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.
Showing 97–120 of 613 results
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Schneider Electric TeSys D LC1D 3 Pole Contactor - 12 A, 230 V ac Coil, 3NO, 5.5 kW
VND0.00 -
ABB AF Range AF26 3 Pole Contactor - 17 A, 24 V ac/dc Coil, 3NO, 11 kW
VND2,661,971.84 -
Schneider Electric TeSys D LC1D 4 Pole Contactor - 60 A, 24 V ac Coil, 2NO + 2NC
VND8,231,087.04 -
Schneider Electric Acti 9 Auxiliary Contact -
VND8,383,024.32 -
ABB Jokab AFS 3 Pole Safety Contactor - 45 A, 20 → 60 V dc, 24 → 60 V @ 50/60 Hz Coil, 3NO
VND3,382,714.72 -
ABB Jokab AFS 3 Pole Safety Contactor - 45 A, 24 V dc Coil, 3NO
VND4,700,463.68 -
ABB Jokab AFS 3 Pole Safety Contactor - 25 A, 24 V dc Coil, 3NO
VND2,441,547.68 -
Schneider Electric TeSys K LP1K 3 Pole Contactor - 12 A, 24 V dc Coil, 3NO, 5.5 kW
VND2,521,544.96 -
ABB Jokab AFS 3 Pole Safety Contactor - 70 A, 20 → 60 V dc, 24 → 60 V @ 50/60 Hz Coil, 3NO
VND7,212,608.48 -
Schneider Electric TeSys K LP1K 3 Pole Contactor - 12 A, 24 V dc Coil, 3NO, 5.5 kW
VND1,455,490.08 -
ABB Jokab AFS 3 Pole Safety Contactor - 125 A, 20 → 60 V dc, 24 → 60 V @ 50/60 Hz Coil, 3NO
VND12,190,089.12 -
Siemens SIRIUS Innovation 3RT2 3 Pole Contactor - 40 A, 24 V ac/dc Coil, 3NO, 18.5 kW
VND7,884,815.84 -
Schneider Electric TeSys K LC1K 3 Pole Contactor - 9 A, 24 V ac Coil, 3NO, 4 kW
VND1,136,843.84 -
Schneider Electric TeSys Surge Suppressor for use with 3P LC1D40A, 4P LC1DT60A
VND748,559.68 -
Lovato Contactor Relay - 1NO + 1NC, 82 A F.L.C, 82 A Contact Rating, 3P, RF11
VND5,823,495.04 -
Schneider Electric TeSys Signalling Contacts Auxiliary Contact
VND924,093.28 -
Siemens SENTRON Auxiliary Contact - 2NO, 2 Contact, DIN Rail Mount, 6 A
VND1,214,922.72 -
Schneider Electric TeSys Auxiliary Contact - 1NC + 1NO, 2 Contact, Side Mount, 6 A
VND680,648.32 -
Siemens SENTRON 5TT 4 Pole Contactor - 40 A, 24 V ac/dc Coil, 4NO
VND4,282,252.48 -
Schneider Electric TeSys Pneumatic Timer
VND3,716,132.64 -
Schneider Electric TeSys Pneumatic Timer
VND1,948,902.56 -
Schneider Electric TeSys Pneumatic Timer
VND4,222,398.40 -
Schneider Electric TeSys Pneumatic Timer
VND2,117,721.76
