Monitoring Relays

Monitoring relays are a type of relay that trips a circuit breaker when a fault is detected. A relay is an electrically controlled switch that is used to turn the power on or off in a circuit. 




Monitoring relays are more sophisticated than regular relays, as they have adjustable operating conditions, whereas normal relays switch according to a fixed threshold. They measure a given parameter, such as voltage or temperature, and will trip a circuit breaker when the parameter gets too high or low. 




What are monitoring relays used for?


Monitoring relays have a wide range of uses, depending largely on the factor being monitored. For example, they can protect against overcurrent if measuring current, or they can detect an abnormally low frequency if frequency is being measured.




Types of monitoring relay


The main way in which monitoring relays differ is the function that they measure. This can be a number of things, including:



  • voltage

  • current

  • temperature

  • frequency


The factor that you need to measure will decide which monitoring relay you choose.


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Omschrijving Prijs Monitoring Application Supply Voltage Contact Configuration Voltage Sensitivity Electrical Phase Voltage Sensing Range Current Sensitivity Minimum Current Sensed Maximum Current Sensed Phase Sensitivity Time Delay Temperature Sensitivity Temperature Sensing Range Frequency Sensing Range
RS-stocknr. 775-7983
Fabrikantnummer1SVR730840R0500
FabrikantABB
€ 205,95
Each
Aantal stuks
Current 24 → 240 V ac/dc DPDT - 1 - Overcurrent, Undercurrent 0.3 A, 1 A, 3 A 1.5 A, 5 A, 15 A - 0 s, 0.1 → 30 s - - 50 → 60 Hz
RS-stocknr. 775-7902
Fabrikantnummer1SVR730884R3300
FabrikantABB
€ 196,00
Each
Aantal stuks
Phase, Voltage 300 → 500 V ac DPDT Overvoltage, Undervoltage 3 300 → 500 V ac - - - Phase Failure, Phase Imbalance, Phase Sequence 0 s, 0.1 → 30 s - - 45 → 65 Hz
RS-stocknr. 775-8018
Fabrikantnummer1SVR730841R1500
FabrikantABB
€ 174,00
Each
Aantal stuks
Current 220 → 240 V ac DPDT - 1 - Overcurrent, Undercurrent 0.3 A, 1 A, 3 A 1.5 A, 5 A, 15 A - 0 s, 0.1 → 30 s - - 50 → 60 Hz
RS-stocknr. 876-5014
Fabrikantnummer1SVR730700R0200
FabrikantABB
€ 72,50
Each
Aantal stuks
Temperature 24 V ac/dc DPDT - - - - - - - <100 ms Overtemperature, Winding Temperature - -
RS-stocknr. 876-5045
Fabrikantnummer1SVR730712R1200
FabrikantABB
€ 135,00
Each
Aantal stuks
Temperature 24 → 240 V ac/dc DPDT - - - - - - - <100 ms Overtemperature, Winding Temperature - -
RS-stocknr. 775-8037
Fabrikantnummer1SVR740840R0400
FabrikantABB
€ 211,00
Each
Aantal stuks
Current 24 → 240 V ac/dc DPDT - 1 - Overcurrent, Undercurrent 0.1 A, 3 mA, 10 mA 1 A, 30 mA, 100 mA - 0 s, 0.1 → 30 s - - 50 → 60 Hz
