Overview
Our 35kV High Voltage SIS represents the pinnacle of specialized electrical engineering. Designed to replace traditional gas-insulated systems,
this equipment offers a modular architecture that excels in harsh environments. As a maintenance-free solution, the system incorporates a
visible isolation break and integrated earthing to ensure absolute operator safety during routine inspections. By selecting this technology,
utilities and industrial plants secure a robust power distribution framework that aligns with global carbon-reduction mandates while maintaining
superior dielectric strength. The unit’s air-tight construction effectively prevents internal oxidation and moisture ingress, ensuring a 30-year
operational life without the environmental risks or regulatory burdens associated with greenhouse gas emissions found in older technologies.
Core Components and Features
The internal architecture of this Solid Insulated Vacuum Switchgear centers on high-grade vacuum interrupters embedded in solid dielectric
materials. Every panel includes a three-position switch—Closing, Isolating, and Earthing—to eliminate operational errors. The system utilizes
high-conductivity copper busbars and specialized silicone rubber connectors to maintain a fully insulated, touch-safe exterior.As a Compact Solid
Insulated Switchgear, it integrates intelligent microcomputer protection units providing real-time monitoring and remote control. The cabinet
is equipped with precise voltage sensors and live display indicators, ensuring functionality remains stable under extreme humidity or heavy dust.
Each module allows for easy lateral expansion, enabling the grid to scale alongside rising power demands without requiring extensive site
modifications or specialized gas handling equipment.
Design and Compliance
Design:
This Custom 35kV Electrical Switchgear follows a strictly modular design philosophy. This allows the system to be configured for various circuit
requirements, including cable entry, metering, and bus-sectionalizing. The frame is constructed from high-strength Al-Zn coated steel, providing
excellent corrosion resistance. Each unit can be tailored with specific secondary control logic to meet unique site requirements, ensuring the
equipment fits perfectly into existing substation layouts without complex re-engineering.
Compliance:
The equipment is fully compliant with IEC 62271-200 standards for medium-voltage switchgear. The core modules undergo rigorous type testing,
including lightning impulse withstand and partial discharge tests. By eliminating SF6, this High Voltage Solid Insulated Cabinet avoids the regulatory
burdens associated with greenhouse gas reporting, making it a future-proof investment for global energy markets.
Key Advantages
Environmental Sustainability
Unlike traditional gear, this system is 100% SF6-free. By using solid dielectrics, it eliminates the risk of toxic gas leakage and simplifies
end-of-life recycling, serving as a truly ecological power solution.
Superior Environmental Adaptability
The fully encapsulated design protects internal components from salt spray, moisture, and chemical contaminants. This makes the Indoor
35kV Solid Insulated Switchgear particularly effective in coastal regions, high-altitude mines, and humid tunnels.
Enhanced Operational Safety
Safety is paramount in the 35kV SIS Ring Main Unit. With all live parts shielded, the design prevents internal arcing and accidental contact.
The system also features mechanical interlocks and transparent viewing ports to verify switch positions at a glance.
Compact Footprint and Low TCO
The modular layout reduces floor space requirements by up to 40% compared to air-insulated alternatives. This lowers civil engineering costs,
while the maintenance-free nature of the gear significantly reduces the total cost of ownership.
Parameter
Rated Voltage |
35kV / 40.5kV |
Rated Current |
630A / 1250A |
Rated Frequency |
50Hz / 60Hz |
Customization |
Available |
Short-time Withstand Current |
20kA / 25kA (4s) |
Peak Withstand Current |
50kA / 63kA |
Lightning Impulse Withstand Voltage |
185kV |
Application Scenarios
Renewable Energy Integration
The system is widely deployed in wind farm towers and solar PV substations. Its compact design allows it to be installed inside narrow turbine
bases or mobile containerized substations. It reliably handles the frequent switching cycles common in renewable energy generation, providing
stable power for green grids.
Urban Infrastructure and Transportation
In crowded metropolitan areas, this technology is the preferred choice for subway traction power and high-rise commercial complexes. Its small
size allows it to be placed in basement electrical rooms where space is at a premium. The vacuum-based interruption ensures silent, reliable
operation without explosion risks in public areas.
Industrial and Mining Operations
For heavy industries such as steel mills and underground mining, the equipment provides unmatched durability. The High Voltage Solid Insulated
Cabinet is impervious to conductive dust and corrosive gases. Whether used for motor control or site distribution, it maintains high uptime in the
most demanding industrial settings.
Smart Grid and Utility Distribution
Utilities utilize these systems to modernize aging distribution networks. The 35kV SIS Ring Main Unit integrates seamlessly with SCADA systems,
enabling automated fault detection and isolation. This facilitates the transition to intelligent, self-healing grids across diverse geographical regions,
including high-altitude and coastal zones.
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