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Home > Electrical & Electronics > Power Supply & Distribution > Switchgear > SF6 Gas Insulated Load Break Switch Disconnector, 3 Phase, 40kV Max Voltage for Indoor Substations

SF6 Gas Insulated Load Break Switch Disconnector, 3 Phase, 40kV Max Voltage for Indoor Substations

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SF6 Gas Insulated Load Break Switch Disconnector, 3 Phase, 40kV Max Voltage for Indoor Substations photo-4

SF6 Gas Insulated Load Break Switch Disconnector, 3 Phase, 40kV Max Voltage for Indoor Substations photo-5

Product Spotlights

A compact, 3-phase SF6 gas insulated switch combining load-breaking and disconnecting functions for indoor substations up to 40kV. Features sealed SF6 insulation for enhanced safety and arc-quenching, robust construction for reliability, and optional motorized operation. Designed to save space, reduce maintenance, and improve operational safety in utility and industrial power distribution networks.

US$ 450 ≥10 Units

Key Specifications

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Rated Voltage:

Maximum 40kV

Number of Phases:

3 Phase

Insulation Medium:

SF6 Gas

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Jinhua Dika Electrical Equipment Co., Ltd.

1Yr

Payment & Shipping

Payment Methods:

Port of Shipment:

China

Delivery Detail:

Delivery time depends on order quantity.

Product Details
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Rated Voltage Maximum 40kV

Number of Phases 3 Phase

Insulation Medium SF6 Gas

Application Indoor Substations

Type Load Break Switch Disconnector

Installation Type Indoor, Fixed Mounting

Operating Mechanism Manual or Motorized (Optional)

Interlocking System Mechanical Safety Interlocks

As a specialized manufacturer of electrical distribution equipment, Jinhua Dika Electrical Equipment Co., Ltd. leverages its expertise to produce reliable SF6 Gas Insulated Load Break Switch Disconnectors designed for modern indoor substations. This 3-phase switch, rated for a maximum voltage of 40kV, represents a critical component for safe and efficient power isolation and switching. Engineered with a focus on durability and operational safety, it provides a maintenance-friendly solution for utility companies and industrial facilities seeking to enhance their medium-voltage network reliability. Our commitment to quality manufacturing processes ensures each unit delivers consistent performance in demanding electrical environments.

Core Product Features & Technical Advantages:

SF6 Gas Insulation: Utilizes Sulfur Hexafluoride (SF6) gas as the primary insulating and arc-quenching medium. This technology offers superior dielectric strength compared to air, allowing for a more compact switch design while effectively extinguishing arcs generated during load-breaking operations, ensuring equipment longevity.
Integrated Load Break & Disconnector Function: Combines the capabilities of a load-break switch (capable of interrupting rated load currents) and an isolator/disconnector (providing visible isolation for maintenance) in a single, integrated apparatus. This dual functionality simplifies substation layout and reduces the need for separate devices.
Designed for Indoor Applications: Specifically constructed for installation within indoor substation buildings or enclosures. The design considers factors like reduced clearances, protection from direct weather exposure, and integration with other indoor switchgear, contributing to a space-saving and controlled environment setup.
Robust Construction for 40kV Systems: Built to reliably handle the electrical stresses of systems up to 40kV. All live parts are enclosed within a sealed, pressurized chamber filled with SF6 gas, minimizing the risk of external flashovers and enhancing personnel safety.
Safe and Clear Operation: Features a secure operating mechanism with clear ON/OFF indicators. Mechanical safety interlocks are typically incorporated to prevent incorrect operation sequences, such as opening under load without the proper arc-quenching function engaged.
Low Maintenance Requirements: The sealed SF6 gas system is designed for long-term stability, requiring minimal routine maintenance. Gas density monitors are often provided to indicate the insulation level, alerting operators to any potential leakage.

