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Dold

DOLD AA9837

Technical Data

Measuring range max.: 600 Hz
Standard measuring range: 30 - 90 Hz
1- / 3-phase: 1
Operate delay: Yes
Output contacts: 1 C/O contact, 2 C/O contacts
Width: 45 mm
Enclosure design: Switch cabinet
Auxiliary voltage required: Yes
Type: AA 9837

 

The frequency relay can be used especially in applications where the rotor frequency of a slip-ring motor must be measured. The rotor frequency is reciprocal proportional to the speed (see diagram rotor frequency at contercurrent braking). This behaviour allows to find speed depending switching values and can be used for start up and contercurrent braking of motors on cranes.

Datasheet: Click here

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