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 $25.68 - AF16-30-10-11 24-60V50/60HZ 20-60VDC Contactor
ABB
SKU: AB_1SBL177001R1110
Model: AF16-30-10-11
SGD $30.40 - AF09-30-10-11 24-60V50/60HZ 20-60VDC Contactor
ABB
SKU: AB_1SBL137001R1110
Model: AF09-30-10-11
SGD $20.47 - TeSys D Contactor - 3P(3 NO) - AC-3 - <= 440 V 9 A - 220 V AC Coil.
Schneider
SKU: SE_LC1D09M7
Model: LC1D09M7
Special Price SGD $22.48 Regular Price SGD $27.95 - TeSys D - Auxiliary Contact Block - 2 NO - Screw-clamps Terminals
Schneider
SKU: SE_LADN20
Model: LADN20
SGD $15.86 - TeSys D - Auxiliary Contact Block - 1 NO + 1 NC - Screw-clamps Terminals
Schneider
SKU: SE_LADN11
Model: LADN11
SGD $15.86 - TeSys D - Auxiliary Contact Block - 3 NO + 1 NC - Screw-clamps Terminals
Schneider
SKU: SE_LADN31
Model: LADN31
SGD $22.04 - TeSys D - Auxiliary Contact Block - 2 NO + 2 NC - Screw-clamps Terminals
Schneider
SKU: SE_LADN22
Model: LADN22
SGD $22.04 - Thermal Overload Relay, TeSys LRD, 9...13 A, Class 10A
Schneider
SKU: SE_LRD16
Model: LRD16
Special Price SGD $25.46 Regular Price SGD $31.65 - TeSys GV2-Circuit Breaker-thermal-magnetic - 1...1.6 A - Screw Clamp Terminals
Schneider
SKU: SE_GV2ME06
Model: GV2ME06
Special Price SGD $58.21 Regular Price SGD $72.38 - TeSys D Contactor - 3P(3 NO) - AC-3 - <= 440 V 12 A - 220 V AC Coil.
Schneider
SKU: SE_LC1D12M7
Model: LC1D12M7
Special Price SGD $25.73 Regular Price SGD $32.00 - TeSys LRD Thermal Overload Relays - 0.63...1 A - Class 10A
Schneider
SKU: SE_LRD05
Model: LRD05
Special Price SGD $27.78 Regular Price SGD $34.54 - TeSys D Contactor - 3P(3 NO) - AC-3 - <= 440 V 32 A - 230 V AC 50/60 Hz Coil.
Schneider
SKU: SE_LC1D32P7
Model: LC1D32P7
Special Price SGD $63.23 Regular Price SGD $78.63 - TeSys D Contactor - 3P(3 NO) - AC-3 - <= 440 V 25 A - 220 V AC Coil.
Schneider
SKU: SE_LC1D25M7
Model: LC1D25M7
Special Price SGD $35.46 Regular Price SGD $67.98 - Motor Circuit Breaker, TeSys GV2, 3P, 6-10 A, Thermal Magnetic, Screw Clamp Terminals
Schneider
SKU: SE_GV2P14
Model: GV2P14
Special Price SGD $92.78 Regular Price SGD $115.37 - TeSys D Contactor - 3P(3 NO) - AC-3 - <= 440 V 9 A - 110 V AC Coil.
Schneider
SKU: SE_LC1D09F7
Model: LC1D09F7
Special Price SGD $22.48 Regular Price SGD $27.95 - TeSys D - Auxiliary Contact Block - 4 NO - Screw Clamp Terminals
Schneider
SKU: SE_LADN40
Model: LADN40
SGD $22.04 - TeSys GV2-Circuit Breaker-thermal-magnetic - 2.5...4 A - Screw Clamp Terminals
Schneider
SKU: SE_GV2ME08
Model: GV2ME08
Special Price SGD $58.21 Regular Price SGD $72.38 - Thermal Overload Relay, TeSys LRD, 16...24 A, Class 10A
Schneider
SKU: SE_LRD22
Model: LRD22
Special Price SGD $32.25 Regular Price SGD $40.10 - Thermal Overload Relay, TeSys LRD, 23...32 A, Class 10A
Schneider
SKU: SE_LRD32
Model: LRD32
Special Price SGD $43.46 Regular Price SGD $54.04 - TeSys LRD Thermal Overload Relays - 7...10 A - Class 10A
Schneider
SKU: SE_LRD14
Model: LRD14
Special Price SGD $25.46 Regular Price SGD $31.65 - TeSys D Contactor - 3P(3 NO) - AC-3 - <= 440 V 9 A - 230 V AC Coil.
Schneider
SKU: SE_LC1D09P7
Model: LC1D09P7
Special Price SGD $22.48 Regular Price SGD $27.95 - TeSys D Contactor - 3P(3 NO) - AC-3 - <= 440 V 9 A - 24 V DC Coil.
Schneider
SKU: SE_LC1D09BD
Model: LC1D09BD
SGD $61.39 - TeSys GV2, surface mount enclosure, for TeSys GV2ME, IP55 rated
Schneider
SKU: SE_GV2MC02
Model: GV2MC02
SGD $47.04