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Frequency Relay The Multitek M200 series frequency relays are designed to monitor the frequency of a system and if the frequency deviates outside the adjustable pre-set limits, the relay will operate.Typically used in protecting generators against over or under speed, this is achieved as speed is proportional to frequency. Other uses such as monitoring mains power supplies, computer supplies etc. The user is provided with adjustment of both the trip point of frequency being monitored and the differential As is common with all the M200 relays; on over units the relay energizes when the input signal exceeds the trip point. On under units the relay de-energizes when the input signal goes below the trip point. A red LED indicates the state of the relay, whilst a green LED indicates the condition of the power supply. The frequency relays monitor their own power supply so no auxiliary power is necessary.
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