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 and frequency.


The factor that you need to measure will decide which monitoring relay you choose.

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Part Details Brand Stock 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 Dimensions Height Minimum Frequency Sensed Minimum Voltage Sensed Maximum Voltage Sensed Frequency Sensitivity Width Number of Poles Special Features Standards Met Current Range Operating Temperature Range Terminal Type Minimum Temperature Sensed Maximum Operating Temperature Mounting Type Length Maximum Temperature Sensed Maximum Frequency Sensed Minimum Operating Temperature Series
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Siemens Non-Fused Switch Disconnector
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Eaton Current Monitoring Relay, 24 → 240 V ac/dc Supply Voltage, 1 Phase
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Eaton Current Monitoring Relay, 24 → 240 V ac/dc Supply Voltage, 1 Phase
  • $ 203.00
  • Each
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3 Please note that the Stock level on this page is periodically updated during the day.

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24 → 240 V ac/dc Please note that the Stock level on this page is periodically updated during the day.

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- - - 22.5 x 109.5 x 78 mm Please note that the Stock level on this page is periodically updated during the day.

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78mm Please note that the Stock level on this page is periodically updated during the day.

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-25 → +60 °C Please note that the Stock level on this page is periodically updated during the day.

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Screw Please note that the Stock level on this page is periodically updated during the day.

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EMR6 Please note that the Stock level on this page is periodically updated during the day.

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Eaton Phase, Voltage Monitoring Relay, 160 → 300 V ac Supply Voltage
  • $ 179.95
  • Each
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3 Please note that the Stock level on this page is periodically updated during the day.

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Phase, Voltage Please note that the Stock level on this page is periodically updated during the day.

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160 → 300 V ac Please note that the Stock level on this page is periodically updated during the day.

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22.5 x 109.5 x 78 mm Please note that the Stock level on this page is periodically updated during the day.

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78mm Please note that the Stock level on this page is periodically updated during the day.

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50Hz Please note that the Stock level on this page is periodically updated during the day.

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160 V ac Please note that the Stock level on this page is periodically updated during the day.

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300V ac Please note that the Stock level on this page is periodically updated during the day.

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- - - - -25 → +60 °C Please note that the Stock level on this page is periodically updated during the day.

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Screw Please note that the Stock level on this page is periodically updated during the day.

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DIN Rail Please note that the Stock level on this page is periodically updated during the day.

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EMR6 Please note that the Stock level on this page is periodically updated during the day.

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Eaton Phase, Voltage Monitoring Relay, 450 → 720 V ac Supply Voltage
  • $ 238.45
  • Each
  • Compare
  • RS Stock No. 179-3532
  • Brand Eaton
  • Mfr. Part No. EMR6-AWM720-I-1
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3 Please note that the Stock level on this page is periodically updated during the day.

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Phase, Voltage Please note that the Stock level on this page is periodically updated during the day.

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450 → 720 V ac Please note that the Stock level on this page is periodically updated during the day.

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45 x 109.5 x 78 mm Please note that the Stock level on this page is periodically updated during the day.

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78mm Please note that the Stock level on this page is periodically updated during the day.

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50Hz Please note that the Stock level on this page is periodically updated during the day.

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450 V ac Please note that the Stock level on this page is periodically updated during the day.

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720V ac Please note that the Stock level on this page is periodically updated during the day.

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- - - - -25 → +60 °C Please note that the Stock level on this page is periodically updated during the day.

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Screw Please note that the Stock level on this page is periodically updated during the day.

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DIN Rail Please note that the Stock level on this page is periodically updated during the day.

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45mm Please note that the Stock level on this page is periodically updated during the day.

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EMR6 Please note that the Stock level on this page is periodically updated during the day.

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Phoenix Contact Monitoring Relay, 24 V dc Supply Voltage
  • $ 186.60
  • Each
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Phoenix Contact Please note that the Stock level on this page is periodically updated during the day.

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3 Please note that the Stock level on this page is periodically updated during the day.

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- 24 V dc Please note that the Stock level on this page is periodically updated during the day.

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- - - - - - - - - - - - 22.5 x 102 x 106 mm Please note that the Stock level on this page is periodically updated during the day.

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106mm Please note that the Stock level on this page is periodically updated during the day.

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- - - - 102mm Please note that the Stock level on this page is periodically updated during the day.

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- - - 800 mA Please note that the Stock level on this page is periodically updated during the day.

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-20 → +70 °C Please note that the Stock level on this page is periodically updated during the day.

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Screw Please note that the Stock level on this page is periodically updated during the day.

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Horizontal Mount, Vertical Mount Please note that the Stock level on this page is periodically updated during the day.

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22.5mm Please note that the Stock level on this page is periodically updated during the day.

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- - -20°C Please note that the Stock level on this page is periodically updated during the day.

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SCK-C-MODBUS Please note that the Stock level on this page is periodically updated during the day.

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Broyce Control Please note that the Stock level on this page is periodically updated during the day.

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2 Please note that the Stock level on this page is periodically updated during the day.

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Voltage Please note that the Stock level on this page is periodically updated during the day.

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100 → 230 V ac/dc Please note that the Stock level on this page is periodically updated during the day.

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3 x SPNO Please note that the Stock level on this page is periodically updated during the day.

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- - - - - - - 1 s Please note that the Stock level on this page is periodically updated during the day.

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- - 48 → 63 Hz Please note that the Stock level on this page is periodically updated during the day.

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44 x 63.5 x 85 mm Please note that the Stock level on this page is periodically updated during the day.

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85mm Please note that the Stock level on this page is periodically updated during the day.

