Outdoor Substation Disconnector Switch

The Usune GW4 series Outdoor Substation Disconnector Switch is a core product independently developed and manufactured by Usune. It is suitable for AC circuits with a rated frequency of 50Hz and a rated voltage of 35kV to 170kV. Primarily used for circuit opening and closing under no-load conditions, it is an indispensable safety component in power transmission and distribution systems. It can also serve as a basic unit for derivative products in the same series, offering strong expandability to meet diverse project needs.

The Outdoor Substation Disconnector Switch adopts a horizontal rotary switching structure, featuring stable mechanical performance, high insulation level, strong pollution resistance, and convenient installation and maintenance. It effectively isolates power supplies, ensures the safety of electrical equipment maintenance, and completes no-load switching operations, making it suitable for various harsh outdoor environments such as high altitude, low temperature, and heavy pollution.

Core Product Functions

1. Power Isolation: Effectively disconnects the equipment from the power grid, ensuring the safety of maintenance personnel and equipment;
2. Long-Term Load Capacity: Can stably carry rated load current for extended periods, ensuring continuous power supply;
3. No-Load Switching: Completes no-load switching of unloaded lines and transformers, as well as busbar switching operations, meeting the flexible adjustment needs of the power grid;
4. Grounding Protection: Can be configured with a grounding switch as needed to achieve reliable circuit grounding, further enhancing operational safety.

Compliance Standards

To ensure product quality and operational safety, the Usune GW4 series strictly adheres to international authoritative standards, including IEC 62271-102 "High Voltage AC Disconnect Switches and Grounding Switches" and IEC 60694 "General Technical Conditions for High Voltage Switchgear and Controlgear". The factory implements a rigorous quality inspection process. Each product undergoes comprehensive performance testing before leaving the factory to ensure all parameters meet standard requirements.

Product Technical ParametersThe Usune GW4 series includes multiple models such as GW4(A)-35(D)(W), GW4(A)-126(D)(W), and GW4(A)-170(D)(W), with rated currents ranging from 630A to 2500A, suitable for different voltage levels and load scenarios. Core technical parameters (key indicators) are as follows:

In addition, the products are equipped with CS11, CS17D, and CS14G manual operating mechanisms and CJ2 electric operating mechanisms. Auxiliary switch configurations are optimized according to the mechanism type to ensure flexible and reliable operation.

Main Product Structure

1. Sealed Bearing Housing

Double-sealed design, the shaft assembly is supported by two radial ball bearings, effectively preventing the intrusion of moisture, dust, and harmful gases.

2. Self-acting Contact Finger

The middle contact uses a self-acting contact finger, eliminating the need for a spring. It relies on its own elasticity to clamp the contact, ensuring stable contact and reducing maintenance costs.

3. Interlocking Structure

The main conductive circuit and the grounding switch are equipped with an interlocking mechanism, ensuring that the grounding switch cannot close when the main circuit is closed, and vice versa, preventing misoperation.

4. Flexible Connection

The flexible connection inside the outgoing base is firmly fixed to the conductive rod and terminal plate. Oil-free self-lubricating bearings ensure smooth rotation and extend service life.

Core Features

1. Professional Design + Patent Protection

Usune has a professional R&D team with many years of experience in high-voltage electrical equipment design. The GW4 series conductive component structure has obtained a national utility model patent. The contact finger uses a new material with high strength, high conductivity, and high elasticity, avoiding problems such as spring corrosion, decreased clamping force due to heat annealing, and increased contact resistance.

2. Mature Performance + Reliable Technology

The GW4 series has been on the market for many years, with mature production technology and stable performance. Rotating components feature a maintenance-free design, and transmission parts utilize stainless steel pins paired with molybdenum disulfide-containing nylon bushings. Steel components undergo hot-dip galvanizing to ensure smooth operation and long-term rust prevention.

3. Standard Compliance + Strict Quality Control

As a professional manufacturer, Usune strictly adheres to international standards in its production process. The factory boasts a comprehensive quality control system, overseeing the entire process from raw material procurement to product assembly and testing. Products have passed numerous authoritative tests and certifications, and their performance is widely recognized in the industry.

4. Reliable Quality + Comprehensive Service

Usune prioritizes customer satisfaction, providing comprehensive pre-sales consultation, installation guidance, and after-sales maintenance services. Products have a long service life and low maintenance costs, and the factory provides comprehensive after-sales support to address customer concerns.

