220kV Composite Outdoor Termination
✅Premium Composite Insulation
✅Extreme Environmental Resilience
✅Optimized Mechanical Strength
✅Compact, Lightweight Design
✅Virtually Maintenance-Free Operation
- Product Introduction
The 220kV composite outdoor termination is a critical, high-voltage component engineered to provide a seamless, high-insulation interface between high-voltage overhead transmission lines, underground XLPE power cables, and substation busbar systems.
Model Meaning
Technical Parameters
| Technical parameters of 220kV Composite Outdoor Termination | |
| Item | Parameter |
| Rated Voltage and Frequency | 120/220 kV, 50 Hz |
| Maximum Operating Voltage | 252 kV |
| Ambient Temperature Range | -40 °C to +40 °C |
| Maximum Conductor Temperature (Normal Operation) | 90 °C |
| Maximum Conductor Temperature (Short Circuit) | 250 °C |
| Applicable Cable Cross-Section | 240-2500 mm² |
| Maximum Altitude | ≤1000 m (Custom designs available for >1000 m) |
| Pollution Level | Suitable for heavily polluted areas (Class IV) and coastal high salt-fog regions |
| Partial Discharge Test (Ambient, 190 kV) | No detectable discharge at ≤5 pC sensitivity |
| Thermal Cycling Test (252 kV, 95-100 °C, 8h heating/16h cooling) | Completed 20 cycles |
| Partial Discharge Test (High Temp, 190 kV) | No detectable discharge at ≤5 pC sensitivity |
| Impulse Voltage Test (±1050 kV, 95-100 °C, 10 times each) | No breakdown or flashover |
| Power Frequency Voltage Test (395 kV, 15 min) | No breakdown or flashover |
Sealing Test for Assembled Terminations a. Pressure Leakage Test (250±10 kPa, 1 h) b. Vacuum Leakage Increase Test (1 h) | No gas leakage Pressure Increment (B-A) ≤60 Pa |
Key Features
Premium Composite Insulation: Utilizing advanced silicone rubber composite housings (composite bushings) rather than traditional porcelain, the termination delivers superior hydrophobic performance, exceptional anti-tracking properties, and unmatched resistance to environmental degradation.
Extreme Environmental Resilience: Engineered to withstand severe pollution, high UV exposure, coastal salt spray, and seismic activity, the composite shell effectively prevents wet flashovers and minimizes the risk of catastrophic brittle fractures.
Optimized Mechanical Strength: The high-strength fiberglass-reinforced matrix core provides excellent structural rigidity, easily managing cantilever loads and cable tension under extreme weather and wind conditions.
Compact, Lightweight Design: The lightweight nature of composite materials dramatically reduces structural loads on termination towers or gantry structures, simplifying logistics, reducing installation footprints, and accelerating commissioning timelines.
Virtually Maintenance-Free Operation: Excellent self-cleaning characteristics substantially mitigate dust and pollution accumulation, eliminating the need for periodic manual washing and driving down long-term operational expenditures (OPEX).
Product Dimension
Application
The 220kV composite outdoor termination is a critical asset deployed across high-voltage transmission networks and utility substations to ensure reliable grid connectivity. Its main applications and field performance advantages include:
Application
1. High-Voltage Transmission Line & Grid Interconnection
Application: Serves as the vital interface linking high-voltage underground XLPE cables to overhead transmission lines (gantry structures) and substation busbars.
Performance: Facilitates continuous, high-capacity electrical energy transfer while maintaining insulation integrity at critical transition points.
2. Extreme Environmental & Weather Adaptability
Application: Ideal for installation in heavily polluted industrial zones, high-salt coastal environments, and severe weather climates.
Performance: Seamlessly operates across a broad temperature matrix (from extreme sub-zero to high ambient heat) with high humidity resilience. The hydrophobic nature of the silicone rubber composite prevents water pooling and pollution flashovers.
3. Substation Space Optimization
Application: Deployed in compact municipal substations, dense urban gantry towers, and space-constrained industrial sub-stations.
Performance: Featuring a highly optimized structural envelope, its compact profile offers a significantly smaller footprint compared to traditional porcelain insulators, allowing for flexible, high-density installation layouts.
4. Asset Lifecycle Cost Reduction (OPEX Minimization)
Application: Used by grid operators seeking to minimize manual maintenance overhead in remote or high-pollution sectors.
Performance: The high corrosion resistance and self-cleaning attributes of advanced composite materials minimize structural degradation and eliminate the need for periodic manual washing, substantially lowering long-term maintenance costs.
5. Advanced Grid Safety & Reliability
Application: Critical for networks prone to seismic activity, grid overvoltages, or heavy external contamination.
Performance: Delivers exceptional dielectric strength and high anti-tracking properties, effectively suppressing surface arcing, tracking, and short circuits. Furthermore, the explosion-proof nature of composite housings prevents shattering, enhancing safety for nearby personnel and substation equipment.
FAQ
FAQ
We provide full-lifecycle technical support across three distinct phases:
Pre-Sale: Technical consultation, grid configuration matching, and custom blueprinting.
In-Sale: Production tracking, quality updates, and strict inspection oversight.
After-Sale: A responsive, highly patient engineering team dedicated to troubleshooting your field inquiries and delivering timely technical solutions.
Our standard commercial payment term is Telegraphic Transfer (T/T):
30% Advance Payment: Required to initiate production and secure raw materials.
70% Balance Payment: Settled prior to shipment. Before processing the balance, we will send you comprehensive production completion records and photographs of the finished goods for your verification.
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