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. 518-7174
Fabrikantnummer3UG4615-1CR20
FabrikantSiemens
190,80 €
Each
Aantal stuks
Phase, Voltage - DPDT Overvoltage, Undervoltage 3 160 → 690V ac - - - Phase Failure, Phase Sequence 0.1 → 20s - - -
RS-stocknr. 518-7297
Fabrikantnummer3UG4513-1BR20
FabrikantSiemens
131,40 €
Each
Aantal stuks
Phase, Voltage - DPDT Undervoltage 3 160 → 690V ac - - - Phase Failure, Phase Imbalance, Phase Sequence 0.1 → 20s - - -
RS-stocknr. 758-6930
Fabrikantnummer3UG4622-2AW30
FabrikantSiemens
111,70 €
Each
Aantal stuks
Current - SPDT - - - Overcurrent, Undercurrent 50mA 15A - 0.1 → 20s - - -
RS-stocknr. 518-7168
Fabrikantnummer3UG4622-1AW30
FabrikantSiemens
149,40 €
Each
Aantal stuks
Current - SPDT - 1 - Overcurrent, Undercurrent 50mA 10A - 0.1 → 20s - - -
RS-stocknr. 758-6942
Fabrikantnummer3UG4632-1AW30
FabrikantSiemens
73,29 €
Each
Aantal stuks
Voltage - SPDT Overvoltage, Undervoltage - 10 → 600V ac/dc - - - - 0.1 → 20s - - -
RS-stocknr. 758-6927
Fabrikantnummer3UG4501-1AW30
FabrikantSiemens
101,70 €
Each
Aantal stuks
- - SPDT - - - - - - - 0.3 → 10s - - -
RS-stocknr. 418-4988
Fabrikantnummer3RS1040-1GW50
FabrikantSiemens
320,40 €
Each
Aantal stuks
Temperature - DPDT - - - - - - - 0 → 999s Overtemperature, Undertemperature -50 → +500°C -
RS-stocknr. 758-6924
Fabrikantnummer3UG4512-1AR20
FabrikantSiemens
99,00 €
Each
Aantal stuks
Phase - SPDT - - 160 → 690V ac - - - Phase Failure, Phase Sequence - - - -
RS-stocknr. 758-6920
Fabrikantnummer3UG4511-1AN20
FabrikantSiemens
89,73 €
Each
Aantal stuks
Phase - SPDT - - 160 → 260V ac - - - Phase Sequence - - - -
RS-stocknr. 518-7275
Fabrikantnummer3UG4511-1BP20
FabrikantSiemens
103,50 €
Each
Aantal stuks
Phase - DPDT - 3 - - - - Phase Sequence - - - -
RS-stocknr. 758-6946
Fabrikantnummer3UG4633-1AL30
FabrikantSiemens
143,10 €
Each
Aantal stuks
Voltage - SPDT Overvoltage, Undervoltage - 17 → 275V ac/dc - - - - 0.1 → 20s - - -
RS-stocknr. 518-7051
Fabrikantnummer3UG4614-1BR20
FabrikantSiemens
147,60 €
Each
Aantal stuks
Phase, Voltage - DPDT Undervoltage 3 160 → 690V ac - - - Phase Failure, Phase Imbalance, Phase Sequence 0.1 → 20s - - -
RS-stocknr. 860-8693
Fabrikantnummer5TT3421
FabrikantSiemens
84,33 €
Each
Aantal stuks
- - - - - - - - - - - - - -
RS-stocknr. 518-7124
Fabrikantnummer3UG4621-1AW30
FabrikantSiemens
149,40 €
Each
Aantal stuks
Current - SPDT - 1 - Overcurrent, Undercurrent 3mA 500mA - 0.1 → 20s - - -
RS-stocknr. 175-2289
Fabrikantnummer3RN2012-2BW30
FabrikantSiemens
143,10 €
Each
Aantal stuks
Thermistor motor temperature protection - DPDT Motor Voltage - 24 → 240V ac/dc - - - - - - - -
RS-stocknr. 175-2294
Fabrikantnummer3RN2013-2BA30
FabrikantSiemens
166,50 €
Each
Aantal stuks
Thermistor motor temperature protection - DPDT Motor Voltage - - - - - - - - - -
RS-stocknr. 175-2275
Fabrikantnummer3RN2010-1CA30
FabrikantSiemens
71,91 €
Each
Aantal stuks
Thermistor motor temperature protection - SPDT Motor Voltage - - - - - - - - - -
RS-stocknr. 175-2277
Fabrikantnummer3RN2010-2BA30
FabrikantSiemens
77,76 €
Each
Aantal stuks
Thermistor motor temperature protection - DPDT Motor Voltage - - - - - - - - - -
RS-stocknr. 758-6933
Fabrikantnummer3UG4614-2BR20
FabrikantSiemens
157,50 €
Each
Aantal stuks
Phase - DPDT - - 160 → 690V ac - - - Phase Failure, Phase Sequence 0.1 → 20s - - -
RS-stocknr. 175-2272
Fabrikantnummer3RN2000-2AW30
FabrikantSiemens
62,01 €
Each
Aantal stuks
- - SPDT Motor Voltage - 24 → 240V ac/dc - - - - - - - -