The 220kV Disconnect Switch is a high-voltage outdoor isolation device designed for 220kV AC power transmission substations. It is mainly used to isolate electrical circuits, provide a visible safety disconnect point, and ensure safe maintenance operations for high-voltage equipment.
As a professional high voltage substation equipment manufacturer in China, we provide reliable 220kV Disconnect Switch solutions featuring stable electrical performance, strong outdoor adaptability, and compliance with international standards. The product is designed according to IEC 62271-102 requirements and is widely applied in power transmission and distribution systems.
During normal operation, the 220kV Disconnect Switch carries rated current continuously. When maintenance is required, it creates a clear visible isolation gap after opening, allowing operators to safely inspect and repair downstream electrical equipment.
The disconnect switch is designed for no-load current switching operations and works together with circuit breakers and earthing switches to improve substation operation safety.
The complete 220kV Disconnector consists of a three-phase main structure, supporting insulators, conductive system, steel base frame, and motor-driven operating mechanism. Each component is optimized for long-term outdoor operation under high-voltage conditions.
The conductive contacts are manufactured using high-density silver-plated copper alloy materials. This design effectively reduces contact resistance, minimizes temperature rise during continuous operation, and improves electrical conductivity and service reliability.
The supporting insulators are manufactured with high-grade alumina porcelain or optional composite silicone rubber materials. The insulation structure provides excellent electrical strength and environmental resistance, ensuring stable operation in outdoor substations.
The base frame adopts a hot-dip galvanized steel structure with strong corrosion resistance. It is suitable for long-term outdoor installation and helps maintain mechanical strength under different weather conditions.
The 220kV Outdoor Disconnect Switch is equipped with a motor-driven operating mechanism, while manual emergency operation is also available. The mechanism box is designed with an IP54 protection rating to improve protection against dust and water ingress.
The operating mechanism includes auxiliary contacts that provide position feedback signals for remote monitoring systems. This allows operators to check switch status efficiently in modern substations.
The disconnect switch can be integrated with circuit breakers and earthing switches to prevent incorrect operations. The safety interlocking system ensures that:
| Product Type | Outdoor High Voltage Disconnect Switch |
| Rated Voltage | 252kV |
| Rated Frequency | 50Hz |
| Rated Continuous Current | 1250A / 2000A / 2500A |
| Short-Time Withstand Current (3s) | 40kA / 50kA |
| Peak Withstand Current | 100kA / 125kA |
| Operating Method | Motor-driven operation with manual emergency operation |
| Mechanism Box Protection | IP54 |
| Applicable Standard | IEC 62271-102 |
The 220kV Disconnect Switch is widely used in high-voltage power transmission systems, including:
With reliable isolation performance and strong environmental adaptability, this equipment supports safe and stable operation of modern power systems.
The 220kV Disconnector is designed for outdoor installation and can operate reliably under various environmental conditions.
The product can be customized according to different project requirements, including insulation solutions, operating mechanisms, and environmental adaptation features.
As an experienced China manufacturer of high voltage substation equipment, we focus on providing reliable and customized power transmission solutions. Our 220kV Disconnect Switch combines advanced structural design, durable materials, and strict quality control to meet the demanding requirements of modern power systems.
With compliance with IEC standards, flexible configuration options, and professional technical support, our 220kV Disconnector provides a dependable solution for safe isolation and efficient operation of high-voltage substations.
