Class 8501 Type SZF Relay

The Static Frequency Sensitive (SZF) relays are recommended for use in AC wound rotor motor circuits to monitor motor frequency and operate an output relay at a specific programmed frequency. They are used on AC crane control panels.



  • User programmable

  • Frequency set points for relay pick-up and drop-out

  • Output relay contact is user programmable as normally open or normally closed

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