产品概述
TG3-35Q/260×260×450 墙壁套管 这是一种用于35千伏高压电力系统的环氧树脂绝缘部件。
It allows live conductors, such as busbars and copper bars, to pass safely through walls, partitions, switchgear panels, and other grounded structures. The bushing provides electrical insulation, mechanical support, and a stable passage for conductor connections, helping ensure the safe and reliable operation of high-voltage power systems.
适用于发电厂、变电站、高压 switchgear配电室及其他中压电气装置。
技术规格
| 参数 | 规格 |
|---|---|
| 产品型号 | TG3-35Q/260×260×450 |
| 额定电压 | 40.5 kV, suitable for 35 kV systems |
| 额定频率 | 15–60 Hz |
| 额定电流 | 630–3150 A, customizable upon request |
| 总体尺寸 | 260 × 260 × 450 mm |
| Mounting Flange Size | 260 × 260 mm |
| 材料 | Epoxy resin manufactured by APG process |
| Colour | Red |
| 工频耐压 | 95 kV for 1 minute under dry conditions |
| 雷电冲击耐受电压 | 185 kV peak |
| 局部放电 | ≤5 pC at 1.1 Um |
| 爬电距离 | Complies with the applicable requirements of GB/T 311 and related standards |
| Optional Configuration | Integrated internal shielding layer |
产品特点
Excellent Electrical Insulation
The wall bushing is manufactured through an integrated epoxy resin Automatic Pressure Gelation process. The dense moulded structure helps minimize internal bubbles, voids, and other insulation defects.
Its high dielectric strength provides reliable resistance to electrical breakdown in 35 kV power systems.
The external shed structure increases the creepage distance and improves resistance to surface tracking, moisture, contamination, and flashover.
可靠的机械强度
The epoxy resin body provides good resistance to impact, bending, cracking, and mechanical deformation.
It can withstand the electrodynamic forces generated by busbars during short-circuit conditions, helping maintain conductor alignment and structural stability during long-term operation.
The square mounting flange distributes mechanical loads evenly and provides a firm connection to switchgear panels, walls, or equipment partitions.
Optimized Electric Field Distribution
An internal shielding layer can be integrated according to application requirements. The shielding structure helps distribute the electric field more evenly, reduce local electric field concentration, and suppress partial discharge.
The smooth internal and external surfaces contain no sharp edges, helping reduce corona discharge and improve long-term insulation reliability.
强大的环境适应性
The epoxy resin material provides resistance to:
- High and low temperatures
- Electrical ageing
- Moisture
- Chemical corrosion
- Mould and fungal growth
- Insects and other biological influences
- Common industrial contaminants
The product can be used in indoor, outdoor, high-altitude, and industrial power distribution environments, subject to the selected creepage distance and installation configuration.
安装维护方便
The standardized flange dimensions and mounting-hole arrangement allow the bushing to be installed in compatible 35 kV switchgear, including KYN61-40.5 and similar cabinet structures.
Its compact and lightweight design simplifies installation. Under normal operating conditions, routine maintenance is limited mainly to surface cleaning and connection inspection.
应用
The TG3-35Q/260×260×450 Wall Bushing is suitable for three-phase AC power systems with rated voltages from 10 to 35 kV and frequencies from 15 to 60 Hz.
典型应用包括：
- Busbar passage connections inside high-voltage switchgear
- KYN61-40.5 and similar 35 kV switchgear
- Busbar connections through substation walls and partitions
- Power distribution room wall penetrations
- Box-type substations
- 环网柜
- Busbar and conductor insulation support
- Industrial high-voltage distribution systems
- Mining power distribution systems
- Petrochemical electrical installations
- Power stations and substations
The bushing can be used wherever a live conductor must pass through a grounded wall, metal panel, equipment partition, or insulating barrier.
