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 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 Length Special Features Maximum Temperature Sensed Maximum Voltage Sensed Minimum Voltage Sensed Frequency Sensitivity Current Range Minimum Frequency Sensed Operating Temperature Range Number of Poles Series Terminal Type Height Dimensions Minimum Operating Temperature Minimum Temperature Sensed Width Mounting Type Maximum Operating Temperature
Schneider Electric Voltage Monitoring Relay
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Schneider Electric Voltage Monitoring Relay
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Carlo Gavazzi Current Monitoring Relay With SPDT Contacts
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Carlo Gavazzi Earth Leakage Monitoring Relay With SPDT Contacts, 1, 3 Phase
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Carlo Gavazzi Earth Leakage Monitoring Relay With SPDT Contacts, 1, 3 Phase
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