Key Technical Specifications:

Parameter	Specification / Value
Rated Voltage (Maximum)	40 kV
Number of Phases	3
Rated Normal Current	630A, 1250A, or as per customer requirement
Insulation Medium	SF6 Gas
Short-Time Withstand Current (3-sec)	Typically 25 kA or 31.5 kA (Customizable)
Making & Breaking Capacity	Capable of making and breaking rated load currents
Operating Mechanism	Manual (standard), Motorized operation (optional)
Mechanical Life	10,000 operations minimum
Ambient Temperature Range	-25°C to +40°C (for indoor application)

Benefits for Your Operation:

Enhanced Safety: The sealed SF6 gas chamber and visible isolation gap significantly reduce risks to operating personnel during maintenance, meeting high safety standards for indoor electrical rooms.
Space Optimization: The compact design enabled by SF6 insulation is ideal for indoor substations where floor space is at a premium, allowing for more equipment within a given footprint or enabling smaller building designs.
Improved Reliability: By combining switching and isolation functions reliably, network availability increases. The robust design minimizes failure points and ensures dependable operation over its long service life.
Reduced Operational Costs: Low maintenance needs and high mechanical durability translate into lower lifetime costs. The integrated design can also reduce installation time and complexity compared to separate switch-disconnector setups.
Flexibility in System Design: Suitable for a wide range of indoor applications, including primary distribution in industrial plants, commercial complexes, data centers, and renewable energy integration points up to 40kV.

Backed by Jinhua Dika Electrical's established manufacturing framework, which includes a structured quality management system, this SF6 Load Break Switch Disconnector is a product of rigorous engineering and production control. Our annual export volume reflects a proven track record of supplying reliable electrical equipment to diverse markets worldwide, from North America and Europe to Southeast Asia and Africa. We understand the critical nature of distribution equipment and build each switch to provide a dependable, long-term solution for your indoor substation needs. For detailed specifications, customization options such as different current ratings or motorized drives, and to discuss how this switch can integrate into your specific project, please contact our technical sales team for a comprehensive consultation.

Frequently Asked Questions (FAQ)

Q: What is the primary advantage of using SF6 gas in this load break switch?
A: SF6 gas possesses excellent insulating and arc-quenching properties. This allows the switch to be more compact than air-insulated equivalents for the same voltage level and ensures arcs are extinguished quickly and effectively during load-breaking, protecting the contacts and ensuring a long operational life.
Q: Can this switch be used for outdoor applications?
A: No, this specific model is engineered and rated for indoor substation use. Outdoor applications require equipment with different environmental protections (like sealed enclosures for moisture and UV resistance) and typically different design standards. We offer other products suitable for outdoor environments.
Q: What is the difference between a Load Break Switch and a Disconnector/Isolator?
A: A Load Break Switch (LBS) is designed to safely interrupt normal load currents. A Disconnector or Isolator provides a visible air gap for safety during maintenance but is not designed to interrupt current. This product integrates both functions: it can break load currents and then provide a safe, visible isolation point.
Q: Is a motorized operating mechanism available?
A: Yes, while a manual operating mechanism is standard for local operation, a motorized drive option is often available for remote control and automation integration. This can be specified during the ordering process.
Q: How is the SF6 gas pressure monitored?
A: The unit typically includes a gas density gauge or monitor. This device indicates the pressure (and thus density) of the SF6 gas inside the sealed chamber. It provides a visual indication to operators if the gas pressure falls outside the recommended range, which is crucial for maintaining proper insulation.
Q: What are the typical maintenance requirements for this switch?
A: Maintenance requirements are minimal due to the sealed gas system. Routine activities mainly involve visual inspection of external components, checking the gas pressure indicator, verifying proper mechanical operation, and ensuring electrical connections are tight. Major internal inspection intervals are very long, often spanning several years.
Q: Can you provide switches with different current ratings (e.g., 630A vs. 1250A)?
A: Absolutely. We can manufacture these switches to various standard rated normal currents, such as 630A, 1250A, or others as required by your project specifications. Please provide your specific current rating needs during inquiry.
Q: Does this product come with safety interlocks?
A: Yes, mechanical safety interlocks are a standard and critical feature. They prevent unsafe operating sequences, such as attempting to open the switch under load without engaging the arc-quenching mechanism or closing onto a fault, thereby protecting both personnel and the equipment.