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. 102-6135
FabrikantRS PRO
€ 50,69
Each
Aantal stuks
Phase, Voltage - SPDT Undervoltage - - - - - Phase Failure, Phase Sequence 100ms - - 48 → 63Hz
RS-stocknr. 102-6136
FabrikantRS PRO
€ 53,30
Each
Aantal stuks
Phase, Voltage - SPDT Undervoltage - - - - - Phase Failure, Phase Sequence 0.2 → 10s - - 48 → 63Hz
RS-stocknr. 102-6133
FabrikantRS PRO
€ 93,50
Each
Aantal stuks
Voltage - SPDT Overvoltage, Undervoltage - - - - - - 0.1 → 30s - - 48 → 63Hz
RS-stocknr. 102-6134
FabrikantRS PRO
€ 93,50
Each
Aantal stuks
Current - SPDT - - - Overcurrent, Undercurrent 1A 10A - 0.1 → 30s - - 48 → 63Hz
RS-stocknr. 102-6131
FabrikantRS PRO
€ 53,30
Each
Aantal stuks
Voltage - SPDT Overvoltage, Undervoltage - - - - - - 0.2 → 10s - - 48 → 63Hz
RS-stocknr. 102-6137
FabrikantRS PRO
€ 68,59
Each
Aantal stuks
Phase, Voltage - SPDT Overvoltage, Undervoltage - - - - - Phase Failure, Phase Sequence 0.2 → 10s - - 48 → 63Hz
RS-stocknr. 102-6130
FabrikantRS PRO
€ 47,34
Each
Aantal stuks
Voltage - SPDT Undervoltage - 12 → 24V dc - - - - 0 → 30s - - -
RS-stocknr. 240-8939
FabrikantnummerBA9043 3AC50-400Hz 230/400V
FabrikantDold
€ 218,42
Each
Aantal stuks
Voltage - DPDT Undervoltage - - - - - - - - - -
RS-stocknr. 392-7289
Fabrikantnummer3RN1010-1CM00
FabrikantSiemens
€ 86,40
Each
Aantal stuks
Thermistor motor protection relay - SPDT - - - - - - - - Overtemperature, Undertemperature +60 → +180°C -
RS-stocknr. 146-238
FabrikantnummerRM17TG20
€ 63,27
Each
Aantal stuks
Phase - DPDT - - - - - - Phase Asymmetry, Phase Failure, Phase Sequence <100ms - - -
RS-stocknr. 146-200
FabrikantnummerRM35JA31MW
€ 141,71
Each
Aantal stuks
Current - DPDT - - - Overcurrent, Undercurrent 2mA 500mA - 0.3 → 30s - - -
RS-stocknr. 857-7696
FabrikantnummerDPB01CM48
FabrikantCarlo Gavazzi
€ 238,59
Each
Aantal stuks
Phase, Voltage - SPDT Overvoltage, Undervoltage - 323 → 550V ac - - - Phase Loss, Phase Sequence 1 s, 6s - - -
RS-stocknr. 857-7416
FabrikantnummerPPA01CM44
FabrikantCarlo Gavazzi
€ 111,85
Each
Aantal stuks
Phase, Voltage - SPDT - - 177 → 475V ac - - - Phase Loss, Phase Sequence - - - -
RS-stocknr. 327-7679
FabrikantnummerIK9179.11 3AC50/60Hz 400V
FabrikantDold
€ 72,92
Each
Aantal stuks
Phase - SPDT - - - - - - Phase Sequence - - - -
RS-stocknr. 775-7983
Fabrikantnummer1SVR730840R0500
FabrikantABB
€ 157,25
Each
Aantal stuks
Current - DPDT - - - Overcurrent, Undercurrent 0.3 A, 1 A, 3A 1.5 A, 5 A, 15A - 0 s, 0.1 → 30s - - 50 → 60Hz
RS-stocknr. 124-0193
FabrikantnummerRM35LM33MW
€ 56,52
Each
Aantal stuks
Level - DPDT - - - - - - - 0.1 → 5s - - -
RS-stocknr. 445-9052
FabrikantnummerIL5881.12/100 DC12-280V 5-200kOHM
FabrikantDold
€ 218,85
Each
Aantal stuks
Voltage 12 → 280 V dc DPDT - - - - - - - 0.5 → 20 s - - -
RS-stocknr. 727-1256
FabrikantnummerPUA01CB23500V
FabrikantCarlo Gavazzi
€ 67,42
Each
Aantal stuks
Current, Voltage - SPDT Overvoltage - 0.4 → 500 V ac, 2 → 500V dc Overcurrent - - - <300ms - - -
RS-stocknr. 146-480
FabrikantnummerRM35TF30
€ 130,86
Each
Aantal stuks
Phase, Voltage - DPDT Overvoltage, Undervoltage - 194 → 528V ac - - - Phase Asymmetry, Phase Failure, Phase Sequence 0.1 → 10s - - -
RS-stocknr. 837-7490
Fabrikantnummer84873029
FabrikantCrouzet
€ 74,85
Each
Aantal stuks
Phase, Voltage - SPDT Overvoltage - 183 → 528V ac - - - Phase Failure, Phase Sequence ≤650ms - - -