Application Environment

The Usune GW4 series Outdoor Substation Disconnector Switch is designed for harsh outdoor environments, exhibiting strong environmental adaptability. Operating conditions must meet the following requirements: altitude not exceeding 2000m; ambient temperature -40℃ to +40℃; wind speed not exceeding 34m/s; seismic intensity not exceeding 8 degrees; icing thickness not exceeding 10mm; absence of heavy dust, chemical corrosion, strong vibration, and flammable/explosive hazards; and a level installation foundation. If the user's application environment exceeds the above requirements, a customized solution can be negotiated with Usune.

Real-world Application Case

Project Name: 110kV Outdoor Substation Renovation Project in Northern China

Project Background: This substation is located in a northern Chinese city, experiencing severe winters (minimum temperature -35℃) and frequent strong winds. The original disconnector switch suffered from poor low-temperature resistance, unstable operation, and high maintenance costs. After comprehensive comparison, the project team selected the Usune GW4-126(D)(W)/1250 Outdoor Substation Disconnector Switch. Usune provided a complete product suite and installation guidance services.

Application Results: The product has operated stably for 3 years after commissioning, demonstrating excellent low-temperature resistance and wind resistance. Its opening and closing operations are flexible and reliable. The self-cleaning contact function effectively prevents contact failures caused by dust and snow accumulation, and the maintenance-free design reduces the daily maintenance workload of the substation. The project owner highly recognizes the performance and after-sales service of Usune products and has signed a long-term cooperation agreement with Usune, designating it as the designated manufacturer for subsequent substation renovation projects.

FAQ

Q1: What should I do if the Usune GW4 series disconnecting switch fails to open or close properly during use?

A1: First, visually inspect whether the connecting rod is deformed, whether the joint is loose, and whether the clamp is loose or slipping. A deformed connecting rod needs to be replaced; loose joints and clamps need to be tightened with a torque wrench according to the torque specified in the manual (refer to Table 5). If the manual operation torque increases significantly, it may be due to dried-out lubricant on the rotating parts or rust on the shaft pin. Clean and lubricate the rotating parts to ensure smooth operation.

Q2: What are the maintenance cycles and key points for the Usune GW4 series disconnecting switches?

A2: The product is designed to be maintenance-free, but regular inspection and maintenance are recommended to ensure long-term stable operation: A simple on-site inspection should be performed every 2 years; when out of service, maintenance should be performed every 5 years or every 2000 operations; a major overhaul should be performed every 10 years or every 5000 operations. Key maintenance points include: checking the integrity of mechanical parts and insulators, measuring the resistance of the main conductive circuit, checking bolt tightness, and testing the operating status of auxiliary switches and interlocking electrical components.

Product Supply and Ordering Instructions

1. Product Supply Completeness: Each Usune GW4 series disconnect switch and grounding switch shipped comes with installation accessories and the operating mechanism ordered by the user, along with a product certificate, installation and operation manual, and accessory list to ensure smooth installation and use.

2. Ordering InstructionsWhen ordering, please specify: product model, name, rated current, rated voltage, whether a grounding switch is configured (single grounding/double grounding); type, model, and name of the operating mechanism; power supply and voltage rating of the electromagnetic lock (if any); model and control voltage of the electric operating mechanism (if any). If special technical documents or installation accessories are required, please specify when ordering.

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

FAQs

1. Are you factory or trading company?

Factory, we can guarantee our price is reasonable and competitive.

2. When can I have the price?

Usually we quote within 24 hours after receiving your inquiry.

3. Can we print our logo and company name on products?

Yes, of course, we accept OEM.

4. What is the lead time?

The lead time depends on the quantities ordered, normally within 15-20 days after receiving the payment.

5. How's your quality control process?

All products will be inspected starting from accessories, and will be carried out with routine tests before leaving our factory.

6. How to solve the quality problems after sales?

Take photos or video of the quality problems and send to us for our checking and confirming, and we will make a satisfied solution for you within 1-3 days.

7. What's the warranty time?

12 months from shipping date.

8. Why choose us

● We are specialized in the field for more than 14 years, and has a well experienced R&D team taking the design and development work for each project based on customer's special demands.
● We have extremely strict QC procedure from components to finished products.
● Steady production period within 15-20 days.
● We have full set of test reports for products.
● One step solution provided.