delta starting to prevent two contactors from pulling in at the same time, to protect the control circuit from the voltage surge produced when the coil loses power, and to shorten panel wiring.

What should I compare when choosing Contactor Accessories?

Choose the accessory first according to the contactor's series and frame size, then according to the coil voltage, whether it is AC or DC, and the type of suppression element.

Where can I find technical details for Contactor Accessories products?

Contactor accessories are products that attach to a contactor to add functions such as mechanical interlocking, coil surge suppression, time delay and ready-made connections, or that allow parts such as the coil and contact set to be replaced.

Contactor Accessories Selection Guide