12kv 24kv Metal Clad Switchgear Metal Enclosed Switchgear

Overview 

AC metal enclosed switchgear of the armored withdrawable type delivers reliable reception, distribution, control, and protection for three-phase AC 50Hz power systems. This medium voltage switchgear adopts an all-metal modular assembly structure with CNC-processed aluminum-zinc steel plates, achieving high precision, strong corrosion resistance, and lightweight construction. Furthermore, its four independently sealed compartments — bus chamber, circuit breaker chamber, cable chamber, and relay instrument chamber — give this metal clad switchgear exceptional safety and operational flexibility.

Operating Conditions

• Ambient air temperature: maximum temperature +40℃, minimum temperature -15℃;

• Relative humidity: daily average relative humidity: ≤ 95%, daily average water vapor pressure does not exceed 2.2KPa; Monthly average

• relative humidity ≤ 90%; The average monthly steam pressure does not exceed 1.8KPa;

• Altitude: ≤ 1000m;

• Earthquake intensity: not more than 8 magnitude;

• The surrounding air should be free from corrosive or flammable gases, water vapor and other obvious pollution;

• No severe vibration site;

• If it is used under normal conditions beyond GB3906, the user and the Company shall negotiate.

Product Features

• Four Independent Sealed Compartments：This metal enclosed switchgear separates the bus, circuit breaker, cable, and relay rooms with individual pressure relief channels for maximum personnel protection.

• Withdrawable Handcart Design：The MVSG uses a mid-mounted withdrawable handcart with three positions — disconnect, test, and working — enabling safe operation and easy maintenance without powering down adjacent circuits.

• High-Capacity Cable Room：The electrical enclosure cabinet accommodates up to nine single-core cables per bay, providing exceptional flexibility for complex distribution layouts.

• Five-Prevention Interlock System：Every power distribution board unit meets full five-prevention mechanical and electrical interlock requirements, eliminating all common human-error operation risks.

• Wide Vacuum Circuit Breaker Compatibility：This mv switchgear accepts multiple series of vacuum circuit breakers with 100% interchangeable handcarts across the same specification, simplifying procurement and spare parts management.

• Front-Access Installation：This control equipment supports installation, debugging, and maintenance entirely from the front, enabling back-to-back arrangements that significantly reduce substation footprint.

• Busbar Arc Fault Containment：Heat-shrink bushing sleeves and insulation end caps on this medium voltage switchgear effectively contain any internal arc fault within the affected cabinet, preventing spread to adjacent units.