操作条件
Normal Environmental Conditions
| Condition | Requirement |
|---|---|
| 环境温度 | -40°C 至 +120°C |
| Short-Term Temperature Resistance | Up to +155°C |
| Installation Altitude | ≤3,000 m |
| Daily Average Relative Humidity | ≤95% |
| Monthly Average Relative Humidity | ≤90% |
| Pollution Level | Up to Level IV |
| 安装环境 | Free from severe vibration, impact, explosive substances, and strongly corrosive gases |
For installations above 3,000 metres, equipment derating, insulation coordination adjustment, or a customized bushing may be required.
For heavily polluted environments, a model with an increased creepage distance should be selected.
安装要求
Installation Direction
The wall bushing can be installed vertically or horizontally.
The flange surface must fit closely against the switchgear panel, wall, or mounting partition. All fastening points should be tightened evenly to avoid mechanical stress and deformation.
Conductor Installation
When inserting a copper bar or busbar through the bushing, maintain an even clearance between the conductor and the inner surface.
The conductor must be correctly centred to prevent localized mechanical stress and uneven electric field distribution.
Do not force an oversized or misaligned conductor through the bushing.
Sealing and Protection
Install a suitable sealing gasket between the flange and the mounting surface.
The seal helps prevent dust, moisture, and contaminants from entering the equipment compartment and improves long-term insulation reliability.
电气间隙
After installation, verify the clearance between live conductors and grounded structures.
The completed assembly must meet the minimum electrical clearance and insulation coordination requirements specified in GB/T 311 and other applicable standards.
Fastening Requirements
Use suitable mounting bolts and tighten them according to the equipment assembly specifications.
Excessive tightening may damage the epoxy resin flange, while insufficient tightening may result in vibration, loosening, or uneven mechanical loading.
Inspection and Maintenance
安装前检查
Before installation, confirm that:
- The model and dimensions match the equipment design
- The flange dimensions and mounting holes are compatible
- The surface is clean and dry
- No cracks, chips, deformation, or impact damage are present
- The internal passage is free from foreign objects
- Required electrical inspection results are acceptable
- The conductor size matches the internal opening
Do not install a bushing with visible damage or suspected insulation defects.
Routine Inspection
During scheduled equipment maintenance:
- Clean contamination from the insulating surface
- Check the flange mounting bolts for looseness
- Inspect the surface for cracks or deformation
- Check for electrical tracking marks
- Check for carbonization or arc damage
- Inspect for abnormal partial discharge
- Confirm that the conductor remains correctly positioned
- Check the condition of the flange sealing gasket
Use a clean, dry, soft cloth for routine cleaning. Do not use corrosive solvents, metal tools, or abrasive cleaning materials.
Replacement Conditions
Stop operation and inspect or replace the wall bushing immediately if any of the following conditions are found:
- Visible cracks
- Severe surface damage
- Carbonization
- Electrical tracking
- Arc erosion
- Abnormal partial discharge
- Mechanical deformation
- Loose or damaged conductor connections
- Significant deterioration of insulation performance
安全注意事项
- Avoid impact, dropping, compression, and improper stacking during transportation.
- Store the product in a dry, ventilated environment free from corrosive gases.
- Protect the insulating surface from moisture, oil, dust, and mechanical damage.
- Do not drill, cut, grind, or otherwise modify the bushing without technical approval.
- Do not install or remove the product while the equipment is energized.
- Disconnect and isolate all power sources before installation or maintenance.
- Confirm that the circuit is de-energized and properly grounded before work begins.
- Installation and maintenance must be carried out by qualified electrical personnel.
- Stop operation immediately if partial discharge, tracking marks, cracks, or other insulation abnormalities are detected.
Selection and Ordering Information
When selecting the TG3-35Q/260×260×450 Wall Bushing, confirm the following information:
- System rated voltage
- 额定电流
- Conductor or busbar dimensions
- Installation direction
- Mounting flange dimensions
- Available installation space
- Required creepage distance
- Environmental pollution level
- Installation altitude
- Need for an internal shielding layer
- Indoor or outdoor operating conditions
Customized rated current, conductor openings, creepage distances, shielding structures, and mounting dimensions are available according to project requirements.
