Dold Frequency Monitoring Relay, SPDT, DIN Rail

Monitoring of local generator sets and voltage supplies For precise frequency measuring with fast response time High disturbance immunity Separately adjustable trip points and separate outputs for over- and under frequency (1 or 2 c/o each) MK 9143N / MH 9143: Trip points adjustable precisely and reproducible on 10 step rotational switch in the range of ± 0,1 Hz to ± 5 Hz related to 50 or 60 Hz Nominal frequency 50 or 60 Hz selectable Fixed hysteresis optimised for trip point As option one common output for under and over frequency “;Window”;-mode (MK 9143N/400 / MH 9143/400) Variable alarm value in the range of 45 to 65 Hz Hysteresis adjustable for under- and over frequency separatelyadjustable 0 …20% Common output for under and over frequency “;Window”;-mode can be selected Start up delay 0…30 s selectable Manual or auto reset selectable Output relay energized or de-energized on trip selectable for over frequency Output relay de-energized on trip for under frequency Universal frequency measuring input for AC 40 … 550V Several options for auxiliary supply LED indicators for auxiliary supply, input frequency, over and under frequency alarm