E. Dold & Söhne GmbH & Co. KG

Tel.: +49 7723 654-0
E-Mail: dold-relays@dold.com

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Direct contact for orders

Tel.: +49 7723 654-454
E-Mail: ab@dold.com

Direct contact for technical questions

Tel.: +49 7723 654-459
E-Mail: rv@dold.com

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Tel.: +49 7723 654-455
AA 9838

Frequency Relay

AA 9838

Contacts

Auxiliary voltage

Measuring range

Variant

  • 0019306
  • AA9838.11 20-80HZ UH AC50/60HZ 230V
The frequency relay can be used especially in applications where the rotor frequency of a... more

Product description

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.

Technical specifications

Enclosure design: Switch cabinet
Width: 45 mm
Operate delay: Yes
Output contacts: 1 Wechsler
1- / 3-phase: 1
Auxiliary voltage required: Yes
Standard measuring range: 20 - 80 Hz
Measuring range max.: 80 Hz
Type: AA 9838

Features

  • According IEC/EN 60255, DIN VDE 0435-303
  • Detection of under- or overfrequency
  • Adjustable response value
  • Optionally 1 or 2 changeover contacts
  • Width 45 mm