Low-Voltage Withdrawable Switchgear

This series of low-voltage withdrawable switchgear is suitable for use in power plants, substations, petrochemical industries, metallurgical and steel plants, transportation and energy sectors, light industry, defense facilities, as well as industrial and mining enterprises, residential areas, and high-rise buildings.
It is used in power systems with AC 50–60 Hz and rated operating voltage up to 660 V for power conversion, distribution, and control. Its technical performance has reached the advanced international level of the 1990s.
This equipment complies with national standards such as GB 7251.1 (Low-voltage switchgear and controlgear assemblies – Part 1) and JB/T 9961 (Low-voltage withdrawable switchgear assemblies), and also conforms to international standards such as IEC 439-1 and VDE 0660 Part 5.

1.Ambient temperature: Not higher than +40°C and not lower than −5°C. The average temperature within 24 hours shall not exceed +35°C.
2.Atmospheric conditions: The air shall be clean. Relative humidity shall not exceed 50% at the maximum temperature of +40°C; higher relative humidity is permissible at lower temperatures (e.g., up to 90% at +20°C). However, condensation may occasionally occur due to temperature variations.
3.Altitude: Not exceeding 2000 m.
4.Pollution level: Class III.
5.Transportation and storage conditions: Suitable for transport and storage at temperatures from −25°C to +55°C, and for short periods (not exceeding 24 hours) up to +70°C. Under these extreme conditions, the equipment shall not suffer any irreversible damage and shall operate normally under standard conditions.

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