The FZN21 indoor high-voltage vacuum circuit breaker is suitable for three-phase AC power systems rated at 10kV and 50Hz, or with complete distribution equipment sets.High-voltage switchgearCombination substation systems and accessories are widely used in urban network construction and renovation projects, industrial and mining enterprises, high-rise buildings, and public facilities, serving as ring network power supply or terminal points. They play a crucial role in the distribution, control, and protection of electrical power. They offer numerous advantages, including high breaking capacity, safety and reliability, long electrical lifespan, frequent operability, compact structure, small size, light weight, and minimal maintenance requirements. They have the ability to break open-circuit rated current, overload current, short-circuit current, and prevent the equipment from running with missing phases. The switches feature clearly visible isolation points, are equipped with closing-capable earthing switches and electric spring mechanisms, and can be remotely controlled.

I. Environmental Conditions for Use:

Elevation: 2000m and below.

2. Environmental Temperature: -25℃ to +40℃.

3. Relative Humidity: Daily average not exceeding 95%, monthly average not exceeding 90%.

4. Areas free of conductive dust, corrosive gases, and steam.

5. Fire and explosion hazard-free areas.

6. No location with frequent violent vibrations.

II. Features:High-voltage vacuum circuit breakerEquipped with an electric operation mechanism and a storage spring for quick opening and closing operations. The isolating switch, vacuum switch, and grounding switch are interlocked to prevent incorrect operation.