Sf6 Gas Insulated Switchgear

The USRM6 series Sf6 Gas Insulated Switchgear is a fully insulated system independently developed by USUNE. Its main circuit switch performance and all electrical components are sealed and insulated with pressurized SF6 gas. The fully enclosed structure protects the entire device from external environmental influences, effectively ensuring operational reliability and personnel safety, achieving maintenance-free operation throughout its entire life cycle. The product adopts a standard modular unit and fixed combination modular unit design, supporting expandable main busbar selection. It achieves full modularity, full insulation, and full enclosure, ensuring high reliability and safety while meeting the flexible and compact switchgear requirements of power grid nodes, end users, and secondary substations through rich module combinations.

Core Product Features

1. Modular Design, Flexible Combination

Integrating multiple functional modules such as load switch units (C), load switch + fuse combination units (F), circuit breaker units (V), metering units (M), and busbar PT units (PT), it can be freely combined into ring main units, flexibly adapting to different power distribution scenarios and user needs, significantly improving product applicability and flexibility.

2. Fully Insulated Enclosed Structure

The Sf6 Gas Insulated Switchgear main circuit section (main busbar) and switch performance are encapsulated within a stainless steel welded gas box. The main circuit is connected to the outside through a gas box bushing conforming to DIN47636 standards. Incoming and outgoing cables are connected using fully insulated enclosed detachable connectors. The gas box boasts an IP67 protection rating, effectively isolating the external environment and providing short-term flood and condensation protection, ensuring stable operation even in harsh conditions.

3. Flexible and Expandable Design

It can be combined with various standard modular units to form a standard cabinet-type, non-expandable fixed ring network switch (a single SF6 insulated gas box can be combined with up to 6 units). It can also be combined with different modules to form expandable units, achieving various combination forms through dedicated fully insulated busbar connectors to meet the power dispatching needs of different regions, types, and customers.

4. High Safety and Reliability

The main circuit components and switch performance are encapsulated within the stainless steel gas box, connected to the outside via bushings to avoid direct contact with live parts. Equipped with reliable pressure relief devices and channels, it effectively protects personnel and equipment safety in case of accidents. A comprehensive mechanical interlocking device minimizes the risk of misoperation, further enhancing safety and reliability.

5. High Reliability of the Operating Mechanism

The SF6 Gas Insulated Switchgear is equipped with a self-developed and designed spring operating mechanism. Through comprehensive quality control from design to production and break-in, the mechanism's reliability and stability are ensured, providing a high-quality operating mechanism solution for the USRM6 series and similar SF6 gas-insulated switchgear.

Technical Parameters and Usage Conditions

1.Core Technical Parameters

2. Usage Conditions

- Altitude: ≤4000m (For altitudes above 1000m, please notify the supplier in advance to adjust the inflation pressure; for altitudes above 2000m, adjust the pressure to eliminate overvoltage within the cabinet.)
- Ambient Temperature: Maximum +50℃, Minimum -40℃, 24-hour average temperature not exceeding 35℃
- Ambient Humidity: 24-hour relative humidity not exceeding 95%, monthly relative humidity not exceeding 90%
- Installation Environment: No explosive or corrosive gases in the surrounding environment; no severe vibration or impact at the installation site; pollution level not exceeding Class III as specified in GB/T5582.

3. Applicable Standards

Strictly adheres to multiple national and industry standards such as GB3804-2004 and GB1984-2014 to ensure product professionalism and authority, meeting the needs of various usage scenarios.

Application Scenarios

The Sf6 Gas Insulated Switchgear integrates multiple functions and boasts advantages such as small size, maintenance-free operation, and unaffected main circuit by external environmental factors. It is particularly suitable for harsh environments such as underground, high-altitude, and coastal locations, and is widely used in industrial and mining enterprises, railways, airports, city centers, and residential areas in China and globally, providing stable and reliable power supply support for various power distribution systems.

Operation, Transportation, and Maintenance

1. Operating Procedures

All switches must be operated using the matching handle. Load switches/vacuum switches and corresponding grounding switches are mechanically interlocked, and additional padlocks can be added to prevent accidental operation. Grounding switches employ a quick-operation mechanism: clockwise rotation of the handle closes the circuit, counterclockwise rotation opens it. Before opening or closing the load switch-fuse combination unit or circuit breaker, energy must be stored. After energy storage is complete, press the green button to open or close the circuit. The product is equipped with five safety interlock functions; power supply and disconnection operations must strictly adhere to the specifications.

2. Transportation and Storage

The Sf6 Gas Insulated Switchgear is equipped with lifting rings for hoisting and forklift handling. Upon receipt, inspect for any damage during transport; any damage must be immediately reported to the carrier. After unpacking, check the integrity of the operating handle, ensure the pressure gauge pointer is in the green zone, and perform functional tests on the mechanical parts. Any defects or omissions must be reported to the supplier promptly. Before installation and use, store in a dry, ventilated place and properly covered.

3. Maintenance Instructions

All components of the Sf6 Gas Insulated Switchgear are maintenance-free within their specified service life. The gas tank is made of stainless steel; damaged instrument panels must be promptly repaired with paint for corrosion protection. Externally mounted mechanical parts facilitate operation and replacement; corrosion protection and lubrication have been applied before shipment. In extreme environments, rotating parts require regular inspection and maintenance, and replacement if necessary. Under normal operating conditions, no special inspections are required; before operation, ensure the pressure gauge pointer is in the green zone.

Signal Indication and Control Components

1. High-Voltage Live-Line Display and Interlocking Device

Features live-line component detection and phase verification functions. Electrical interlocking and a matching magnetic lock prevent the cable compartment door from being opened when the incoming cable is energized, ensuring personnel safety.

2. Fault Indicator

Can be equipped with a panel fault indicator as needed. In the event of a phase-to-phase or ground fault, personnel can confirm the energized status and fault area through the alarm indicator, quickly locating the fault point. Alarm information can be transmitted to the monitoring center to assist patrol personnel in confirming the fault section and location.

3. Microcomputer Protection and Control Device

A digital current and voltage protection and measurement device suitable for the protection, measurement, and control of primary equipment such as lines and distribution transformers. It can replace traditional electromagnetic relay protection. Through user terminal networking, it can realize orderly power consumption detection, alarm, control, and intelligent power internet, improving the intelligence level of the power distribution system.

Supplier Commitment

As a professional manufacturer and supplier of Sf6 Gas Insulated Switchgear, Zhejiang Usien Electric Co., Ltd. is committed to providing high-quality USRM6 series products to global customers. We have a comprehensive pre-sales, sales, and after-sales service system: pre-sales includes technical consultation and solution design; sales includes installation guidance and commissioning; and after-sales includes timely maintenance and spare parts supply. Our factory adheres to a quality-first principle, strictly controlling all aspects of production to ensure products meet standards and user needs, striving to become a trusted partner for users in the power distribution field in China and globally.

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.