1. Working environment

· Environmental temperature: -40°C (min) to 65 °C (max).
· Altitude: no more than 4,500 meter.
· Ambient humidity: daily average ≤ 95%, monthly average ≤ 90%.
· Atmospheric environment: no fire, explosion hazard, serious pollution, chemical corrosion.
· Seismic intensity: ≤ 8.

2. Standards & Specifications

The switchgear is designed and manufactured in accordance with the following standards:
· IEC 62271-1: 2021 High-voltage switchgear and controlgear - Part 1: Common specifications for alternating current switchgear and controlgear
· IEC 62271-100: 2021 High-voltage switchgear and controlgear - Part 100: Alternating-current circuitbreakers
· IEC 62271-102: 2022 EXV Extended version High-voltage switchgear and controlgear - Part 102: Alternating current disconnectors and earthing switches
· IEC 62271-200: 2021 High-voltage switchgear and controlgear - Part 200: AC metal-enclosed switchgear and controlgear for rated voltages above 1kV and up to and including 52kV
· IEC 60529: 1989+AMD1:1999+AMD2: 2013 CSV Consolidated version Degrees of protection provided by enclosures (IP Code)