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
79,50 €
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
309,00 €
Each
Aantal stuks
Insulation - - - - 0 → 1000 V dc, 0 → 690 V ac - - - - - - - -
RS-stocknr. 876-5014
Fabrikantnummer1SVR730700R0200
FabrikantABB
77,00 €
Each
Aantal stuks
Temperature 24 V ac/dc DPDT - - - - - - - <100 ms Overtemperature, Winding Temperature - -
RS-stocknr. 876-5768
Fabrikantnummer1SVR730740R0300
FabrikantABB
219,00 €
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. 876-5023
Fabrikantnummer1SVR730712R1400
FabrikantABB
140,00 €
Each
Aantal stuks
Temperature 24 → 240 V ac/dc SPDT - - - - - - - <100 ms Overtemperature, Winding Temperature - -
RS-stocknr. 806-5917
Fabrikantnummer1SVR750660R0200
FabrikantABB
580,00 €
Each
Aantal stuks
Insulation 24 → 240 V ac/dc DPDT - - 0 → 400 V ac, 0 → 600 V dc - - - - - - - -
RS-stocknr. 876-5005
Fabrikantnummer1SVR740722R1400
FabrikantABB
116,00 €
Each
Aantal stuks
Temperature 24 → 240 V ac/dc SPDT - - - - - - - <100 ms Overtemperature, Winding Temperature - -
RS-stocknr. 876-5033
Fabrikantnummer1SVR730712R2200
FabrikantABB
84,00 €
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
604,00 €
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. 876-4985
Fabrikantnummer1SVR730720R1400
FabrikantABB
110,00 €
Each
Aantal stuks
Temperature 24 → 240 V ac/dc SPDT - - - - - - - <100 ms Overtemperature, Winding Temperature - -
RS-stocknr. 876-5051
Fabrikantnummer1SVR740712R1300
FabrikantABB
185,00 €
Each
Aantal stuks
Temperature 24 → 240 V ac/dc DPDT - - - - - - - <100 ms Overtemperature, Winding Temperature - -
RS-stocknr. 876-5752
FabrikantnummerCM-TCS.11P
FabrikantABB
225,00 €
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
RS-stocknr. 876-4989
Fabrikantnummer1SVR740720R1400
FabrikantABB
113,00 €
Each
Aantal stuks
Temperature 24 → 240 V ac/dc SPDT - - - - - - - <100 ms Overtemperature, Winding Temperature - -
RS-stocknr. 876-5783
FabrikantnummerCM-TCS.22S
FabrikantABB
180,00 €
Each
Aantal stuks
Temperature 24 V ac/dc SPDT - 3 - - - - - 20 ms Overtemperature, Temperature Window Monitoring, Undertemperature 0 → +100°C 45 → 65 Hz
RS-stocknr. 442-9001
Fabrikantnummer1SVR550882R9500
FabrikantABB
72,50 €
Each
Aantal stuks
Phase 380 → 440 V ac SPST - 1, 3 - - - - Phase Failure 150 ms - - -
RS-stocknr. 775-7911
Fabrikantnummer1SVR730884R4300
FabrikantABB
248,00 €
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 → 440 Hz
RS-stocknr. 876-4995
Fabrikantnummer1SVR730700R2100
FabrikantABB
59,50 €
Each
Aantal stuks
Temperature 110 → 130 V ac, 220 → 240 V ac SPDT - 1 - - - - - <100 ms Overtemperature, Winding Temperature - -
RS-stocknr. 775-7936
Fabrikantnummer1SVR730824R9300
FabrikantABB
103,00 €
Each
Aantal stuks
Phase 200 → 500 V ac DPDT - 3 - - - - Phase Failure, Phase Sequence 500 ms - - 45 → 65 Hz
RS-stocknr. 775-8015
Fabrikantnummer1SVR730841R1400
FabrikantABB
184,00 €
Each
Aantal stuks
Current 220 → 240 V ac 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. 775-7983
Fabrikantnummer1SVR730840R0500
FabrikantABB
218,00 €
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