Contactors and Protection Relays
A contactor is an electrical switching device that is used for switching an electrical circuit on and off. It is a special type of relay, but there is a basic difference between the contactor and a relay. The contactor is mostly used in applications where higher current carrying capacity is involved, while the relays are used for lower current applications.
Contactors are compact and can be field-mounted easily. Usually, these devices feature multiple contacts. The contacts are mostly normally open, and they provide operating power to the load whenever the contactor coil is powered. Contactors are popularly used with electric motors.
There are different types of contactors, and the various types have their own sets of features, applications, and capabilities. Contactors can take over a vast range of currents, ranging from a few to thousands of amperes, and voltage from 25VDC to thousands of volts. Furthermore, these devices come in various sizes, from small hand-held dimensions to large sizes measuring up to a meter or a yard on one side.
Protection Relays are widely used in most systems or applications such as panel-built control systems to advanced interface systems. It will be able to detect faulty sections and cut them off from the rest of the system. Consider it as a switch as it can open and close circuits electromechanically and electronically.
Let’s take a power system as an example, the reliability of power is crucial in a power system, and it consists of generators, transformers, distribution circuits, and others. Power system failure must be detected and failed components have to be disconnected immediately in order to run smoothly without any interruption.
Therefore, protection relays are useful for determining the fault quickly to prevent interruption.
- AF12-30-10-11 24-60V50/60HZ 20-60VDC Contactor (Clearance Sale)
ABB
SKU: AB_1SBL157001R1110
Model: AF12-30-10-11
SGD $2.17 - AF09-30-10-11 24-60V50/60HZ 20-60VDC Contactor
ABB
SKU: AB_1SBL137001R1110
Model: AF09-30-10-11
SGD $20.19 - AF16-30-10-11 24-60V50/60HZ 20-60VDC Contactor
ABB
SKU: AB_1SBL177001R1110
Model: AF16-30-10-11
SGD $31.09 - TeSys LRD Thermal Overload Relays - 0.63...1 A - Class 10A
Schneider
SKU: SE_LRD05
Model: LRD05
SGD $34.54 - TeSys D - Auxiliary Contact Block - 1 NO + 1 NC - Screw-clamps Terminals
Schneider
SKU: SE_LADN11
Model: LADN11
SGD $15.86 - TeSys D Contactor - 3P(3 NO) - AC-3 - <= 440 V 18 A - 24 V DC Coil.
Schneider
SKU: SE_LC1D18BD
Model: LC1D18BD
SGD $92.98 - TeSys D Contactor - 3P(3 NO) - AC-3 - <= 440 V 9 A - 220 V AC Coil.
Schneider
SKU: SE_LC1D09M7
Model: LC1D09M7
SGD $27.95 - TeSys D - Auxiliary Contact Block - 2 NO - Screw-clamps Terminals
Schneider
SKU: SE_LADN20
Model: LADN20
SGD $15.86 - TeSys LRD Thermal Overload Relays - 1...1.6 A - Class 10A
Schneider
SKU: SE_LRD06
Model: LRD06
SGD $34.54 - TeSys D Contactor - 3P(3 NO) - AC-3 - <= 440 V 32 A - 24 V DC Coil.
Schneider
SKU: SE_LC1D32BL
Model: LC1D32BL
SGD $126.77 - Motor Circuit Breaker, TeSys GV2, 3P, 6-10 A, Thermal Magnetic, Screw Clamp Terminals
Schneider
SKU: SE_GV2P14
Model: GV2P14
SGD $115.37 - TeSys D Contactor - 3P(3 NO) - AC-3 - <= 440 V 25 A - 220 V AC Coil.
Schneider
SKU: SE_LC1D25M7
Model: LC1D25M7
SGD $67.98 - TeSys K - Auxiliary Contact Block - 1 NO + 1 NC - Screw-clamps Terminals
Schneider
SKU: SE_LA1KN11
Model: LA1KN11
SGD $16.21 - Contactor, TeSys K, 3P, AC-3, lt or eq to 440V 9A, 1 NO aux., 220 to 230VAC coil
Schneider
SKU: SE_LC1K0910M7
Model: LC1K0910M7
SGD $25.76 - TeSys D - Auxiliary Contact Block - 3 NO + 1 NC - Screw-clamps Terminals
Schneider
SKU: SE_LADN31
Model: LADN31
SGD $22.04 - TeSys GV2 & GV3 - Auxiliary Contact Block - 1 NO + 1 NC
Schneider
SKU: SE_GVAN11
Model: GVAN11
SGD $13.25 - TeSys LRD Thermal Overload Relays - 2.5...4 A - Class 10A
Schneider
SKU: SE_LRD08
Model: LRD08
SGD $31.65 - TeSys D - Auxiliary Contact Block - 2 NO - Screw-clamps Terminals
Schneider
SKU: SE_LAD8N20
Model: LAD8N20
SGD $21.70 - TeSys D Contactor - 3P(3 NO) - AC-3 - <= 440 V 9 A - 110 V AC Coil.
Schneider
SKU: SE_LC1D09F7
Model: LC1D09F7
SGD $27.95 - AX25-30-01-80 220-230V50Hz/230-240V60Hz Contactor
ABB
SKU: AB_1SBL931074R8001
Model: AX25-30-01-80
SGD $39.14 - AX18-30-01-80 220-230V50Hz/230-240V60Hz Contactor
ABB
SKU: AB_1SBL921074R8001
Model: AX18-30-01-80
SGD $25.77 - TeSys LRD Thermal Overload Relays - 4...6 A - Class 10A
Schneider
SKU: SE_LRD10
Model: LRD10
SGD $31.65