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Compact Frequency relay for varied applications 

 

The actual range of frequency relays produced by DOLD has been exten-ded by 2 additional devices. Both models detect under or over frequency in AC voltage systems. The varimeter IK9143 needs no auxiliary supply and is suitable to monitor frequency in 50/60Hz systems like generator sets and local power generation. The inexpensive module has a setting range of ± 10% and an adjustable hysteresis. 

The more powerful varimeter IL9837 includes...

 

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