40.5kV Composite Apparatus for Wind & Solar Power Systems

Compact, Reliable Indoor Vacuum Breaker Solution for Clean Energy Infrastructure

As renewable energy grows rapidly worldwide, solar and wind power stations are facing new demands for compact, reliable, and maintenance-friendly switchgear systems. The 40.5kV Composite Apparatus from Wei Shoe Electric offers an integrated indoor vacuum breaker solution specifically engineered for wind farms and solar substations, where space is limited and uptime is critical. Unlike traditional VCB units, this composite apparatus combines a disconnector, a circuit breaker, and current transformer (CT) into one pre-tested unit, saving installation time and operational cost.

🔧 What Is a Composite Apparatus?

A composite apparatus integrates multiple switching and sensing components into one encapsulated structure. In our 40.5kV model, the following parts are factory-assembled and pre-aligned:

• Vacuum circuit breaker (VCB)

• Three-position disconnector

• Current transformer (CT)

• Interlocking mechanical drive

• Epoxy-insulated composite housing

This design eliminates field assembly errors and significantly shortens commissioning time.

✅ Key Features

• Rated voltage: 40.5kV / 50Hz

• Rated current: up to 1250A

• Breaking capacity: 25kA

• Insulation: SF6-free, fully epoxy resin cast

• Standard compliance: IEC 62271-100 / 200, GB 1984-2014

• Custom CT ratio & disconnector option available

🌱 Designed for Renewable Energy Environments

• Compact size fits in skid-mounted and modular container substations

• High mechanical endurance for vibration-prone environments (like wind turbines)

• Dustproof and moisture-resistant structure ideal for remote solar installations

• Zero gas leakage and low maintenance: ideal for unmanned operation zones

🔍 Application Case: 40MW Wind Substation in Inner Mongolia (2024)

In 2024, Wei Shoe Electric supplied 18 sets of this 40.5kV composite apparatus to a wind substation project in Inner Mongolia, China. The customer required:

• Indoor solution for a containerized control room

• Minimal commissioning time

• Withstand −35°C operating temperatures

After 6 months of operation, feedback confirmed 100% uptime, zero leakage, and excellent insulation performance under severe temperature swings.

📊 Technical Parameters

❓ Frequently Asked Questions

• Can this apparatus be used in offshore wind farms?
Yes. Its fully enclosed structure ensures resistance to salt spray, moisture, and vibration.

• How does it compare to traditional AIS systems?
This unit reduces installation time by over 40% and eliminates on-site CT/disconnector wiring.

• Is it suitable for solar PV switching stations?
Absolutely. It's designed for compact PV control rooms with minimal maintenance needs.

• Does it meet IEC standards?
Yes, it complies with IEC 62271-100 and 62271-200, and has passed full type testing.

• Can we customize CT ratios or disconnector layout?
Yes, our engineers can provide custom CT and mechanical options for your project.

👷 About the Engineer

I'm Thor, an electrical engineer at Wei Shoe Electric, focusing on medium voltage switchgear solutions for over 12 years. My work includes customized circuit breaker designs for renewable energy, smart grids, and industrial substations. Feel free to reach out for technical drawings, tender assistance, or optimized substation layouts.

📞 Tel: +86-0577-62788197
📱 WhatsApp: +86 159 5777 0984
📧 Email: thor@weishoelec.com

📩 Ready to Power Your Project?

Whether you're designing a new wind farm or upgrading solar substations, this composite apparatus offers compactness, safety, and cost-efficiency in one robust unit. Contact us today for CAD drawings, datasheets, or pricing tailored to your region.