550kV Extra-High Voltage (EHV) Gas-Insulated Switchgear

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1 Set/Sets

Delivery Time:

30 Days

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Product Description

Product Attributes
Product Feature
Product description

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Overview

Product Attributes

Model No.: ZF12-550 / HGIS-550

Brand: HENGFENGYOU

Application: Power distribution

Phase: Single-phase Enclosure

Rated Voltage: 550kV

Rated current: 4000A / 5000A / 6300A

Frequency: 50Hz / 60Hz

Degree of protection: IP67 (Gas Compartment)

Standard: IEC 62271-203

Certificate: CB CCC SABS

Shell Material: Steel

Origin: China

Packaging: Plywood

Delivery Time: 30 Days

Product Feature

Product description

Product Overview
The 550kV Extra-High Voltage (EHV) GIS is the ultimate expression of power engineering and a symbol of national grid strength. Designed as the core component for strategic grid backbones and cross-provincial transmission hubs, this system provides the highest level of energy security. It integrates cutting-edge interruption technology to manage the extreme demands of EHV networks while maintaining an ultra-compact footprint.
Key Features
Advanced Arc-extinguishing Principle: Utilizes a state-of-the-art "Thermal Expansion + Auto-puffer" mechanism. This advanced principle ensures reliable interruption of massive short-circuit currents with minimal operating energy, protecting the strategic grid during critical faults.
Strategic Grid Backbone Reliability: Engineered for 550kV ultra-long-distance transmission, providing a robust and stable node for the most vital segments of the national power infrastructure.
Extreme Mechanical Stability: The high-strength support structures and precision-engineered driving linkages are designed for decades of vibration-free operation, ensuring structural integrity under EHV stresses.
Minimum Maintenance Philosophy: The hermetically sealed SF6 environment and low-wear contact materials result in a Minimum maintenance lifecycle, drastically reducing the total cost of ownership for utility operators.
Industry-Leading Sealing: Guarantees a Gas Leakage Rate of $\le$ 0.1% per year, essential for maintaining dielectric strength in 550kV environments over a 40-year lifespan.
Technical Specification

Parameter	Specification
Rated Voltage	550kV
Rated Current	4000A / 5000A / 6300A
Rated Breaking Current	50kA / 63kA
Annual Gas Leakage Rate	≤0.1%
Partial Discharge Level	≤3pC (Ultra-low noise)

Application Environment
Cross-provincial EHV Hubs: The primary switching center for the intersection of 550kV transmission corridors.
Strategic Energy Bases: Ideal for connecting massive nuclear, hydro, or thermal power complexes to the national grid.
High-Seismic & Extreme Climate Zones: The low center of gravity and aluminum alloy enclosure provide superior protection against earthquakes and harsh weather.
Smart Digital Substations: Fully integrated with fiber-optic sensors for real-time monitoring of gas density, mechanical travel, and internal arcing.
Why Choose Us (HENGFENGYOU ELECTRIC)
Symbol of Engineering Excellence: Our 550kV GIS represents the pinnacle of our R&D, serving as a trusted solution for strategic energy projects worldwide.
Integrated Lifecycle Support: We provide end-to-end services from specialized seismic simulation during the design phase to expert-led on-site commissioning.
Global Quality Standards: Manufactured in precision-controlled cleanrooms to meet and exceed IEC 62271-203 and other international EHV specifications.
FAQ
1. What makes the 550kV arc-extinguishing principle different?
At 550kV, the energy involved in a fault is immense. Our "Auto-puffer" technology uses the heat of the arc itself to assist in quenching, which reduces the physical strain on the operating mechanism and ensures a cleaner, faster break.
2. How does the "Minimum maintenance" design benefit EHV operators?
n EHV substations, downtime is incredibly expensive and risky. Our GIS is designed for long intervals between inspections, with most monitoring done remotely via smart sensors, ensuring the grid stays live longer.
3. Why is the Aluminum Alloy enclosure critical at this voltage level?
Beyond corrosion resistance, at 5000A or 6300A, steel tanks would experience massive heating from eddy currents. Our Aluminum Alloy tanks remain cool and energy-efficient even under full load.
4. Can this unit be transported to remote mountainous sites?
Yes. Despite the 550kV rating, the modular design allows for components to be transported in specialized, shock-absorbed packaging and assembled on-site with high precision.

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