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48Hz Please note that the Stock level on this page is periodically updated during the day.

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- - - 63.5mm Please note that the Stock level on this page is periodically updated during the day.

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1 Please note that the Stock level on this page is periodically updated during the day.

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- - Maximum of 5 A Please note that the Stock level on this page is periodically updated during the day.

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-20 → +60 °C Please note that the Stock level on this page is periodically updated during the day.

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Screw Please note that the Stock level on this page is periodically updated during the day.

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DIN Rail Mount Please note that the Stock level on this page is periodically updated during the day.

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44mm Please note that the Stock level on this page is periodically updated during the day.

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- 63Hz Please note that the Stock level on this page is periodically updated during the day.

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-20°C Please note that the Stock level on this page is periodically updated during the day.

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-
Eaton Current Monitoring Relay, 24 → 240 V ac/dc Supply Voltage, 1 Phase
  • $ 113.89
  • Each
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Eaton Please note that the Stock level on this page is periodically updated during the day.

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2 Please note that the Stock level on this page is periodically updated during the day.

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Current Please note that the Stock level on this page is periodically updated during the day.

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24 → 240 V ac/dc Please note that the Stock level on this page is periodically updated during the day.

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- - 1 Please note that the Stock level on this page is periodically updated during the day.

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0.03 A, 0.1 A, 1 A Please note that the Stock level on this page is periodically updated during the day.

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- 0.1 → 30 s Please note that the Stock level on this page is periodically updated during the day.

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- - - 22.5 x 109.5 x 78 mm Please note that the Stock level on this page is periodically updated during the day.

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78mm Please note that the Stock level on this page is periodically updated during the day.

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- - - - 109.5mm Please note that the Stock level on this page is periodically updated during the day.

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- - - 0.003 → 0.03 A, 0.01 → 0.1 A, 0.1 → 1 A Please note that the Stock level on this page is periodically updated during the day.

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-25 → +60 °C Please note that the Stock level on this page is periodically updated during the day.

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Screw Please note that the Stock level on this page is periodically updated during the day.

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- +60°C Please note that the Stock level on this page is periodically updated during the day.

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DIN Rail Please note that the Stock level on this page is periodically updated during the day.

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22.5mm Please note that the Stock level on this page is periodically updated during the day.

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- - -25°C Please note that the Stock level on this page is periodically updated during the day.

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EMR6 Please note that the Stock level on this page is periodically updated during the day.

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Eaton Insulation Monitoring Relay, 24 → 240 V ac/dc Supply Voltage
  • $ 489.39
  • Each
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Eaton Please note that the Stock level on this page is periodically updated during the day.

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2 Please note that the Stock level on this page is periodically updated during the day.

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Insulation Please note that the Stock level on this page is periodically updated during the day.

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24 → 240 V ac/dc Please note that the Stock level on this page is periodically updated during the day.

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- - - 0 → 400 V ac Please note that the Stock level on this page is periodically updated during the day.

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- - - - - - - - 45 x 109.5 x 78 mm Please note that the Stock level on this page is periodically updated during the day.

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78mm Please note that the Stock level on this page is periodically updated during the day.

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- 0 V ac Please note that the Stock level on this page is periodically updated during the day.

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400V ac Please note that the Stock level on this page is periodically updated during the day.

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- 109.5mm Please note that the Stock level on this page is periodically updated during the day.

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- - - - -25 → +60 °C Please note that the Stock level on this page is periodically updated during the day.

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Screw Please note that the Stock level on this page is periodically updated during the day.

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- +60°C Please note that the Stock level on this page is periodically updated during the day.

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DIN Rail Please note that the Stock level on this page is periodically updated during the day.

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45mm Please note that the Stock level on this page is periodically updated during the day.

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- - -25°C Please note that the Stock level on this page is periodically updated during the day.

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EMR6 Please note that the Stock level on this page is periodically updated during the day.

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Eaton Phase, Voltage Monitoring Relay, 160 → 300 V ac Supply Voltage
  • $ 94.50
  • Each
  • Compare
Eaton Please note that the Stock level on this page is periodically updated during the day.

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2 Please note that the Stock level on this page is periodically updated during the day.

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Phase, Voltage Please note that the Stock level on this page is periodically updated during the day.

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160 → 300 V ac Please note that the Stock level on this page is periodically updated during the day.

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- - - 160 → 300 V ac Please note that the Stock level on this page is periodically updated during the day.

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- - - - 0.1 → 30 s Please note that the Stock level on this page is periodically updated during the day.

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- - 50 → 60 Hz Please note that the Stock level on this page is periodically updated during the day.

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22.5 x 109.5 x 78 mm Please note that the Stock level on this page is periodically updated during the day.

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78mm Please note that the Stock level on this page is periodically updated during the day.

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50Hz Please note that the Stock level on this page is periodically updated during the day.

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160 V ac Please note that the Stock level on this page is periodically updated during the day.

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300V ac Please note that the Stock level on this page is periodically updated during the day.

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- 109.5mm Please note that the Stock level on this page is periodically updated during the day.

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- - - - -25 → +60 °C Please note that the Stock level on this page is periodically updated during the day.

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Screw Please note that the Stock level on this page is periodically updated during the day.

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- +60°C Please note that the Stock level on this page is periodically updated during the day.

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DIN Rail Please note that the Stock level on this page is periodically updated during the day.

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22.5mm Please note that the Stock level on this page is periodically updated during the day.

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- 60Hz Please note that the Stock level on this page is periodically updated during the day.

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-25°C Please note that the Stock level on this page is periodically updated during the day.

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EMR6 Please note that the Stock level on this page is periodically updated during the day.

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