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Home > Electrical & Electronics > Power Supply & Distribution > Switchgear > FLN36 Series Indoor AC High Voltage LBS SF6 Insulated for 11kV and 33kV Applications

FLN36 Series Indoor AC High Voltage LBS SF6 Insulated for 11kV and 33kV Applications

FLN36 Series Indoor AC High Voltage LBS SF6 Insulated for 11kV and 33kV Applications thumbnail-3

FLN36 Series Indoor AC High Voltage LBS SF6 Insulated for 11kV and 33kV Applications thumbnail-4

FLN36 Series Indoor AC High Voltage LBS SF6 Insulated for 11kV and 33kV Applications photo-1

FLN36 Series Indoor AC High Voltage LBS SF6 Insulated for 11kV and 33kV Applications photo-2

FLN36 Series Indoor AC High Voltage LBS SF6 Insulated for 11kV and 33kV Applications photo-3

FLN36 Series Indoor AC High Voltage LBS SF6 Insulated for 11kV and 33kV Applications photo-4

Product Spotlights

The FLN36 Series is a maintenance-free, indoor AC high voltage Load Break Switch utilizing SF6 gas insulation for superior safety and compactness in 11kV & 33kV networks. Its sealed design eliminates external arcing, protects against environmental factors, and ensures reliable load breaking and isolation. Featuring a long mechanical life, optional motorization, and a space-saving modular build, it reduces total ownership costs and enhances safety for utilities, industries, and commercial power distribution.

US$ 350 ≥10 Units

Key Specifications

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Product Series:

FLN36 Series

Application Voltage:

11kV and 33kV

Insulation Medium:

SF6 Gas

Contact Supplier Request Quote Chat Now

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
Company Profile
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Product Series FLN36 Series

Application Voltage 11kV and 33kV

Insulation Medium SF6 Gas

Type Indoor AC Load Break Switch (LBS)

Installation Environment Indoor

Rated Current 630A, 1250A (Typical)

Short-Circuit Withstand Current 25kA, 31.5kA (Typical)

Mechanical Life 10,000 operations (Minimum)

Operating Mechanism Manual Spring, Optional Motorized

As a dedicated manufacturer, Jinhua Dika Electrical Equipment Co., Ltd. brings over a decade of expertise to the power distribution industry with our FLN36 Series. This Indoor AC High Voltage Load Break Switch (LBS) is engineered for reliable, safe, and compact switching and isolation in 11kV and 33kV secondary distribution networks. Designed with the modern substation in mind, it offers a maintenance-free SF6 insulated solution that enhances operational safety while minimizing footprint and lifecycle costs for utilities, industrial plants, and commercial complexes worldwide.

The FLN36 Series represents a significant advancement in medium voltage switchgear technology. Its core value lies in providing a robust and secure method for load breaking, isolation, and earthing, all contained within a sealed, SF6-filled enclosure. This design virtually eliminates external arcing, protects internal components from environmental contamination, and ensures consistent performance over a long service life. For engineers and project managers seeking to upgrade or build new electrical infrastructure, the FLN36 offers a dependable, space-saving, and safety-focused component that integrates seamlessly into indoor switchgear panels and compact substations.

Key Features & Technical Advantages:

Superior SF6 Gas Insulation: The switch contacts are permanently sealed in a stainless steel tank filled with SF6 gas at low pressure. This provides excellent dielectric strength, effective arc quenching during load breaking, and superior protection against moisture, dust, and corrosive atmospheres compared to air-insulated designs.
Enhanced Safety & Reliability: The fully enclosed design contains all switching arcs internally, preventing any risk of external flashovers. The gas-tight sealing ensures stable insulating performance and eliminates the need for contact maintenance. A viewing window or position indicator provides clear visual confirmation of the switch status (ON/OFF/EARTH).
Compact and Modular Design: Engineered for space efficiency, the FLN36 allows for high-density installation in switchgear panels. Its modular construction facilitates easy cabling, installation, and future panel extensions, making it ideal for applications where space is at a premium.
Versatile Operating Configurations: Available with a manual spring-operated mechanism for standard applications. For remote control and automation integration, a motorized operating mechanism is available as an option, enabling seamless integration into SCADA and smart grid systems.
Robust Construction & Long Life: The main tank is constructed from high-quality, corrosion-resistant stainless steel. The moving contact system and operating mechanism are designed for high endurance, typically exceeding 10,000 mechanical operations without degradation in performance.
Flexible Earthing Options: The series often includes models with integrated three-position functionality (Make-Break-Isolate-Earth), allowing for safe earthing of the downstream circuit directly from the switch, enhancing personnel safety during maintenance.

