Load Break Switch

Your Leading Load Break Switch Supplier

Baoding Sihedan Electric Technology Co.,Ltd is located at Baoding city Hebei Province China. It is a high-tech enterprise specializing in the design and production of load break switch. A load break switch is designed to switch the power "on or off" or change the position when the transformer is energized (meaning it has a load on it)—the switch will break this load. A more formal definition of a load break switch is "a disconnect switch that has been designed to provide making or breaking of specified currents." Our load break switch includes 11kv load break switch, 33kv load break switch. If you are interested, please send email to info@dkline.net we will reply you in the first time.

Why Choose Us?

OEM & ODM Service

We especially have advantage on OEM and ODM of all electric Power fittings.

Advanced Facilities

We have specialized production workshops for machinery, forging, welding, stamping etc.

Global Market

Our Products are sold to USA, Malaysia, Bolivia, East Timor, England, Hong Kong, Camernoon, Kenya, Uganda etc.

Specifications of Load Break Switch

Load Break Switch 11kv	24KV
v. Power Frequency Withstand Voltage(r.m.s) -To earth and between poles	24KV
	50KV
-Across the isolating distance	60KV
vi. Average Ambient Temperature (Maximum)	28ºC (40ºC)

Functions of Load Break Switch

Isolation

Load break switches are primarily used to isolate sections of an electrical circuit from the power source. This isolation ensures that maintenance personnel can work safely on the circuit without the risk of electric shock or damage to equipment.

Load Breaking Capability

Load break switches are designed to interrupt the flow of electrical current under load conditions. They can handle varying loads, including moderate levels of fault currents, without causing damage to the switch or the circuit.

Manual or Motorized Operation

Load break switches can be operated manually using a handle or lever, or they can be motorized for remote operation, providing flexibility in different applications.

Visible Contacts

Load break switches often feature visible contacts, allowing operators to visually confirm whether the switch is open or closed.

Weatherproof and Insulated

Load break switches are typically designed to withstand harsh environmental conditions and are insulated to prevent electrical leakage.

Customizable Options

MOQ	There are no MOQ limit in first order, and 100pcs in further.
Material design and bulk supply	We are supplying for LV and MV EPC material in lot many years.
OEM	We are providing the anchor clamp as custom requirement.

Tests on Load Break Switch

Routine test: This is a test that is performed from time to time. It is conducted to determine the make and break capacity of the load break switch. This test is done to know the peak of Transient Recovery Voltage (TRV) withstand capability after the occurrence of current interruption.

Capacitive current switching test: When an unloaded transmission line, cable, or other equipment is suddenly opened, the interruption of capacitive currents creates high voltage spikes, putting stress on the switching device's insulating medium.
So, when a load break switch interrupts line charging capacitive current, a line charging current test duty will be performed to evaluate its interrupting capabilities, and cable charging current test will be performed to evaluate the breaking of cable charging current capability.

Closed loop switching test: Closed loop breaking capacity is when a circuit in which both sides of the switch remain energized after breaking. To evaluate this capacity, a closed loop switching test must be conducted.

Short-circuit test: Sometimes, the load break switch will close on an existing fault. During the transitory time following the commencement of current during a making operation, the optimum peak of the first major current loop of the current in a pole of a switch will be observed. The load break switch must be able to close without hesitation as soon as the contacts touch, and it must be able to endure the tremendous mechanical forces involved.
Short-circuit test must be performed on a switch that has undergone at least 10 make-break operating cycles at 100% predominantly active load.

Environmental Conditions Suitable for Load Break Switch

Short period peak value: 50°C

Average over a period of 24 hours: 40°C

Lower limit over 24 hours: -25°C

Relative humidity: 100%

Maximum altitude: 1,000 meter

Application Scope of Load Break Switch

Distribution Networks

Load break switches are commonly used in distribution networks to isolate sections of the grid for maintenance, repairs, or troubleshooting. They allow for the safe disconnection of power to specific areas without affecting the entire network.