RS-stocknr. 876-5011
Fabrikantnummer1SVR730700R2200
FabrikantABB
€ 72,50
Each
Aantal stuks
Temperature 110 → 130 V ac, 220 → 240 V ac DPDT - 1 - - - - - <100 ms Overtemperature, Winding Temperature - -
RS-stocknr. 876-5023
Fabrikantnummer1SVR730712R1400
FabrikantABB
€ 130,55
Each
Aantal stuks
Temperature 24 → 240 V ac/dc SPDT - - - - - - - <100 ms Overtemperature, Winding Temperature - -
RS-stocknr. 876-5058
Fabrikantnummer1SVR730712R1300
FabrikantABB
€ 170,00
Each
Aantal stuks
Temperature 24 → 240 V ac/dc DPDT - - - - - - - <100 ms Overtemperature, Winding Temperature - -
RS-stocknr. 775-7977
Fabrikantnummer1SVR730840R0200
FabrikantABB
€ 188,00
Each
Aantal stuks
Current 24 → 240 V ac/dc SPDT - 1 - Overcurrent, Undercurrent 0.1 A, 3 mA, 10 mA 1 A, 30 mA, 100 mA - - - - -
RS-stocknr. 876-4995
Fabrikantnummer1SVR730700R2100
FabrikantABB
€ 56,00
Each
Aantal stuks
Temperature 110 → 130 V ac, 220 → 240 V ac SPDT - 1 - - - - - <100 ms Overtemperature, Winding Temperature - -
RS-stocknr. 775-7961
Fabrikantnummer1SVR730831R0400
FabrikantABB
€ 174,00
Each
Aantal stuks
Voltage 110 → 130 V ac DPDT Overvoltage, Undervoltage 1 3 → 30 V, 6 → 60 V, 30 → 300 V, 60 → 600 V - - - - 0 s, 0.1 → 30 s - - -
RS-stocknr. 775-7955
Fabrikantnummer1SVR730830R0400
FabrikantABB
€ 205,95
Each
Aantal stuks
Voltage 24 → 240 V ac/dc DPDT Overvoltage, Undervoltage 1 3 → 30 V, 6 → 60 V, 30 → 300 V, 60 → 600 V - - - - 0 s, 0.1 → 30 s - - -
RS-stocknr. 806-5917
Fabrikantnummer1SVR750660R0200
FabrikantABB
€ 547,00
Each
Aantal stuks
Insulation 24 → 240 V ac/dc DPDT - - 0 → 400 V ac, 0 → 600 V dc - - - - - - - -
RS-stocknr. 876-5033
Fabrikantnummer1SVR730712R2200
FabrikantABB
€ 79,00
Each
Aantal stuks
Temperature 110 → 130 V ac, 220 → 240 V ac DPDT - 1 - - - - - <100 ms Overtemperature, Winding Temperature - -
RS-stocknr. 876-2557
FabrikantnummerCM-UFD.M31
FabrikantABB
€ 602,67
Each
Aantal stuks
Frequency, Voltage 24 → 240 V ac/dc SPDT Overvoltage, Undervoltage 1, 3 0 → 312 (2 Wire) V ac, 0 → 312 (4 Wire) V ac, 0 → 540 (3 Wire) V ac - - - - ±20 ms - - 40 → 70 Hz
RS-stocknr. 806-5939
Fabrikantnummer1SVR740670R0200
FabrikantABB
€ 200,00
Each
Aantal stuks
Insulation 24 → 240 V ac/dc DPDT - - 0 → 250 V ac, 0 → 300 V dc - - - - - - - -
RS-stocknr. 442-9411
Fabrikantnummer1SVR550824R9100
FabrikantABB
€ 78,88
Each
Aantal stuks
Phase 208 → 440 V ac SPDT - 3 - - - - Phase Failure, Phase Sequence 500 ms - - -
RS-stocknr. 775-7936
Fabrikantnummer1SVR730824R9300
FabrikantABB
€ 90,27
Each
Aantal stuks
Phase 200 → 500 V ac DPDT - 3 - - - - Phase Failure, Phase Sequence 500 ms - - 45 → 65 Hz
RS-stocknr. 775-7885
Fabrikantnummer1SVR730774R3300
FabrikantABB
€ 182,00
Each
Aantal stuks
Phase 300 → 500 V ac DPDT - 3 - - - - Phase Failure, Phase Imbalance, Phase Sequence 0 s, 0.1 → 30 s - - -