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. 801-6220
Fabrikantnummer2866048
FabrikantPhoenix Contact
€ 173,87
Each
Aantal stuks
Voltage 24 → 240 V ac/dc DPDT Overvoltage, Undervoltage 1 0 → 300 V ac/dc - - - - 0.1 → 10 s - - -
RS-stocknr. 890-3875
Fabrikantnummer2902035
FabrikantPhoenix Contact
€ 149,87
Each
Aantal stuks
Current, Voltage 9.6 → 30 V dc SPDT - - 0 → 12 V Overcurrent 0mA 24mA - - - - -
RS-stocknr. 801-6224
Fabrikantnummer2866035
FabrikantPhoenix Contact
€ 116,06
Each
Aantal stuks
Voltage 24 V dc, 24 → 230 V ac SPDT Undervoltage 1 0 → 300 V ac/dc - - - - 0.2 → 10 s - - -
RS-stocknr. 890-3884
Fabrikantnummer2902065
FabrikantPhoenix Contact
€ 102,29
Each
Aantal stuks
Current, Voltage 9.6 → 30 V dc - - - 1.25 → 10 V dc Overcurrent 2.5mA 20mA - - - - -
RS-stocknr. 801-6233
Fabrikantnummer2866064
FabrikantPhoenix Contact
€ 173,87
Each
Aantal stuks
Phase, Voltage 24 V dc, 24 → 230 V ac DPDT Undervoltage, Window 3 280 → 520 V ac - - - Phase Asymmetry, Phase Failure, Phase Sequence 0.1 → 10 s - - -
RS-stocknr. 890-3887
Fabrikantnummer2905597
FabrikantPhoenix Contact
€ 89,72
Each
Aantal stuks
Voltage 177 → 794 V ac DPDT Undervoltage 3 - - - - Phase Failure, Phase Sequence - - - 48 → 63 Hz
RS-stocknr. 801-6236
Fabrikantnummer2866051
FabrikantPhoenix Contact
€ 112,58
Each
Aantal stuks
Voltage 24 V dc, 24 → 230 V ac SPDT Window, Without Neutral Conductor Connection 3 280 → 520 V ac - - - - 0.2 → 10 s - - -
RS-stocknr. 181-2032
Fabrikantnummer2901674
FabrikantPhoenix Contact
€ 160,08
Each
Aantal stuks
- 24 V dc - - - - - - - - - - - -
RS-stocknr. 715-7986
Fabrikantnummer2900177
FabrikantPhoenix Contact
€ 197,54
Each
Aantal stuks
Current, Temperature, Voltage 110 → 500 V ac DPDT Overvoltage, Undervoltage 1, 3 0 → 480 V ac Overcurrent, Undercurrent 0.15A 12A - 0.1 → 50 s Overtemperature, Undertemperature - -
RS-stocknr. 801-6227
Fabrikantnummer2866019
FabrikantPhoenix Contact
€ 117,01
Each
Aantal stuks
Current 24 V dc, 24 → 230 V ac SPDT - 1 - Overcurrent 0A 0.1 A, 1 A, 10 A - 0.2 → 10 s - - -
RS-stocknr. 801-6218
Fabrikantnummer2866022
FabrikantPhoenix Contact
€ 173,87
Each
Aantal stuks
Current 24 → 240 V ac/dc DPDT - 1 - Overcurrent, Undercurrent 0A 0.1 A, 1 A, 10 A - 0.1 → 10 s - - -
RS-stocknr. 181-2033
Fabrikantnummer2903242
FabrikantPhoenix Contact
€ 184,98
Each
Aantal stuks
Current - - - - - - 0A 20A - - - - -
RS-stocknr. 181-2030
Fabrikantnummer2963598
FabrikantPhoenix Contact
€ 130,04
Each
Aantal stuks
- 24 V dc - - - 19.2 → 28.8 V dc - - - - - - - -
RS-stocknr. 171-7045
Fabrikantnummer2906252
FabrikantPhoenix Contact
€ 75,50
Each
Aantal stuks
Temperature 230 V ac SPDT - - - - - - - - Winding Temperature - -
RS-stocknr. 181-2031
Fabrikantnummer2903241
FabrikantPhoenix Contact
€ 236,23
Each
Aantal stuks
Current Via SCK-C-MODBUS - - - - - 0A 20A - - - - -
RS-stocknr. 181-2035
Fabrikantnummer2903591
FabrikantPhoenix Contact
€ 188,45
Each
Aantal stuks
Voltage 24 V dc - - - 2 → 10 V dc - - - - - - - -