550kV Aluminum free ring basin insulator
Key attributes
| Brand | Switchgear parts |
| Model NO. | 550kV Aluminum free ring basin insulator |
| Rated voltage | 550kV |
| Series | RN |
Product descriptions from the supplier
The 550kV aluminum free ring pot insulator is a key insulation component in high-voltage GIS equipment, and its design achieves miniaturization and environmental protection through structural optimization and material innovation. The following is a comprehensive technical analysis:
Core design features
Geometry optimization
Adopting a contour design of "thick on both sides and thin in the middle", the maximum electric field strength along the concave surface is reduced by 25.4%, and the deformation is reduced by 29.9%
Optimize thickness variables (H ₁, H ₂, etc.) and contour variables (C ₁ ₂, C ₁ ∝, etc.) through genetic algorithm to balance electrical and mechanical performance
Advantages of aluminum free ring structure
Cancel traditional metal shielding rings to avoid local electric field distortion and simplify manufacturing processes
Reduce SF6 gas usage by 15% and epoxy composite material usage by 6.1%
2、 Application of dielectric gradient materials
3D printing+casting process
Using aluminum oxide/photosensitive resin 3D printing low dielectric constant body (ε=3.98-4.20), titanium dioxide/epoxy resin casting high dielectric constant region (ε=11.32-14.58)
The electric field distortion near the grounding flange has been significantly improved, and the flashover voltage has increased by 13.8%
Electric field regulation effect
After optimization, a high dielectric constant region is formed on one side of the convex surface near the outer flange of the insulator, greatly alleviating the phenomenon of electric field concentration
3、 Performance parameters and validation
Electrical performance
Power frequency withstand voltage 230kV, lightning impulse withstand voltage 550kV, local discharge capacity ≤ 5pC
When metal foreign objects are present, the flashover voltage can still be increased by 6.7%
Mechanical strength
The maximum deformation is reduced to 0.45mm, and the interface stress is below 70MPa
Verify reliability through hydraulic failure test (1.5 times rated pressure)
4、 Application and Environmental Benefits
Typical scenario
Suitable for 550kV GIS equipment, such as ultra-high voltage transmission projects or high-altitude environments
Can replace the traditional "R-arc" metal shielding structure and simplify the miniaturization transformation of GIS
Environmental Contribution
Reduce SF6 gas usage by 15%, in line with environmental trends
5、 Patent and tooling technology
Pressure resistant tooling design: adopting a transition tank body and conductive spring structure, supporting synchronous detection of multiple bowl insulators
Embedded optimization: The cylindrical conductive electrode is designed with arc-shaped protrusions to improve sealing and electric field uniformity
Related Products
Related Knowledges
-
On-Line Testing for Surge Arresters Below 110kV: Safe and EfficientAn On-Line Testing Method for Surge Arresters at 110kV and BelowIn power systems, surge arresters are critical components that protect equipment from lightning overvoltage. For installations at 110kV and below—such as 35kV or 10kV substations—an on-line testing method effectively avoids the economic losses associated with power outages. The core of this method lies in using online monitoring technology to evaluate arrester performance without interrupting system operation.The test principle is bOliver Watts10/23/2025 -
Why Upgrade to Maintenance-Free Transformer Breathers?Maintenance-Free Moisture Absorption Technology for Oil-Immersed TransformersIn traditional oil-filled transformers, the temperature control system causes thermal expansion and contraction of insulating oil, requiring the sealing gel chamber to absorb significant moisture from the air above the oil surface. The frequency of manual silica gel replacement during patrols directly impacts equipment safety—delayed replacement can easily lead to oil degradation. Maintenance-free moisture absorbers revFelix Spark10/23/2025 -
What Is an MVDC Transformer? Key Applications & Benefits ExplainedMedium-voltage DC (MVDC) transformers have a wide range of applications in modern industry and power systems. The following are some key application areas for MVDC transformers: Power Systems: MVDC transformers are commonly used in high-voltage direct current (HVDC) transmission systems to convert high-voltage AC into medium-voltage DC, enabling efficient long-distance power transmission. They also contribute to grid stability control and power quality improvement. Industrial Applications: In inEdwiin10/23/2025 -
What Is MVDC Technology? Benefits, Challenges & Future TrendsMedium-voltage direct current (MVDC) technology is a key innovation in power transmission, designed to overcome limitations of traditional AC systems in specific applications. By transmitting electrical energy via DC at voltages typically ranging from 1.5 kV to 50 kV, it combines the long-distance transmission advantages of high-voltage DC with the flexibility of low-voltage DC distribution. Against the backdrop of large-scale renewable integration and new power system development, MVDC is emergEcho10/23/2025 -
Why Does MVDC Grounding Cause System Faults?Analysis and Handling of DC System Grounding Faults in SubstationsWhen a DC system grounding fault occurs, it can be classified as single-point grounding, multi-point grounding, loop grounding, or reduced insulation. Single-point grounding is further divided into positive-pole and negative-pole grounding. Positive-pole grounding may cause misoperation of protection and automatic devices, while negative-pole grounding may lead to failure to operate (e.g., relay protection or tripping devices). OnFelix Spark10/23/2025 -
Why Can't VT Be Shorted & CT Be Opened? ExplainedWe all know that a voltage transformer (VT) must never operate short-circuited, while a current transformer (CT) must never operate open-circuited. Short-circuiting a VT or opening the circuit of a CT will damage the transformer or create hazardous conditions.From a theoretical standpoint, both VTs and CTs are transformers; the difference lies in the parameters they are designed to measure. So why, despite being fundamentally the same type of device, is one prohibited from short-circuit operatioEcho10/22/2025
