High-voltage switchgear series up to 35kV

Product Overview

High-voltage distribution switchgear is indispensable core equipment in power systems, widely used in power plants, substations, industrial and mining enterprises, high-rise buildings, and infrastructure distribution systems. It is responsible for the reception, distribution, control, and protection of electrical energy, ensuring the safe and stable operation of electrical equipment.

This product series includes the KYN28A armored removable switchgear, HXGN high-voltage ring main unit, and XGN15 fixed ring main switchgear.

These three products are designed for different application scenarios and operational requirements: the KYN28A series focuses on stringent protection and high-parameter requirements for main substations; the HXGN series, with its compact and flexible design, is widely used at ring network nodes in urban distribution grids; the XGN15 series, with its fully insulated and sealed construction, is the ideal choice for underground distribution rooms and harsh environments.

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Normal Service Environment

Ambient Temperature: -5°C ~ +40°C (average temperature within 24 hours shall not exceed +35°C).

Altitude: ≤ 2000 meters.

Relative Humidity:

Shall not exceed 50% at the maximum temperature of +40°C. Higher relative humidity is permitted at lower temperatures (e.g., up to 90% at +20°C). Consideration shall be given to condensation that may occur due to temperature variations.

Installation Environment:

No severe vibration or shock; locations free from electrically corrosive gases that could damage metal or insulation.

The following table provides a detailed comparison across three dimensions: structural features, key technical parameters, and core advantages.

Type

Structural Features

Technical Parameters

Application Scenarios

Core Advantages

KYN28A (Armored Removable AC Metal-enclosed Switchgear, 10kV~35kV)

1. Indoor armored removable type with center-mounted structure, suitable for 35kV and below power systems.

2. Enclosure fabricated from aluminized zinc sheet by CNC bending and riveting, offering high strength and excellent corrosion resistance.

3. Internally divided into four independent compartments: circuit breaker room, busbar room, cable room, and relay & instrument room, with grounded metal partitions.

4. Trolley chassis driven by lead screw, equipped with anti-misoperation mechanical interlock ("Five-Prevention").

- Rated voltage: 12~40.5kV

- Rated current: 1250A~3150A

- Rated short-circuit breaking current: 31.5kA/40kA

- Rated short-time withstand current: 31.5kA/40kA (4s)

- Protection degree: IP4X (enclosure), IP3X (between compartments)

- Dimensions: W 1000/1200 × D 1800 × H 2300 mm

1. 10kV~35kV three-phase AC 50Hz power systems.

2. Power plants and large/medium generator power transmission.

3. Industrial & mining enterprise distribution, urban grid renovation, and 35kV substations.

4. High-rise buildings and large industrial projects (especially where high power supply reliability is required).

1. High Safety: Fully armored structure with independent compartments, effectively isolating arc faults.

2. Easy Maintenance: Center-mounted trolley design provides ample service space and excellent interchangeability.

3. Long Service Life: Aluminized zinc sheet construction resists corrosion; mechanical service life up to 20 years.

HXGN (High-Voltage Ring Main Unit, 10kV~35kV)

1. Indoor metal-enclosed box-type structure, available in fixed type and load switch-fuse combination type.

2. Compact structure with modular design, allowing left/right extension or top/bottom combination.

3. Main switch typically SF6 or vacuum load switch, with spring energy storage operating mechanism (manual/electric).

4. Cabinet doors equipped with observation windows and mechanical interlocks.

- Rated voltage: 12~40.5kV

- Rated current: 630A (main busbar) / 125A (fuse)

- Rated short-circuit making current: 50kA

- Rated short-time withstand current: 20kA (3s)

- Protection degree: IP3X

- Dimensions: W 500~1200 × D 900~1200 × H 1900~2300 mm

1. 10kV~35kV ring network power supply or terminal power supply systems.

2. Key nodes in urban grid "hand-in-hand" ring network power supply.

3. Residential areas, commercial centers, industrial parks, airports, and metro distribution sites.

4. Renewable energy stations (wind/solar PV) for collector line distribution.

1. Compact Size: Small footprint, ideal for space-constrained distribution rooms or box-type substations.

2. Flexible Configuration: Modular assembly enables rapid combination of various ring network schemes.

3. Cost-Effective: Simplified structure with lower cost, suitable for large-scale distribution network construction.

XGN15 (Fixed AC Metal-enclosed Ring Main Switchgear, 10kV~35kV)

1. Indoor fixed type; main switch adopts SF6 load switch (vacuum circuit breaker optional).

2. Enclosure welded from high-quality cold-rolled steel plate, offering high strength and excellent sealing.

3. Three-position disconnect switch (close, open, ground) with reliable mechanical interlock.

4. Busbar system arranged top/bottom or left/right, with flexible incoming/outgoing lines (cable/overhead).

- Rated voltage: 12~40.5kV

- Rated current: 1250A~2000A

- Rated short-circuit making current: 50kA

- Rated short-time withstand current: 20kA (3s)

- SF6 gas rated pressure: 0.04 MPa (20°C, gauge pressure)

- Protection degree: IP3X

- Dimensions: W 500~1200 × D 900~1200 × H 1900~2300 mm

1. 10kV~35kV ring network, terminal, and radial power supply systems.

2. Sites with high requirements for fire prevention, explosion protection, and moisture resistance.

3. Underground distribution rooms, high-rise building basements, tunnels, and coastal high-salt-spray areas.

4. Harsh industrial environments such as mining and metallurgy.

1. Fully Insulated & Sealed: SF6 gas chamber is fully sealed, maintenance-free, and unaffected by the environment.

2. High Reliability: Fixed structure with no trolley mechanism, minimizing mechanical failure points.

3. Excellent Environmental Adaptability: Effectively resists condensation, pollution, and small animal intrusion.

Product Specifications Details