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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Nombre de résultats par page
Description Prix 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
N° de stock RS 890-3884
Référence fabricant2902065
102,29 €
Each
Unité
Current, Voltage 9.6 30 V dc - - - 1.25 10 V dc Overcurrent 2.5mA 20mA - - - - -
N° de stock RS 890-3887
Référence fabricant2905597
89,72 €
Each
Unité
Voltage 177 794 V ac DPDT Undervoltage 3 - - - - Phase Failure, Phase Sequence - - - 48 63 Hz
N° de stock RS 890-3875
Référence fabricant2902035
149,87 €
Each
Unité
Current, Voltage 9.6 30 V dc SPDT - - 0 12 V Overcurrent 0mA 24mA - - - - -
N° de stock RS 715-7986
Référence fabricant2900177
197,54 €
Each
Unité
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 - -
N° de stock RS 801-6218
Référence fabricant2866022
173,87 €
Each
Unité
Current 24 240 V ac/dc DPDT - 1 - Overcurrent, Undercurrent 0A 0.1 A, 1 A, 10 A - 0.1 10 s - - -
N° de stock RS 181-2032
Référence fabricant2901674
160,08 €
Each
Unité
- 24 V dc - - - - - - - - - - - -
N° de stock RS 801-6224
Référence fabricant2866035
116,06 €
Each
Unité
Voltage 24 230 V ac, 24 V dc SPDT Undervoltage 1 0 300 V ac/dc - - - - 0.2 10 s - - -
N° de stock RS 801-6227
Référence fabricant2866019
117,01 €
Each
Unité
Current 24 230 V ac, 24 V dc SPDT - 1 - Overcurrent 0A 0.1 A, 1 A, 10 A - 0.2 10 s - - -
N° de stock RS 801-6220
Référence fabricant2866048
173,87 €
Each
Unité
Voltage 24 240 V ac/dc DPDT Overvoltage, Undervoltage 1 0 300 V ac/dc - - - - 0.1 10 s - - -
N° de stock RS 181-2033
Référence fabricant2903242
184,98 €
Each
Unité
Current - - - - - - 0A 20A - - - - -
N° de stock RS 171-7045
Référence fabricant2906252
75,50 €
Each
Unité
Temperature 230 V ac SPDT - - - - - - - - Winding Temperature - -
N° de stock RS 181-2031
Référence fabricant2903241
236,23 €
Each
Unité
Current Via SCK-C-MODBUS - - - - - 0A 20A - - - - -
N° de stock RS 181-2035
Référence fabricant2903591
188,45 €
Each
Unité
Voltage 24 V dc - - - 2 10 V dc - - - - - - - -
N° de stock RS 181-2030
Référence fabricant2963598
130,04 €
Each
Unité
- 24 V dc - - - 19.2 28.8 V dc - - - - - - - -
N° de stock RS 801-6236
Référence fabricant2866051
112,58 €
Each
Unité
Voltage 24 230 V ac, 24 V dc SPDT Window, Without Neutral Conductor Connection 3 280 520 V ac - - - - 0.2 10 s - - -
N° de stock RS 801-6233
Référence fabricant2866064
173,87 €
Each
Unité
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 - - -