220kV Dry Plug GIS GIS Terminal
The 220kV Dry Plug GIS terminal plays a crucial role in the high - voltage power transmission and distribution field. It's suitable for the 220kV voltage level. The dry - type insulation has significant advantages. It's oil - free, avoiding the risk of leakage, and is environmentally - friendly, fire - proof and flame - retardant. The plug - in design is flexible and convenient, facilitating rapid installation, maintenance and replacement, and saving the time and cost of operation and maintenance.
- Product Introduction
The 220kV Dry Plug GIS terminal plays a critical role in the high - voltage power transmission and distribution field. It's suitable for the 220kV voltage level. The dry - type insulation has many advantages. It's oil - free, avoiding the risk of leakage, and is environmentally - friendly,Flame retardant.
The plug - in design is flexible and convenient, facilitating rapid installation, maintenance and replacement, and saving the time and cost of operation and maintenance. The fine internal structure ensures the accurate and stable connection between the cable and GIS equipment for efficient power transmission and can withstand severe electrical and mechanical environmental tests. It's widely used in large - scale substations and urban power grid hubs and effectively safeguards the stable supply of electricity.
Model Meaning
Technical parameters
| Item | Parameter |
|---|---|
| Rated Voltage and Frequency | 120/220 kV, 50 Hz |
| Maximum Operating Voltage | 252 kV |
| Ambient Temperature Range | -40℃ to +40℃ |
| Maximum Conductor Temperature (Normal Operation) | 90℃ |
| Maximum Conductor Temperature (Short Circuit) | 250℃ |
| 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 (254 kV, 95-100℃, 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℃,10 times each) | No breakdown or flashover |
| Power Frequency Voltage Test (160 kV, 15 min) | No breakdown or flashover |
|
Sealing Test for Assembled Terminations a. Pressure Leakage Test (250±10 MPa, 1 h) b. Vacuum Leakage Increase Test (1 h) – Pressure Increment (B–A) |
No gas leakage 60pa |
Characteristics:
● Dry-Type Terminal Design
The 220kV Short type Dry Plug GIS terminal completely oil-free structure eliminates insulation oil, overcoming aging issues caused by oil-immersed stress cones. This design not only extends the stress cone's service life but also prevents leakage during operation, ensuring environmentally friendly and maintenance-free performance.
● Combined Spring Compression System
The innovative spring-loaded mechanism maintains constant interfacial pressure between the stress cone and epoxy bushing inner wall. This compensates for material aging-induced relaxation, guaranteeing long-term operational reliability.
● Compact and Lightweight Construction
Features reduced weight and minimized dimensions with optimized layout, significantly improving installation and maintenance accessibility.
● Pre-fabricated Insulation System
Factory-preassembled insulation components include:
Epoxy bushings with integrated high-voltage shielding electrodes
Imported high-elasticity liquid silicone rubber stress cones
Structurally optimized stress cone design
● Rigorous Quality Control
All core insulation components undergo standardized factory testing in compliance with industry specifications.
Products size:
220kV Short type Dry Plug GIS terminal
220kV Short type Dry Plug GIS terminal
Certificate:
New patent certificate/Design patent certificate, business license, expert workstation, production license, high-tech enterprise certificate, CE certificate, CCC certificate, SGS certificate, quality inspection report,and ISO9001,ISO14001,OHS18001, and other certifications.
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