XGN66-12(Z) Fixed Metal Enclosed Hight Voltage Distribution Electrical Switchgear

Key Features:

Space-Saving Design: With a footprint of only 50% of traditional switchgear cabinets, this unit is ideal for applications where efficiency and size are critical.

High Performance and Reliability: Utilizes advanced technology for stable and reliable performance. Circuit breaker has a good performance record with a “five prevention” interlocking mechanism that ensures operational ease and safety.

Multi-Application: This switchgear is utilized in various applications, including power plants, substations, industrial enterprises, high-rise buildings, and can be combined with ring network cabinets in switching stations.

Model meaning

Model:Xgn66-12(Z)	X:	Box Type Switchgear
	G:	Fixed Type
	N:	Indoor Type
	66:	Design Number
	12:	Rated Voltage (Kv)
	Z:	Vacuum Switch

Main technical parameters of vacuum circuit breaker:

Main technical parameters and component models of switch cabinet

No	project	Company	technical parameter
1	Rated voltage	kV	3.6,7.2, 12
2	Rated power frequency withstand voltage	kV	To ground, phase to phase: 42: fracture: 48
3	Rated lightning impulse withstand voltage	kV	To ground, interphase: 75: fracture: 85
4	Rated frequency	Hz	50
5	Rated current	A	630,1250,
6	Rated short-circuit breaking current (effective value)	kA	20,25,31.5,
7	Rated short-circuit making current (peak value)	kA	50,63, 80,
8	Rated dynamic stability current (peak value)	kA	50,63, 80
9	Rated thermal stability current 4S (effective value)	kA	20,25, 31.5
10	Degree of protection	mm	IP2X
11	Boundary dimension (W x D x H)	kg	900x 1000x 2300
12	weight	kV	≈600
13	Rated voltage	kV	3.6,7.2, 12

Conditions of Use:

Altitude: 1000 meters.
Ambient Temperature: From –25°C to +40°C, with a 24-hour mean not exceeding +35°C.
Inclination: Horizontal inclination should not exceed 3 degrees.
Seismic Conditions: The equipment is constructed to withstand earthquake intensities up to magnitude 8.
Vibration & Explosion: The instrument is not suited for locations where there is violent vibration, impact, or explosion risk.

Structural Features:

Durable Construction: The cabinet body is welded with high-quality angle steel to impart strength and durability.

Optimized Design: The circuit breaker room is located at the middle (lower) part of the cabinet to facilitate easy installation, debugging, and maintenance.

Pressure Release Channel: The VS1 standard circuit breaker is equipped with a pressure release channel to ensure safe operation and maintenance.

Rotary Isolating Switch: Utilizes an advanced, reliable rotary isolating switch to enable safe access to the circuit breaker room for maintenance while the main bus is live.

IP2X Protection Level: The entire cabinet is IP2X protected, isolating the internal components from dust and outdoor conditions.

Mechanical Locking Device: Equipped with a fully functional mechanical locking device, meeting all the “five prevention” requirements to ensure secure operation.

Reliable Grounding System: Incorporates a grounding system to prevent electric hazard.

Observation Window: The door has an observation window in glass which helps one view inside to easily assess the status of working conditions from inside the unit. This feature enhances ease of monitoring.

User-Friendly: Inclining cables of outgoing and incoming cable towards front provide better connection at front, enabling easier access to users.

Why XGN66-12(Z) Fixed Metal Enclosed High Voltage Switchgear?

Space-Saving: Suits the conditions in case of cramped situations due to smaller dimensions.
Reliability: Attributes such as the rotary isolating switch and mechanical interlocking mechanism provide a very reliable solution for power distribution in high voltage.
Ease of Use: Simple maintenance with straightforward design, for example, clear observation windows and convenient cable access.
Safety: Engineered with high protection ratings and broad safety features to maintain long-term operation in rugged applications.

Conclusion

The XGN66-12(Z) Fixed Metal Enclosed High Voltage Distribution Electrical Switchgear is a rugged, efficient, and compact solution for today’s power distribution. Whether you’re seeking to use it in power stations, substations, or industrial enterprises, the switchgear is a testament to ultimate safety, performance, and reliability.

Installation Guidelines for Switchgear

1. Foundation Preparation
   • Refer to the installation foundation diagram (Fig. 2).
   • Ensure the foundation channel steel protrudes 1–3 mm above the ground.
   • Allowable unevenness: ≤1.5 mm per meter, with total deviation ≤5 mm across the entire length.
2. Switchgear Placement & Fixing
   • Position the switchgear sequentially on the foundation and adjust alignment.
   • Secure the cabinets using M12 bolts or spot welding.
   • Tighten inter-cabinet connections with M8 bolts.
3. Busbar & Primary Cable Installation
   • Remove cover plates to install the main busbar and primary cables.
   • Clean terminal contact surfaces thoroughly and apply neutral Vaseline.
   • Seal all cable holes after installation.
4. Grounding System
   • Connect the grounding busbar between cabinets to form a continuous conductive path.
   • Verify:
     • All grounding points are properly connected.
     • Grounding circuit continuity.
     • Grounding resistance ≤1 Ω (corrected from “1Q”).
5. Secondary Cable Installation
   • Route cables into the cabinet from the front bottom, guiding them along the sidewall into the relay room.
   • Terminate cables on the terminal row and seal cable holes afterward.
6. Final Inspection
   • Remove dust and debris from the cabinet interior.
   • Confirm all components are securely fastened and sealed.

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Notes:

• Maintain cleanliness during installation to avoid contamination.
• Follow torque specifications for bolt tightening.
• Ensure compliance with local electrical codes and safety standards.

Factory documentation

The manufacturer shall provide the following documents and attachments when supplying
Shipping list;
Product qualification certificate and factory test report;
User manual;
Regarding electrical drawings;
Main component manual;
Cabinet door keys, operating handles, and spare parts specified in the contract.