Contactors
All electric motors have a lifespan, and to keep them running efficiently and safely they must be protected. One of the main causes of failure is electrical overload, sometimes called overcurrent. When a motor draws more current than it is designed to handle it causes the temperature to build-up resulting in overheating. This damages motor windings and coils. It is important to protect the motor and its circuit, and this is where the use of contactor overload relays can help.RS Components offer an extensive range of high-quality contactor overload relays from leading industry brands including Schneider Electric, Siemens, ABB, Eaton, Lovato, and Rockwell Automation.What is overload protection?Overload is where a motor draws a high current above its rated value for an extended amount of time. Overload causes overheating of the motor causing damage. To prevent this from happening devices such as contactor relays are specifically designed for industrial control motor protection. They are used with contactors as part of a motor starter or in a control panel or centre.What are the different types of contactor overload relays?The motor protection devices can be classified into two main types which are thermal types and electronic types.Thermal overload relaysUtilise a bi-metallic plate located near a heating element. When excessive current is passed through the heating element N/C (Normally Closed) contacts switch over and opens contacts. This interrupts power from flowing to the contactor’s control circuit. Thermal overloads usually offer an adjustable current range as well as a manual or automatic reset option.Electronic RelaysElectronic overload relays don’t have a bi-metallic mechanism, Instead, they work by using components such as temperature sensors to measure the load current. They are generally more accurate than thermal devices and they usually have a wider current range, a selectable trip class provides enhanced trip protection against single phasing against the motor.
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Schneider Electric TeSys Pneumatic Timer
VND2,758,659.20 -
Schneider Electric TeSys Contactor Timer
VND2,810,647.84 -
Schneider Electric Contact for use with LC1D09 → LC1D38, LC1DT20 → LC1DT40
VND530,437.60 -
Siemens Sirius Innovation Contactor Surge Suppressor for use with 3RH2, Size S00
VND697,722.08 -
Siemens Sirius Classic Contactor Terminal Cover for use with S12, Size S10
VND1,904,395.68 -
Siemens Sirius Classic Contactor Contact for use with 3RT1064
VND24,763,474.56 -
Siemens Sirius Innovation Contactor Surge Suppressor for use with SIRIUS Contactors
VND818,581.28 -
Siemens Sirius Innovation Contactor Wiring Kit for use with 3RA2 Series
VND1,529,540.32 -
Schneider Electric Contact for use with TeSys, TeSys, GV2
VND3,231,352.96 -
Eaton Contactor Wiring Kit for use with DILM12 Series, DILM15 Series, DILM7 Series, DILM9 Series
VND571,107.68 -
Eaton Contactor Mounting Support for use with ZB65 Series
VND616,190.08 -
Schneider Electric Adapter for use with LR3D Series, LRD Series
VND1,438,800.00 -
Schneider Electric Contactor Latching Block for use with LC1 Series
VND1,750,348.16 -
Schneider Electric Connection Link
VND200,856.48 -
Schneider Electric Link for use with LC1 Series, LC2 Series
VND562,091.20 -
Schneider Electric Link for use with TeSys D Series
VND579,932.32 -
Schneider Electric Contactor Varistor for use with LC1 Series, LC2 Series
VND507,608.64 -
Schneider Electric Link for use with TeSys K Series
VND484,012.32 -
Schneider Electric Link for use with TeSys K Series
VND334,185.28 -
Schneider Electric Link for use with CA Series, LC Series, LP Series
VND410,729.44 -
Schneider Electric TeSys Holder for use with DF2CA Fuse Cartridge, DF2CN Fuse Cartridge
VND282,196.64 -
Eaton Contactor Cover for use with DILK12 to DILK25 Series, DILL Series, DILM17 to DILM32 Series, DILMP32 to DILMP45
VND559,405.44 -
Schneider Electric TeSys Contactor Coil for use with LC1F265, LC1F330
VND4,477,929.28 -
Schneider Electric Link for use with CA Series, LC Series, LP Series
VND371,977.76