XGN66-12(Z) Fixed Metal-Enclosed Switchgear

The XGN66-12(Z) is our latest medium voltage switchgear solution, designed to meet national GB3906 and international IEC60298 standards. With a compact build—50% smaller than standard **switchboards**—it integrates reliable circuit breakers and a secure “five-prevention” interlock system. Ideal for power distribution in power plants, substations, industrial sites, and high-rise buildings, this switchgear ensures seamless control and monitoring.

Product Advantages

Extremely Compact Design: The volume is about 50% of traditional switchgear, greatly saving space in electrical rooms.

Safe and Convenient Maintenance: Equipped with a rotary isolator switch, allowing for maintenance of the breaker room while the busbars are energized, without affecting the power supply.

Complete Five-Interlock Mechanism: Fully mechanical forced locking, reliable logic, simple operation, and full protection against misoperation.

Sturdy and Reliable Cabinet: Corner steel welded frame, high strength, complete grounding system, and suitable for harsh working conditions.

Excellent Protection and Layout: Protection degree IP2X, front cable wiring, and observation window, providing clear and convenient installation and maintenance.

High Cost-Performance: Fixed design, no complex moving parts, lower manufacturing and operational costs than trolley-type cabinets.

Operating Conditions

Altitude: Not exceeding **1000m** above sea level.

Ambient Temperature: **-25°C to +40°C**, with the 24-hour average temperature not exceeding **35°C**.

Ground Inclination: ≤ **3°**.

Seismic Intensity: ≤ **8 levels**.

Installation Environment: Free from severe vibrations, explosions, and hazardous conditions.

Application

The XGN66-12(Z) switchgear is mainly used in indoor power distribution systems ranging from 3.6kV to 12kV, and is widely applied in substations, industrial and mining enterprises, municipal and building power distribution, serving as a key device for receiving, distributing and protecting electric energy.

Model meaning

Technical Parameters

Overall and mounting dimensions(mm)（Reference）

Model meaning

XGN66-12(Z) Fixed Metal-Enclosed Switchgear	X:	Box-type structure
	G:	Fixed installation
	N:	Indoor use
	66:	Design series number
	12:	Rated voltage 12kV
	Z:	Vacuum switch

Technical Parameters

Item	Parameter
Rated Voltage	12kV
Rated Frequency	50Hz
Rated Current	630A / 1250A
Rated Short-Circuit Breaking Current	20kA / 25kA / 31.5kA
Rated Short-Time Withstand Current (4s)	20kA / 25kA / 31.5kA
Rated Peak Withstand Current	50kA / 63kA / 80kA
Power Frequency Withstand Voltage (1min)	Phase-to-phase, phase-to-ground 42kV; Breaker 48kV
Lightning Impulse Withstand Voltage	Phase-to-phase, phase-to-ground 75kV; Breaker 85kV
Insulation Class	Class F
Degree of Protection	IP2X
Environmental Conditions	Indoor use
Busbar Type	Three-phase AC, “品字” (Pinyin: pǐn zì) arrangement
Operating Mechanism	Spring mechanism
Interlocking Type	Mechanical five-prevention interlocking
Compatible Circuit Breakers	VS1 (ZN63A), ZN28 series vacuum circuit breakers

Overall and mounting dimensions(mm)（Reference）

(The values can be customized according to local project requirements.)

If you have specific requirements for the parameters, structure, or configuration of the XGN66‑12(Z) fixed metal‑enclosed switchgear, please contact us. Our team of account managers, technical engineers, and product consultants will review your electrical system layout, rated parameters, installation environment, protection needs, and project timeline to deliver a tailored solution that fits your application scenario with precision.

We can customize the rated voltage levels, rated current capacity, busbar configuration, circuit breaker type, enclosure protection grade, operating mechanisms, compartment layout, and other key design details to ensure optimal performance and safety in your medium‑voltage power distribution network. Whether your project is in a power plant, substation, industrial facility, municipal building, or infrastructure application, we’ll help you define the right specifications for secure and reliable operation.

FAQ

What is XGN66‑12Z fixed metal enclosed switchgear?

XGN66‑12Z is a type of fixed metal enclosed switchgear designed for 12kV AC power distribution systems. It is used for controlling, protecting, and distributing electrical energy in industrial and commercial power networks.

What applications is the XGN66‑12Z switchgear suitable for?

XGN66‑12Z switchgear is suitable for power distribution and protection in medium-voltage systems. It is widely used in substations, industrial plants, commercial buildings, and high‑voltage energy distribution networks.

What is the rated voltage of the XGN66‑12Z switchgear?

The XGN66‑12Z is rated for 12kV AC voltage, making it ideal for medium‑voltage power distribution in industrial and utility sectors.

What protection features does the XGN66‑12Z switchgear offer?

The switchgear includes mechanical interlocks, metal‑enclosed compartments, high‑voltage circuit breakers, and load break switches, providing robust protection for both operators and electrical systems.

What are the main components of XGN66‑12Z switchgear?

Key components include the metal enclosure, circuit breakers, load break switches, earthing switches, and instrument transformers, which ensure safe and efficient power distribution.

What are the advantages of metal‑enclosed switchgear like the XGN66‑12Z?

The metal‑enclosed design offers enhanced safety by containing all high‑voltage components in metal enclosures, reducing the risk of electrical faults and improving durability in harsh environments.

How does the XGN66‑12Z switchgear facilitate maintenance?

The fixed metal enclosure allows for easy access to all components for regular inspections and maintenance. Clear compartmentalization also simplifies servicing while ensuring safety during operation.

What is the protection level of the XGN66‑12Z switchgear?

The XGN66‑12Z is typically rated for IP4X or higher protection, ensuring that the internal components are shielded from dust and moisture, maintaining operational integrity in various environmental conditions.

What standards does the XGN66‑12Z switchgear comply with?

XGN66‑12Z complies with international standards such as IEC 62271 for medium-voltage switchgear and GB/T 11022 for safety and performance in electrical systems.

Can the XGN66‑12Z switchgear be customized for specific projects?

Yes. The XGN66‑12Z switchgear can be tailored to meet specific project requirements, including custom configurations, protection devices, and auxiliary control systems, based on operational needs and site conditions.

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Nearly 20 Years of Industry Experience

10,000⁺ Units/Year Production Capacity

40,000^m²+ Factory Area

500⁺ Power Utility Clients

1 Billion⁺ CNY Annual Sales Revenue

XGN66-12(Z) Fixed Metal-Enclosed Switchgear