产品概述
TG3-35Q/180×180×550 3AV3 墙式绝缘子 环氧树脂浇注的户内高压隔离开关套管，适用于35千伏和40.5千伏可抽出式 switchgear开关柜及其他成套电气设备。
It is mainly used where live conductors pass through grounded partitions, equipment enclosures, or walls. The bushing provides insulating support, electric field shielding, and an electrical connection transition, helping ensure the safe and stable operation of high-voltage power systems.
技术规格
| 参数 | 规格 |
|---|---|
| 额定电压 | 40.5 kV, suitable for 35 kV systems |
| 额定频率 | 50/60 赫兹 |
| 安装尺寸 | 180 × 180 mm flange opening |
| 总高度 | 550毫米 |
| 材料 | Epoxy resin with a glass transition temperature of ≥105°C |
| 爬电距离 | ≥810毫米 |
| 工频耐压 | 95 kV for 1 minute |
| 雷电冲击耐受电压 | 185–200 kV peak |
| 局部放电 | ≤3 pC at a test voltage of 4.5 kV |
| 额定电流范围 | 1,250–2,500 A, customizable |
| Structural Design | One-piece epoxy resin casting with an integrated shielding layer |
产品特点
Excellent Insulation Performance
The bushing is manufactured using an integrated epoxy resin vacuum-casting process. A metal shielding layer is embedded inside the structure to distribute the electric field evenly, suppress partial discharge, and improve resistance to contamination and moisture.
Compact and Reliable Structure
The central flange mounting structure and upper and lower shed-type external insulation sections provide sufficient creepage distance while fitting the limited internal space of withdrawable switchgear.
The product offers high mechanical strength and reliable resistance to vibration and impact.
免维护设计
The insulating surface provides good hydrophobicity and ageing resistance. No regular application of anti-pollution coatings is required. Routine surface cleaning is normally sufficient to maintain reliable insulation performance and reduce maintenance costs.
Wide Compatibility
The product is compatible with 3AV3 standard switchgear configurations. Different rated currents and mounting dimensions can be customized to meet the requirements of various indoor high-voltage electrical assemblies.
Safe and Environmentally Friendly
The product contains no insulating oil or SF₆ gas, eliminating the associated risks of leakage and explosion. It is suitable for environmentally responsible high-voltage electrical equipment.
应用
- Suitable for indoor AC high-voltage distribution systems with a rated voltage of 35 kV or 40.5 kV and a frequency of 50/60 Hz.
- Mainly used in withdrawable switchgear, high-voltage switchgear, ring main units, box-type substations, and other complete electrical equipment.
- Used as an insulating and connecting component where busbars or cables pass through equipment enclosures or grounded partitions.
- Suitable for indoor high-voltage locations such as power stations, substations, and distribution rooms in industrial facilities.
- Provides insulation, separation, support, and secure connection between live conductors and grounded structures.
操作条件
Normal Operating Environment
- Ambient temperature: -5°C to +40°C. Customized versions are available for special environments.
- Relative humidity: ≤85% at an ambient temperature of 20°C.
- Installation altitude: ≤1,000 m. For installations above 1,000 m, derating or a customized high-altitude version is required.
- Installation location: indoor.
- The installation environment should be free from severe vibration, flammable or explosive substances, corrosive gases, heavy dust, and conductive dust.
Extreme Operating Conditions
- Minimum ambient temperature: -25°C. A cold-resistant epoxy resin formulation is required.
- Maximum ambient temperature: +50°C. Derating is required to avoid accelerated insulation ageing.
- Maximum installation altitude: 3,000 m. A reinforced high-altitude version is required.
Prohibited Operating Environments
- Locations containing corrosive gases, vapours, dust, or explosive mixtures.
- Outdoor environments involving prolonged water immersion, heavy salt spray, or strong ultraviolet exposure.
- Areas with a seismic intensity above Level 8 unless additional mounting reinforcement is provided.
安装与维护注意事项
- During installation, ensure that the busbar or cable passes through the centre opening of the bushing. The conductor must not scrape against or press on the inner wall.
- Tighten the flange bolts evenly to prevent uneven mechanical stress, which may cause cracking or sealing failure.
- Inspect and clean the insulating surface regularly. Remove accumulated dust and oil to prevent a reduction in the effective creepage distance.
- If surface cracks, discharge marks, or abnormal temperature rise are detected during operation, stop the equipment immediately and carry out an inspection and repair.
