Frequency Monitor

Frequency Monitor 42-58Hz Over, Under & Window Switch selectable

When power is applied with terminal 6 + 7 linked the relay energises immediately ignoring frequency conditions for ±10 seconds. Without link 6 + 7, the relay will only energise when the frequency is within the pre-set limits. The unit can be used for over or under conditions, as well as over and under window sensing limits. LED indication is offered for both over and under frequency faults. The relay de-energises if there is deviation from these set limits. The Hysteresis is set to 0,5Hz to prevent relay chatter during small deviations in frequency.