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 Terminal Type Current Range Maximum Frequency Sensed Series Minimum Operating Temperature Width Minimum Temperature Sensed Maximum Temperature Sensed Special Features Standards Met Height Frequency Sensitivity Length Maximum Operating Temperature Mounting Type Operating Temperature Range Number of Poles Dimensions Minimum Frequency Sensed Maximum Voltage Sensed Minimum Voltage Sensed
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Schneider Electric Voltage Monitoring Relay, 690 V Supply Voltage, 3 Phase
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Eaton Phase, Voltage Monitoring Relay, 300 → 500 V ac Supply Voltage
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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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Screw 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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EMR6 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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109.5mm 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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- 22.5mm 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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-25 → +60 °C 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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50Hz Please note that the Stock level on this page is periodically updated during the day.

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500V ac Please note that the Stock level on this page is periodically updated during the day.

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

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

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

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

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208 → 480 V ac 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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- - - - - - - - - - - - - -20°C 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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- - - - 90mm Please note that the Stock level on this page is periodically updated during the day.

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- 99mm 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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- 3 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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6 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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1 x SPDT 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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Screw 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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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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66.5mm Please note that the Stock level on this page is periodically updated during the day.

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- - - - 89mm Please note that the Stock level on this page is periodically updated during the day.

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- 17.5mm 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 Mount 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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1 Please note that the Stock level on this page is periodically updated during the day.

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17.5 x 66.5 x 89 mm 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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- -
Schneider Electric Please note that the Stock level on this page is periodically updated during the day.

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

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

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380 → 480 V ac Please note that the Stock level on this page is periodically updated during the day.

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

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Overvoltage 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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<100 V ac Please note that the Stock level on this page is periodically updated during the day.

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- - - - 30 s 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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10 (DC) mA, 8 (AC) A Please note that the Stock level on this page is periodically updated during the day.

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- Zelio Control 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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79.5mm Please note that the Stock level on this page is periodically updated during the day.

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- - - - 90mm Please note that the Stock level on this page is periodically updated during the day.

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- 22.9mm Please note that the Stock level on this page is periodically updated during the day.

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+50 (60 Hz) °C, +60 (50 Hz) °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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-20 → +50 (60 Hz) °C, -20 → +60 (50 Hz) °C Please note that the Stock level on this page is periodically updated during the day.

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- 22.9 x 79.5 x 90 mm Please note that the Stock level on this page is periodically updated during the day.

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- 480V ac Please note that the Stock level on this page is periodically updated during the day.

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

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

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

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

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380 → 480 V ac Please note that the Stock level on this page is periodically updated during the day.

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

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Overvoltage, Undervoltage 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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<100 V ac 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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10 (DC) mA, 8 (AC) A Please note that the Stock level on this page is periodically updated during the day.

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- Zelio Control 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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79.5mm Please note that the Stock level on this page is periodically updated during the day.

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- - - - 90mm Please note that the Stock level on this page is periodically updated during the day.

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- 22.9mm Please note that the Stock level on this page is periodically updated during the day.

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+50 (60 Hz) °C, +60 (50 Hz) °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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-20 → +50 (60 Hz) °C, -20 → +60 (50 Hz) °C Please note that the Stock level on this page is periodically updated during the day.

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- 22.9 x 79.5 x 90 mm Please note that the Stock level on this page is periodically updated during the day.

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- 480V ac Please note that the Stock level on this page is periodically updated during the day.

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

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Eaton Phase, Voltage Monitoring Relay, 180 → 280 V ac Supply Voltage
  • $ 207.84
  • Each
  • Compare
  • RS Stock No. 179-3536
  • Brand Eaton
  • Mfr. Part No. 184770 & EMR6-AWN280-D-1
Eaton Please note that the Stock level on this page is periodically updated during the day.

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4 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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180 → 280 V ac Please note that the Stock level on this page is periodically updated during the day.

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- - - 180 → 280 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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Screw 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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EMR6 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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109.5mm 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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- 22.5mm 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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-25 → +60 °C 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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50Hz Please note that the Stock level on this page is periodically updated during the day.

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280V ac Please note that the Stock level on this page is periodically updated during the day.

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

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