Skip to product information
1 of 1




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

View full details


  • About us

    IAM is managed by Dipl. Ing. Reza Müller. Through many years of professional practice he has extensive experience in the Industry. IAM offers their customers ...

    Read more 
  • Our team

    At IAM we build a team of young and experienced people. Because of this we can give our clients the best possible experience.

    Read more