Substations

Load break switches play a vital role in substations by providing isolation and sectionalization capabilities. They enable operators to isolate faulty equipment or sections of the substation while maintaining power flow to the rest of the system.

Overhead Lines

Load break switches are often installed on overhead power lines to provide sectionalizing points and enable the isolation of specific line segments. They facilitate efficient fault location and restoration of power by isolating the affected section without disrupting service to other areas.

Transformer Installations

Load break switches are used in transformer installations to isolate transformers from the rest of the electrical system for maintenance or replacement purposes. They ensure safe and controlled disconnection of transformers from the power supply.

Industrial Facilities

Load break switches are employed in industrial facilities to provide isolation and control of electrical circuits feeding various equipment and machinery. They enable maintenance personnel to work safely on electrical systems without risking electrical hazards.

Commercial Buildings

Load break switches are utilized in commercial buildings to isolate electrical circuits serving different areas or floors. They allow for localized maintenance or repairs without interrupting power supply to the entire building.

Emergency Power Systems

Load break switches are integrated into emergency power systems to provide manual or automatic transfer of power between utility and backup sources. They ensure seamless transition between power sources during emergencies or power outages.

Railway Electrification

Load break switches are used in railway electrification systems to isolate sections of the overhead catenary or third rail for maintenance or repair activities. They help maintain the reliability and safety of railway electrification infrastructure.

Renewable Energy Systems

Load break switches are integrated into renewable energy systems, such as solar and wind farms, to isolate power generation sources from the grid during maintenance or grid disturbances. They ensure safe operation and grid stability.

Transportation

productcate-521-253

Payment Terms

1:	We are accepting T/T and L/C payment terms. And FOB, CIF, CFR.
2:	Sample order: 100% payment before shipment.
3:	Bulk order: 50% deposit balance before shipment.

FAQ

Q: What is the advantage of a load break switch?

A: A load break switch is a protective device used in electrical installation to make and break load currents. It ensures that electrical equipment functions smoothly. It is very cheap, safe, acts as protection for transformers, and very easy to switch on and off.

Q: What is the rating of load break switch?

A: The AC high voltage load break switch is used in indoor or outdoor medium voltage systems at rated frequency 50/60 Hz. The load break switch is generally composed of disconnect blade, arc extinguishing chamber and operating mechanism.

Q: When to use load break switch?

A: 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.

Q: What is the difference between load break switch and VCB?

A: The load switch is mainly operated by manual operation, and the vacuum circuit breaker can be operated manually or electrically; 5. The load switch is used in places where frequent opening and closing operations are not required, and the vacuum circuit breaker can be used in places where frequent operation is required.

Q: What is the difference between a load break switch and a disconnect switch?

A: The load break switch makes, breaks, and carries currents. The disconnector acts as a safety measure; it isolates a part or the whole of a circuit and prevents current from flowing through; this is done to prevent hazards during inspection, maintenance, and repair.

Q: What is the difference between a recloser and a load break switch?

A: Reclosers are intelligent devices that automatically detect and restore power after momentary faults, enhancing system reliability. Load breaker switches provide a means of safely isolating specific loads for maintenance or repair work.

Q: What is the operating mechanism of load break switch?

A: The working mechanism of a load break switch involves both mechanical and electrical components. When the switch is operated, it separates the contacts, creating an arc between them. The switch is designed to control and extinguish this arc, typically using air, gas (like SF6), or a vacuum.

Q: What is the voltage range of a load break switch?

A: LBS type of vacuum load break switches has optional built-in voltage sensors. The model range includes products for 6/15, 22/27 and 33/40kV voltage classes. It is a very reliable and safe breaking element for electrical lines.

Q: What is the amp rating of load break switch?

A: The load break switch is intended for the general purpose switch on-load type, gang operated with an operating handle, the switch is capable of making ,carrying ,and breaking the rated normal current 400 amp for 11kv and 600 amp for 33kv ,the load breaking switch shall according to IEC 60265-1 & IEC 60129.

We're well-known as one of the leading load break switch manufacturers and suppliers in China. Welcome to buy high quality load break switch at low price from our factory. Contact us for more discount information.

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