Detailed Technical Specifications:

Parameter	Specification for 11kV	Specification for 33kV
Rated Voltage (Ur)	12 kV	36 kV
Rated Normal Current (Ir)	630A, 1250A	630A, 1250A
Rated Short-Time Withstand Current (Ik)	25 kA / 3s	25 kA / 3s
Rated Peak Withstand Current (Ip)	63 kA	63 kA
Power Frequency Withstand Voltage	42 kV / 1 min	70 kV / 1 min
Lightning Impulse Withstand Voltage	75 kV	170 kV
SF6 Gas Pressure (20°C)	Approx. 1.4 bar (abs)	Approx. 1.4 bar (abs)
Mechanical Life	≥ 10,000 operations
Operating Temperature Range	-25°C to +40°C

Customer Benefits & Applications:

Reduced Total Cost of Ownership: The maintenance-free design eliminates costs associated with contact cleaning, lubrication, and adjustment. Long service life and high reliability reduce unplanned downtime and replacement expenses.
Maximized Safety for Personnel & Assets: The sealed SF6 chamber and internal arc containment significantly lower the risk of electrical accidents, creating a safer working environment in substations and switch rooms.
Space Optimization: Its compact dimensions allow for more circuits within a given panel size, enabling efficient use of valuable indoor real estate in data centers, industrial plants, and high-rise buildings.
Application Versatility: Perfect for a wide range of indoor applications including: ring main units (RMU), transformer feeder protection, sectionalizing in secondary distribution networks, switching for capacitor banks, and as an incomer/outgoer switch in compact substations.
Environmental Resilience: Performs reliably in demanding indoor environments where dust, humidity, or chemical vapors might compromise air-insulated switches.

Trust in a product backed by a manufacturer with a global footprint. Jinhua Dika Electrical serves markets across North America, South America, Europe, Asia, Africa, and Oceania, demonstrating the universal applicability and reliability of our components. Our commitment to systematic management is reflected in our adherence to recognized standards. With efficient logistics through major ports like Shanghai, Tianjin, Guangzhou, and Ningbo, we ensure timely delivery to support your project schedules. The FLN36 Series is more than just a switch; it's a strategic investment in the safety, efficiency, and longevity of your medium voltage power distribution system. Contact us today to discuss your specific 11kV or 33kV application requirements and receive detailed technical documentation.

Frequently Asked Questions (FAQ):

What is the primary advantage of SF6 insulation in this Load Break Switch?
SF6 gas offers a dielectric strength significantly higher than air, allowing for a much more compact switch design. It also acts as an excellent arc-quenching medium, ensuring clean and reliable interruption of load currents while containing all arc by-products within the sealed chamber, enhancing safety and reducing maintenance.
Is this switch suitable for outdoor installation?
The FLN36 Series is specifically designed and tested for indoor applications. For outdoor use, a different product series with appropriate weatherproofing and corrosion protection would be recommended. Please inquire for outdoor solutions.
Can the switch be motorized for remote operation?
Yes. While a standard manual spring-operated mechanism is common, a motorized operating mechanism is available as a configurable option. This allows for integration into remote control, automation, and SCADA systems for unmanned substations.
How often does the SF6 gas need to be checked or refilled?
The switch is designed as a sealed-for-life, maintenance-free unit under normal operating conditions. The stainless steel tank and high-quality seals are engineered to maintain gas integrity for decades. A pressure gauge or density monitor is typically provided to indicate gas status visually.
What are the typical busbar connection sizes and types?
Connections are usually designed for standard copper or aluminum busbars. Common sizes align with the rated current (e.g., for 630A and 1250A ratings). Specific connection dimensions and bolt patterns are provided in the detailed installation drawings available upon request.
Does the switch provide earthing functionality?
Many models in the FLN36 Series are three-position switches, offering ON, OFF, and EARTH positions. The earthing function allows for the safe grounding of the downstream circuit directly through the switch, a critical safety feature for maintenance work.
What testing is performed on these switches before shipment?
Each unit undergoes routine tests including power frequency withstand voltage tests, mechanical operation tests, contact resistance measurement, and gas leak detection to ensure it meets the specified performance and safety criteria.
What is the lead time for standard and customized orders?
Lead times vary based on order quantity, voltage rating, and specific configuration (e.g., manual vs. motorized). Standard configurations typically have shorter lead times. Please contact our sales team with your project details for an accurate delivery schedule.