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Home > Electrical & Electronics > Power Supply & Distribution > Switchgear > SF6 Load Break Switch for Substation Secondary Side Protection, 12-36kV

SF6 Load Break Switch for Substation Secondary Side Protection, 12-36kV

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SF6 Load Break Switch for Substation Secondary Side Protection, 12-36kV photo-4

SF6 Load Break Switch for Substation Secondary Side Protection, 12-36kV photo-5

Product Spotlights

Designed for 12-36kV substation secondary protection, this SF6 Load Break Switch features sealed, maintenance-free SF6 gas insulation for reliable load current interruption. It offers compact design, long mechanical life, enhanced safety with interlocks, and optional motorization. Suitable for utilities and industries seeking durable, space-efficient switching solutions in diverse environments.

US$ 520 ≥10 Units

Key Specifications

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Rated Voltage:

12kV, 24kV, 36kV

Rated Current:

630A, 1250A, 2000A (customizable)

Breaking Capacity:

Rated short-circuit breaking current available

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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
Company Profile
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Rated Voltage 12kV, 24kV, 36kV

Rated Current 630A, 1250A, 2000A (customizable)

Breaking Capacity Rated short-circuit breaking current available

Insulation Medium SF6 (Sulfur Hexafluoride) gas

Operating Mechanism Spring-operated mechanism

Installation Type Indoor/Outdoor, Pole-mounted, Pad-mounted

Application Secondary side protection of distribution substations

Interlocking Feature Mechanical and/or electrical interlocking available

Enclosure Material Stainless steel or powder-coated steel

Standards Compliance IEC, ANSI, GB standards (specify upon request)

As a specialized manufacturer with over a decade of experience in electrical equipment, Jinhua Dika Electrical Equipment Co., Ltd. is proud to present our advanced SF6 Load Break Switch, engineered specifically for robust protection on the secondary side of 12-36kV substations. Designed for reliability in demanding grid applications, this switch incorporates proven SF6 insulation technology to ensure safe interruption of load currents and effective isolation of downstream circuits. Our commitment to quality, backed by a comprehensive ISO 9001 management system, ensures that every unit delivers consistent performance for utilities, industrial plants, and renewable energy installations worldwide.

Core Product Advantages & Technical Features:

Superior Arc-Quenching Performance: Utilizing SF6 gas as the insulation and arc-quenching medium, the switch provides excellent dielectric strength and thermal stability, enabling reliable interruption of load currents even under frequent operation cycles.
Compact & Maintenance-Free Design: The sealed tank design eliminates the need for regular maintenance of the interrupting chamber. This sealed system prevents moisture ingress and contamination, ensuring long-term operational stability.
Enhanced Safety & Operational Flexibility: Features include clear visible break indication, earthing switch options, and secure mechanical interlocks to prevent incorrect operation, safeguarding personnel and equipment.
Adaptable for Diverse Applications: Suitable for switching and isolating transformers, capacitor banks, feeder lines, and cable connections in substations, ring main units, and switching stations.

Detailed Technical Specifications:

Parameter	Specification	Remarks
Rated Voltage (Ur)	12 kV, 24 kV, 36 kV	Standard ratings
Rated Normal Current (Ir)	630 A, 1250 A, 2000 A	Other ratings customizable
Rated Short-Time Withstand Current (Ik)	20 kA / 3s, 25 kA / 3s	Depends on model
Rated Peak Withstand Current (Ip)	50 kA, 63 kA	Corresponding to Ik
Rated Breaking Current (Ibr)	Rated normal current (load breaking)	For making/breaking under load
SF6 Gas Pressure (at 20°C)	Typically 0.04 - 0.06 MPa (gauge)	Hermetically sealed
Operating Mechanism	Spring-stored energy, manual or motorized	Motorization is optional
Mechanical Life	≥ 10,000 operations	Main circuit

Benefits for Your Operations:

Reduced Total Cost of Ownership: The maintenance-free design and long electrical/mechanical life significantly lower lifecycle costs compared to air-insulated or oil-based switches.
Space Optimization: The compact footprint allows for efficient use of valuable substation real estate, facilitating easier integration into existing or new switchgear panels.
Improved Grid Reliability: Fast and reliable load breaking capability helps isolate faults swiftly, minimizing outage duration and improving overall system availability.
Environmental Resilience: The sealed construction provides excellent performance in polluted, coastal, or high-humidity environments where air insulation might degrade.

Trusted Manufacturing & Global Support:

Jinhua Dika operates with a firm commitment to international quality standards, including ISO 9001 for quality management and ISO 14000 for environmental management. Our products are trusted by clients across diverse markets, from North America and Western Europe to Southeast Asia and Africa, supported by an annual export value reflecting consistent global demand. With flexible shipment options from major Chinese ports like Shanghai, Tianjin, Guangzhou, and Ningbo, we ensure timely delivery to keep your projects on schedule. Choose our SF6 Load Break Switch for a reliable, safe, and efficient solution for your substation secondary protection needs. Contact us today for detailed technical consultation, competitive pricing, and customized configuration support.

Frequently Asked Questions (FAQ):

Q: What is the primary advantage of using SF6 gas in this load break switch?
A: SF6 gas offers superior dielectric strength and arc-quenching properties compared to air or oil. This allows for a more compact switch design, higher reliability, and minimal maintenance, as the gas is sealed in a lifetime tank.
Q: Can this switch be used for making and breaking fault currents?
A: No, this is a load break switch designed specifically for making and breaking rated load currents under normal conditions. It is not intended to interrupt short-circuit fault currents. For fault interruption, a circuit breaker is required.
Q: Is motorized operation available, and what are the control voltage options?
A: Yes, motorized operation is an available option for remote control. Common control voltages include 24VDC, 48VDC, 110VDC, 220VDC, and 110VAC/220VAC. The specific voltage can be customized upon request.
Q: How is the SF6 gas pressure monitored, and what happens if there is a leak?
A: The switch is equipped with a pressure gauge or a pressure switch for monitoring. The design is hermetically sealed for a maintenance-free life. In the unlikely event of a significant pressure drop below a safe threshold, the interlock system may prevent operation to ensure safety.
Q: What mounting configurations are supported?
A: The switch can be supplied for various mounting styles, including fixed mounting in metal-enclosed switchgear, pole-mounted configurations for overhead distribution, or as part of a pad-mounted ring main unit (RMU).
Q: Are earthing switches and safety interlocks included?
A: Earthing (grounding) switches are a common and recommended option for safe maintenance. Our switches feature robust mechanical interlocks between the load break switch and the earthing switch to prevent incorrect, unsafe sequences of operation.
Q: What international standards does this product comply with?
A: The switch is designed and tested in accordance with relevant IEC standards (e.g., IEC 62271-1, IEC 62271-102). It can also be manufactured to meet ANSI/IEEE or GB standards based on specific project requirements and customer specifications.
Q: What is the typical delivery lead time?
A: Lead time depends on the order quantity and specific configuration. For standard models, typical lead times range from 4 to 8 weeks ex-works. We recommend contacting our sales team with your project timeline for an accurate quotation and delivery schedule.