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. 442-9449
Fabrikantnummer1SVR550871R9500
FabrikantABB
75,00 €
Each
Aantal stuks
Phase, Voltage 320 → 460 V ac SPST Overvoltage, Undervoltage 1, 3 320 → 460 V ac - - - Phase Failure 500 ms - - -
RS-stocknr. 806-5932
Fabrikantnummer1SVR750669R9400
FabrikantABB
292,00 €
Each
Aantal stuks
Insulation - - - - 0 → 1000 V dc, 0 → 690 V ac - - - - - - - -
RS-stocknr. 876-5005
Fabrikantnummer1SVR740722R1400
FabrikantABB
109,00 €
Each
Aantal stuks
Temperature 24 → 240 V ac/dc SPDT - - - - - - - <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. 876-5768
Fabrikantnummer1SVR730740R0300
FabrikantABB
207,00 €
Each
Aantal stuks
Temperature 24 → 240 V ac/dc SPDT - 3 - - - - - 20 ms Overtemperature, Temperature Window Monitoring, Undertemperature 0 → +200°C 13.5 → 440 Hz
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. 876-5014
Fabrikantnummer1SVR730700R0200
FabrikantABB
72,50 €
Each
Aantal stuks
Temperature 24 V ac/dc DPDT - - - - - - - <100 ms Overtemperature, Winding Temperature - -
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. 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. 775-8040
Fabrikantnummer1SVR740885R1300
FabrikantABB
213,00 €
Each
Aantal stuks
Phase, Voltage 90 → 170 V ac DPDT Overvoltage, Undervoltage 3 90 → 170 V ac - - - NEUTRAL, Phase Failure, Phase Imbalance, Phase Sequence 0 s, 0.1 → 30 s - - 45 → 65 Hz
RS-stocknr. 876-5020
Fabrikantnummer1SVR740700R2200
FabrikantABB
76,10 €
Each
Aantal stuks
Temperature 110 → 130 V ac, 220 → 240 V ac DPDT - 1 - - - - - <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. 876-2554
FabrikantnummerCM-UFD.M22
FabrikantABB
669,63 €
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 → 60 Hz
RS-stocknr. 775-7918
Fabrikantnummer1SVR730885R3300
FabrikantABB
207,00 €
Each
Aantal stuks
Phase, Voltage 180 → 280 V ac DPDT Overvoltage, Undervoltage 3 180 → 280 V ac - - - NEUTRAL, Phase Failure, Phase Imbalance, Phase Sequence 0 s, 0.1 → 30 s - - 45 → 65 Hz
RS-stocknr. 806-5957
Fabrikantnummer1SVR760669R9400
FabrikantABB
302,00 €
Each
Aantal stuks
Insulation - - - - 0 → 1000 V dc, 0 → 690 V ac - - - - - - - -
RS-stocknr. 775-8043
Fabrikantnummer1SVR740794R3300
FabrikantABB
198,00 €
Each
Aantal stuks
Phase, Voltage 300 → 500 V ac DPDT Overvoltage, Undervoltage 3 300 → 500 V ac - - - Phase Failure, Phase Sequence 0 s, 0.1 → 30 s - - 45 → 65 Hz
RS-stocknr. 876-5042
Fabrikantnummer1SVR740712R2200
FabrikantABB
80,54 €
Each
Aantal stuks
Temperature 110 → 130 V ac, 220 → 240 V ac DPDT - 1 - - - - - <100 ms Overtemperature, Winding Temperature - -
RS-stocknr. 775-7930
Fabrikantnummer1SVR730750R0400
FabrikantABB
221,00 €
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. 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. 876-5758
FabrikantnummerCM-TCS.11S
FabrikantABB
207,00 €
Each
Aantal stuks
Temperature 24 → 240 V ac/dc SPDT - 3 - - - - - 20 ms Overtemperature, Temperature Window Monitoring, Undertemperature -50 → +50°C 13.5 → 440 Hz