A monitoring relay is the kind of relay that trips an electrical circuit when it detects any defect. A relay is a controlled switch that is used to turn the power on or off in a circuit. Monitoring relays are more sophisticated than standard relays because monitoring relays have adjustable operating conditions, whereas standard relays switch according to some fixed threshold. They typically measure a provided parameter, such as temperature or voltage and trip the circuit breaker when it goes too low or high.
Types of Monitoring Relay
The function indicates the main difference between relays that they measure and include a few things like voltage, temperature, current, and frequency. Therefore, you need to choose a monitoring relay based on what factor you will measure. Always make sure to match the relay with the factor to be measured to get accurate results and performance.
Applications of Monitoring Relays
Monitoring relays have various applications, mainly depending on the factor to be monitored. For example, they can protect against overcurrent by measuring the current and sense if it gets too high or low, or they can sense an unusually low frequency if you are measuring the frequency.
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