Operating Conditions

• Altitude: 1000‑3000 m
• Ambient air temperature: upper limit +40 °C, lower limit ‑25 °C
• Ambient relative humidity: daily average ≤95 %, monthly average ≤90 %
• Seismic intensity: not exceeding Grade 8
• Installation site: free from fire, explosion hazard, heavy contamination, chemical corrosion and severe vibration.

Product Features

• Scientific, rational design with innovative structure.
• Multi‑contact rotary‑type contact, good self‑cleaning performance and improved heat‑dissipation capacity.
• Contacts arranged on two planes, low operating torque, high withstand voltage and easy adjustment.
• Extended creepage distance strengthens insulation performance; the withstand voltage meets top‑level requirements.
• Bearings fitted on the rotating shaft for longer service life and smooth operation.