Contactor Overload Relays

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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กำลังดูสินค้า 1 - 20 รายการจาก 994 รายการ / Viewing 1 - 20 of 994 products
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รายละเอียดสินค้า / Description ราคา / Price FLC Motor Rating Contact Current Rating Control Voltage Range Pole Configuration Mounting Style Contact Voltage Rating Series Normal State Configuration Supply Voltage Power Rating Reset Method Terminal Type Number Of Auxiliary Contacts
RS Stock No. 394-9330
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.LRD21
THB2,535.67
Each
Units
12 → 18 A 18 A - TeSys 3P Direct Contactor 690 V ac LRD NO/NC - - Automatic, Manual Screw 2
RS Stock No. 394-9403
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.LRD07
THB1,543.41
Each
Units
1.6 → 2.5 A 2.5 A - TeSys 3P Direct Contactor 690 V ac LRD NO/NC - - Automatic, Manual Screw 2
RS Stock No. 394-9380
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.LRD08
THB1,600.33
Each
Units
2.5 → 4 A 4 A - TeSys 3P Direct Contactor 690 V ac LRD NO/NC - - Automatic, Manual Screw 2
RS Stock No. 394-9368
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.LRD12
THB1,975.33
Each
Units
5.5 → 8 A 8 A - TeSys 3P Direct Contactor 690 V ac LRD NO/NC - - Automatic, Manual Screw 2
RS Stock No. 394-9346
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.LRD16
THB1,943.36
Each
Units
9 → 13 A 13 A - TeSys 3P Direct Contactor 690 V ac LRD NO/NC - 6 kV Automatic, Manual Screw 2
RS Stock No. 394-9324
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.LRD22
THB2,637.31
Each
Units
16 → 24 A 24 A - TeSys 3P Direct Contactor 690 V ac LRD NO/NC - - Automatic, Manual Screw 2
RS Stock No. 394-9318
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.LRD32
THB2,823.05
Each
Units
23 → 32 A 32 A - TeSys 3P Direct Contactor 690 V ac LRD NO/NC - 600 V Automatic, Manual Screw 2
RS Stock No. 394-9374
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.LRD10
THB1,474.04
Each
Units
4 → 6 A 6 A - TeSys 3P Direct Contactor 690 V ac LRD NO/NC - - Automatic, Manual Screw 2
RS Stock No. 394-9352
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.LRD14
THB1,713.40
Each
Units
7 → 10 A 10 A - TeSys 3P Direct Contactor 690 V ac LRD NO/NC - - Automatic, Manual Screw 2
RS Stock No. 122-9420
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.3RH2140-2BB40
Brand :Siemens
THB1,970.50
Each
Units
- 10 A 24 Vdc Sirius Innovation 4P DIN Rail Mount 690 V ac 3RH2 4NO - - - Screw 4
RS Stock No. 394-9425
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.LRD05
THB2,010.86
Each
Units
0.63 → 1 A 1 A - TeSys 3P Direct Contactor 690 V ac LRD NO/NC - - Automatic, Manual Screw 2
RS Stock No. 394-9419
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.LRD06
THB2,010.86
Each
Units
1 → 1.6 A 1.6 A - TeSys 3P Direct Contactor 690 V ac LRD NO/NC - - Automatic, Manual Screw 2
RS Stock No. 394-9267
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.LRD3359
THB4,416.68
Each
Units
48 → 65 A 65 A - TeSys 3P Direct Contactor 690 V ac LRD NO/NC - - Automatic, Manual Screw 2
RS Stock No. 608-7205
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.CA3KN31BD3
THB2,118.49
Each
Units
- 10 A - TeSys K - - 690 V dc CA3KN 3NO/NC - - - Screw -
RS Stock No. 513-0320
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.278460 & ZB65-65
Brand :Eaton
THB4,929.09
Each
Units
57 → 65 A 65 A 500 V ac - - Direct Contactor 690 V ac ZB65 NO/NC - 7.5 W Automatic, Manual Screw 2
RS Stock No. 727-6207
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.LRD325
THB3,358.59
Each
Units
17 → 25 A 25 A - TeSys D - DIN Rail Mount, Plate 1 kV ac LRD NO/NC - - - Screw 2
RS Stock No. 394-9431
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.LRD04
THB1,471.12
Each
Units
0.4 → 0.63 A 630 mA - TeSys 3P Direct Contactor 690 V ac LRD NO/NC - - Automatic, Manual Screw 2
RS Stock No. 727-6213
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.LRD350
THB3,568.55
Each
Units
37 → 50 A 50 A - TeSys - Under Contactor Mount 1 kV ac LRD NO/NC - - - Screw 2
RS Stock No. 608-7306
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.CAD32V7
THB1,904.76
Each
Units
- 10 A - TeSys - - 690 V ac CAD 3NO/2NC - - - Screw -
RS Stock No. 372-9029
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.LR2K0321
THB1,501.41
Each
Units
10 → 14 A 14 A 250 V dc, 690 V ac TeSys 3P Direct Contactor 690 V ac LR2K NO/NC - 100 W Automatic, Manual Screw 2