Dold Frequency Monitoring Relay, SPDT, DIN Rail - MK9143N.38 +/-5Hz UH=DC24V tv=0-20s tan=0-30s

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