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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Beskrivning Pris 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-artikelnummer 715-7986
Tillv. art.nr2900177
VarumärkePhoenix Contact
2 128,39 kr
Each
Enheter
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-artikelnummer 181-2031
Tillv. art.nr2903241
VarumärkePhoenix Contact
2 878,23 kr
Each
Enheter
Current Via SCK-C-MODBUS - - - - - 0A 20A - - - - -
RS-artikelnummer 181-2032
Tillv. art.nr2901674
VarumärkePhoenix Contact
1 803,32 kr
Each
Enheter
- 24 V dc - - - - - - - - - - - -
RS-artikelnummer 181-2033
Tillv. art.nr2903242
VarumärkePhoenix Contact
2 162,69 kr
Each
Enheter
Current - - - - - - 0A 20A - - - - -
RS-artikelnummer 171-7045
Tillv. art.nr2906252
VarumärkePhoenix Contact
636,85 kr
Each
Enheter
Temperature 230 V ac SPDT - - - - - - - - Winding Temperature - -
RS-artikelnummer 181-2035
Tillv. art.nr2903591
VarumärkePhoenix Contact
1 804,35 kr
Each
Enheter
Voltage 24 V dc - - - 2 10 V dc - - - - - - - -
RS-artikelnummer 801-6224
Tillv. art.nr2866035
VarumärkePhoenix Contact
1 268,14 kr
Each
Enheter
Voltage 24 230 V ac, 24 V dc SPDT Undervoltage 1 0 300 V ac/dc - - - - 0.2 10 s - - -
RS-artikelnummer 890-3875
Tillv. art.nr2902035
VarumärkePhoenix Contact
1 693,09 kr
Each
Enheter
Current, Voltage 9.6 30 V dc SPDT - - 0 12 V Overcurrent 0mA 24mA - - - - -
RS-artikelnummer 801-6218
Tillv. art.nr2866022
VarumärkePhoenix Contact
1 859,93 kr
Each
Enheter
Current 24 240 V ac/dc DPDT - 1 - Overcurrent, Undercurrent 0A 0.1 A, 1 A, 10 A - 0.1 10 s - - -
RS-artikelnummer 801-6233
Tillv. art.nr2866064
VarumärkePhoenix Contact
1 775,39 kr
Each
Enheter
Phase, Voltage 24 230 V ac, 24 V dc DPDT Undervoltage, Window 3 280 520 V ac - - - Phase Asymmetry, Phase Failure, Phase Sequence 0.1 10 s - - -
RS-artikelnummer 181-2030
Tillv. art.nr2963598
VarumärkePhoenix Contact
898,16 kr
Each
Enheter
- 24 V dc - - - 19.2 28.8 V dc - - - - - - - -
RS-artikelnummer 890-3887
Tillv. art.nr2905597
VarumärkePhoenix Contact
862,17 kr
Each
Enheter
Voltage 177 794 V ac DPDT Undervoltage 3 - - - - Phase Failure, Phase Sequence - - - 48 63 Hz
RS-artikelnummer 801-6227
Tillv. art.nr2866019
VarumärkePhoenix Contact
1 268,14 kr
Each
Enheter
Current 24 230 V ac, 24 V dc SPDT - 1 - Overcurrent 0A 0.1 A, 1 A, 10 A - 0.2 10 s - - -
RS-artikelnummer 890-3884
Tillv. art.nr2902065
VarumärkePhoenix Contact
1 155,69 kr
Each
Enheter
Current, Voltage 9.6 30 V dc - - - 1.25 10 V dc Overcurrent 2.5mA 20mA - - - - -
RS-artikelnummer 801-6220
Tillv. art.nr2866048
VarumärkePhoenix Contact
1 859,93 kr
Each
Enheter
Voltage 24 240 V ac/dc DPDT Overvoltage, Undervoltage 1 0 300 V ac/dc - - - - 0.1 10 s - - -
RS-artikelnummer 801-6236
Tillv. art.nr2866051
VarumärkePhoenix Contact
1 202,38 kr
Each
Enheter
Voltage 24 230 V ac, 24 V dc SPDT Window, Without Neutral Conductor Connection 3 280 520 V ac - - - - 0.2 10 s - - -