Dold MH9837.12 5-600HZ UH AC/DC110-230V Safety relay, Part N: 0061395

The frequency relays MK 9837N and MH 9837 are used for frequency monitoring of AC voltages. They are used for monitoring the output frequenc of frequency converters (/050) or for monitoring the rotor frequency of slip ring motors. Further areas of application are the monitoring of drives in crane systems, as well as the frequency monitoring of the supply voltage in rail vehicles.