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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Siemens SIRIUS Innovation 3RT2 3 Pole Contactor - 12 A, 24 V dc Coil, 3NO, 5.5 kW
VND4,426,899.84 -
Schneider Electric TeSys D LC1D 3 Pole Contactor - 25 A, 440 V dc Coil, 3NO, 7.5 kW
VND4,434,189.76 -
Eaton xStart DILM 3 Pole Contactor - 25 A, 24 V dc Coil, 3NO, 11 kW
VND4,470,831.20 -
Schneider Electric TeSys Contactor Coil for use with LC1F265, LC1F330
VND4,477,929.28 -
Schneider Electric TeSys D LC1D 3 Pole Contactor - 25 A, 220 V ac Coil, 3NO, 11 kW
VND4,480,615.04 -
Eaton xStart DILM 3 Pole Contactor - 32 A, 24 V dc Coil, 3NO, 15 kW
VND4,520,325.92 -
Eaton xStart DILM 3 Pole Contactor - 25 A, 24 V dc Coil, 3NO, 11 kW
VND4,524,546.40 -
Schneider Electric Acti 9 iCT 3 Pole Contactor - 63 A, 230 V ac Coil, 3NO
VND4,541,236.48 -
Schneider Electric Thermal Overload Relay - 1NO + 1NC, 37 → 50 A F.L.C, 50 A Contact Rating, TeSys
VND4,542,387.52 -
ABB AF Range AF26Z 3 Pole Contactor - 45 A, 24 V ac/dc Coil, 3NO, 11 kW
VND4,635,046.24 -
ABB AF Range AF52 3 Pole Contactor - 100 A, 230 V ac Coil, 3NO, 22 kW
VND4,640,801.44 -
Eaton xStart DILM 3 Pole Contactor - 32 A, 24 V ac Coil, 3NO, 15 kW
VND4,672,263.20 -
Eaton xStart DILM 3 Pole Contactor - 32 A, 24 V ac Coil, 3NO, 15 kW
VND4,672,263.20 -
Siemens SIRIUS Innovation 3RT2 3 Pole Contactor - 16 A, 24 V dc Coil, 3NO, 7.5 kW
VND4,674,373.44 -
Siemens SIRIUS Innovation 3RT2 3 Pole Contactor - 16 A, 24 V dc Coil, 3NO, 7.5 kW
VND4,700,271.84 -
ABB Jokab AFS 3 Pole Safety Contactor - 45 A, 24 V dc Coil, 3NO
VND4,700,463.68 -
Schneider Electric TeSys D LC1D 4 Pole Contactor - 40 A, 230 V ac Coil, 2NO + 2NC
VND4,738,831.68 -
ABB Thermal Overload Relay - 1NO + 1NC, 29 → 42 A F.L.C, 42 A Contact Rating, 3.24 W, 3P, A Line
VND4,747,656.32 -
Eaton Overload Relay - 1NO + 1NC, 3 A Contact Rating, 2 W, 24 → 240 Vac/dc, EMT
VND4,834,368.00 -
Schneider Electric TeSys D LC1D 3 Pole Contactor - 50 A, 24 V ac Coil, 3NO, 18.5 kW
VND4,858,539.84 -
Siemens SIRIUS Innovation Auxiliary Contact - 1NC + 1NO, 2 Contact, Plug In, 1 A dc, 2.5 A ac
VND4,880,409.60 -
Schneider Electric TeSys D LC2D 3 Pole Reversing Contactor - 9 A, 24 V dc Coil, 3NO, 4 kW
VND4,907,459.04 -
Schneider Electric TeSys D LC1D 3 Pole Contactor - 40 A, 230 V ac Coil, 3NO, 18.5 kW
VND4,991,676.80