Load Break Switch
Your Leading Load Break Switch Supplier
Trust In Grid Co., Ltd. is a professional transformer manufacturer, specializing in the design and production of power transformer, high-voltage switchgear, power distribution equipment, energy storage systems (ESS), magnetic wire, bushing and machining parts. Our power transformers are available in 500KV, 330KV, 220KV, and 110KV models, and are widely used in power utilities, renewable energy systems (solar and wind), industrial facilities, data centers, transportation infrastructure, and OEM applications.
Why Choose Us?
Production Capacity
With 6 factories covering 240,000 m², over 2,000 employees, and 200+ engineers, we support large-scale projects and long-term global supply with more than 30 years of export experience.
Advanced Equipment
We operate a complete set of in-house production equipment, including cutting, winding, CNC machining, vacuum drying, and testing systems, with over 450 machines ensuring stable quality and efficient output.
Quality Control
All products are manufactured and tested in compliance with IEC, IEEE, ANSI, CSA, UL/cUL, CE, and ISO 9001:2015 standards, ensuring reliable performance and smooth international approval.
OEM & ODM Capability
Our engineering team provides OEM/ODM support, including customized design and technical optimization, delivering tailored solutions for utility, industrial, and renewable energy projects.
Technical Specifications of Load Break Switch
|
S.Q. |
Item |
Unit |
Parameter |
||||
|
1 |
Rated Voltage |
KV |
12 |
24 |
40.5 |
||
|
2 |
Rated Frequency |
Hz |
50/60 |
50/60 |
50/60 |
||
|
3 |
Rated Insulation Level (at filled SF6 gas pressure 0.07 MPa / 20°C) |
Lightning Impulse Withstand Voltage |
Between phases, Phase-to-earth |
KV |
75 |
125 |
185 |
|
Interrupter unit gap |
85 |
145 |
215 |
||||
|
Power Frequency Withstand Voltage (1 min) |
Between phases, Phase-to-earth |
42 |
64 |
95 |
|||
|
Interrupter unit gap |
50 |
79 |
110 |
||||
|
4 |
Insulation Level at Zero Gauge Pressure |
Power Frequency Withstand Voltage (1 min) |
KV |
30 |
|||
|
Power Frequency Withstand Voltage (1 min) Reverse Polarity |
30 |
||||||
|
Highest Phase Voltage (5 min) Between Phases and Phase-to-earth |
9 |
||||||
|
5 |
Rated Current |
A |
630 |
630 |
630 |
||
|
6 |
Rated Load Breaking Current (at 0.07 MPa / 20°C) |
A |
630 |
630 |
630 |
||
Cheaper As Compared To 2 Pole Structure
Regardless of the technology used in a load break switch, its installation and acquisition cost is far lower than a 2-pole structure. However, its price depends on the power source, IP rating, voltage/power, frequency, and current rating. The LBS' s convenient use and reasonable prices make it widely used in distribution network systems of about 10kV.
Safer
A load break switch is mainly used to close and break the load current and can be used with a high-voltage fuse instead of a circuit breaker. The reasonable selection of load balancing switch in the design dramatically helps ensure safety and reliability. As a result, the dangers associated with tripping circuit breakers are eliminated, providing a safer power grid operation.
Provided With Fuse Protection
Load break switches also feature HRC fuses for transformer protection, ensuring more safety and reliable operation. However, you also can use a vacuum circuit breaker, although it is a bit costlier and more reliable.
In addition, the transmission lines are protected from overheating, leading to fires, while the appliances like transformers are protected from the damages that might be caused by short-circuiting or catching fires.
Turning The Power Supply On & Off Is Easy
Load break switches usually feature a spring mechanism for switching the power supply on or off. This makes the process of turning the power supply on or off easier.
Applications of a Load Break Switch
To begin with, a load break switch (LBS) manages equipment in medium voltage electrical systems, usually ranging from 11kV to 33kV. You know it has a small size, but it performs amazing functions in assuring the continual and secure delivery of power. Let' s talk about some core purposes of a load-reaction switch.
Safe Control Of Power Flow
As we already discussed, one of the most important objectives of a load break switch is to manage the flow of electric current. It lets power be switched on or off at one part of the whole system. So, this helps maintain smooth operational flow while providing control over selected sub-systems or areas of the power line.
Easy and Safe Isolation
Well, another major function is isolation. Yes, if there is any fault in any part of the system, it will disconnect the power to that particular section. Therefore, it enhances the safety of workers as the power has been cut off. Moreover, this enhances safety against electric shocks or accidents.
Helps During Maintenance
During upgrades or during regular maintenance, the load break switches help in isolating the section of the circuit. As a result, a safe environment is created for workers. Moreover, it is easy to operate the switch as it does not require any special tools.
Useful in Emergency Situations
Unlike other load break switches, these can now be operated remotely. Such a feature is more helpful in emergencies or bad weather. However, Operators can remove power from a safe distance efficiently, which prevents them from any harm.
Keeps the System Stable
Moreover, the use of these LBS devices helps prevent drastic changes in power flow. This avoids damage to electrical equipment and makes sure the network stays running properly.
Ordering Process
Send Us Inquiry → Receive Our Quotation → Negotiate Details → Confirm the Sample → Sign Contract/Deposit → Mass Production →Cargo Ready → Balance/Delivery → Further Cooperation
Customization Options
Material: Customizable
Logo: Customizable
Structure: Customizable
MOQ: Customizable
The Difference Between a Load Break Switch and an Isolating Switch
|
Feature |
Load Break Switch (LBS) |
Disconnect Switch (Isolator) |
|
Functionality |
Makes and breaks current under normal load |
Isolates a circuit, creating a visible air gap |
|
Interrupting Capability |
Yes, can safely interrupt load current |
No, must not be operated under load |
|
Arc Extinguishing |
Equipped with arc quenching mechanisms (e.g., SF6, vacuum) |
No arc extinguishing capability |
|
Contact Design |
Robust, designed for arc withstand and quenching |
Simpler, designed for secure open circuit |
|
Operating Mechanism |
Often quick-break for rapid interruption |
Slower, deliberate operation for isolation |
|
Primary Application |
Switching under load, sectionalizing networks |
Providing safe isolation for maintenance and lockout/tagout |
Payment Terms
T.T with 30% downpayment, 70%before shipment.
Paypal or West Union also accept.
Our Service Highlights
Pre-Sales Consultation & Design Support
Early technical engagement to define requirements and deliver optimized solutions.
During Sales & Project Execution
Transparent project management with controlled production, quality tracking, and on-time delivery.
Warranty Advantage
Minimum 2-year warranty on all products, ensuring reliable and risk-free operation.
After-Sales Support
24/7 technical support with fast response, spare parts availability, and training services.
Long-Term Partnership
Lifelong technical support and upgrade guidance for sustained performance.
Packaging & Shipping
Packaging details:
Shockproof foam/moisture-proof film, professional export cartons/wooden crates/pallets.
Final assembly ensures mechanical integrity and readiness for transportation and installation.
Certificates
We're well-known as one of the leading load break switch manufacturers and suppliers in China, also support customized service. Please feel free to buy high quality load break switch made in China here from our factory. Contact us for more details.
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