Isolation Switch Outdoor Manual Motorized

The Isolation Switch Outdoor Manual Motorized is a core product of Usune, specifically designed for outdoor AC circuits with a rated frequency of 50Hz and a rated voltage of 35kV~170kV. It is a key piece of equipment for ensuring the safe and stable operation of power systems and can also serve as the basic unit for this series of derivative products. The products are manufactured in strict accordance with IEC 62271-102 "High-voltage AC disconnect switches and grounding switches" and IEC 60694 "General technical conditions for high-voltage switchgear and controlgear," ensuring professional expertise and product reliability.

Featuring a horizontal rotary switching structure, this switch boasts high insulation levels, strong pollution resistance, stable mechanical performance, and convenient installation and maintenance. It supports both manual and electric operation and can be configured with a grounding switch as needed. It is adaptable to harsh outdoor environments such as high altitudes, low temperatures, and heavy pollution. As a reliable supplier, Usune strictly adheres to international standards and rigorously controls product quality to provide customers with high-quality, safe, and durable disconnect switches.

Core Application Scenarios

The Outdoor Manual Motorized Isolation Switch is widely used in outdoor power transmission and distribution systems in power grids, industrial and mining enterprises, urban construction, and new energy power generation. It is suitable for applications requiring frequent power isolation and safety maintenance, and is particularly well-suited for harsh outdoor environments, effectively ensuring the continuity and safety of power supply.

Product Core Parameters

The product boasts excellent technical performance and covers a variety of specifications. Its core parameters are as follows:
- Rated Voltage: 35kV~170kV
- Rated Current: 630A~2500A
- Rated Short-Time Withstand Current: 20kA/s~50kA/s
- Rated Peak Withstand Current: 50kA~125kA
- Main Circuit Resistance: ≤125μΩ (varies depending on model)
- One-Minute Power Frequency Withstand Voltage: 80kV~200kV
- Lightning Impulse Withstand Voltage: 115kV~860kV (varies depending on model and grounding switch)
- Operating Mechanism: Manual (CS11, CS17D, CS14G series) or Electric (CJ2 type)

Product Main Structure

Isolation Switch Outdoor Manual Motorized employs a double-post handshake structure. Each phase consists of a base, post insulators, outgoing terminals, and contacts. The two post insulators are mounted parallel to each other on bearing seats at both ends of the base and perpendicular to the base. The main conductive part rotates approximately 90° with the post insulators. The middle contact features a self-cleaning rotating structure, which removes dust and dirt from the contact during opening and closing, ensuring reliable contact. The rotating parts adopt a sealed, maintenance-free design, and the transmission components use stainless steel pins and molybdenum disulfide-containing nylon bushings, which are corrosion-resistant and rust-free.

Core Product Features

1. High Reliability

The contact fingers use a new type of high-strength, high-conductivity, and high-elasticity material. They rely on their own elasticity to clamp the contacts, avoiding contact failure caused by spring corrosion and heat annealing. This conductive component structure has obtained a national utility model patent.

2. Harsh Environment Adaptability

Adaptable to altitudes ≤2000m, ambient temperatures -40℃ to +40℃, wind speeds ≤34m/s, and seismic intensity ≤8 degrees. Creepage distance meets the Class III or IV requirements of GB/T5582. Strong resistance to pollution and icing (ice thickness ≤10mm).

3. Dual Operation Modes

Supports both manual and electric operation, selectable as needed. The manual mechanism is easy to operate, while the electric mechanism (CJ2 type) is driven by an AC motor via a reduction gear, offering high efficiency and labor-saving performance.

4. Safety Interlock

When equipped with a grounding switch, the main conductive circuit and the grounding switch are reliably interlocked, ensuring that the grounding switch cannot close when the main circuit is closed, and vice versa, preventing accidental operation.

5. Convenient Installation and Maintenance

The phase-to-phase and vertical connecting rods adopt a clamping structure, eliminating the need for pins and welding, resulting in high installation efficiency. Rotating parts are maintenance-free, simplifying routine inspections and maintenance, reducing long-term operating costs.

1. Finger touch base
2. Finger touch
3. Magnetic lock plate
4. Bolt
5. Contact
Figure 2 Schematic Diagram of Dominant Electrical Contact Points

1. Ground knife static contact head
2. Contact finger
3. Positioning plate
4. Ground knife tube
Figure 3 Schematic diagram of the position of the grounding tube and the positioning plate

Figure 4 Hoisting Diagram

Project Reference

Cas-space Rocket Launch Project

Test Report

Real-world Application Case

Case Study: High-Altitude Power Grid Project in Western China

A power grid company in western China is undertaking a 110kV transmission line upgrade project. Located at an altitude of 1800m, the project experiences an average annual temperature of -15℃ to 25℃, frequent strong winds, and heavy snowfall in winter. The project selected Usune GW4(A)-126(D)(W)/1250 disconnecting switches (equipped with CJ2 electric operating mechanisms and grounding switches). Over the past three years, the product has demonstrated excellent environmental adaptability, with no insulator damage or contact overheating. Opening and closing operations are smooth, and it can still operate normally even with 8mm of ice accumulation in winter, ensuring stable power grid operation. As the manufacturer, Usune provided on-site installation guidance and regular maintenance services for the project, earning high praise from the client.

FAQ

Q1: What should I do if the manual operating torque of the Usune outdoor disconnecting switch increases during use?

A1: The main reason for the increased manual operating torque is that the lubricating oil in the rotating parts of the transmission system has dried out, become dirty, or the shaft pins are rusted, leading to increased transmission resistance. Solution: First, stop operation. After confirming the isolating switch is in the open position and the high-voltage line is grounded, disassemble the rotating parts, clean away accumulated dirt and rust, and apply an appropriate amount of lubricant. If the problem persists, contact the Usune after-sales service team for professional repair. The Usune factory has professional repair personnel and spare parts to provide timely support.

Q2: Can the Usune Isolation Switch Outdoor Manual Motorized be used in areas with severe chemical corrosion? If so, what precautions should be taken?

A2: It can be used in areas with mild to moderate chemical corrosion. Key precautions: 1. Inform the supplier of the corrosion level of the environment when ordering. Usune will customize anti-corrosion treatment (such as hot-dip galvanizing of reinforced steel components and selection of special anti-corrosion insulators); 2. Regularly clean the surface of insulators and conductive parts to remove corrosive substances; 3. Shorten the routine inspection cycle, focusing on checking the contact surface and insulator condition, and replace damaged parts promptly. For areas with severe chemical corrosion, consult the Usune technical department for customized solutions.

Product Supply and After-Sales Service

Every Usune Isolation Switch Outdoor Manual Motorized comes equipped with complete installation accessories and the operating mechanism ordered by the customer, along with a product certificate, installation and operation manual, and accessories list. As a supplier rooted in China, Usune has a comprehensive production and after-sales system: the factory has a strict quality inspection process to ensure that every product is qualified before leaving the factory; the after-sales service team provides on-site installation guidance, debugging, maintenance, and other services, responding to customer needs 24 hours a day, and is committed to providing high-quality products and attentive service to customers at home and abroad, building long-term and stable cooperative relationships.