Switches

Your Leading Switches 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 switches. The company's Switches include 33kV Air Break Switch, 11kV Air Break Switch, 33kv Load Break Switch, 11kv Load Break Switch, 33kv Auto Recloser, Air Break Switch, etc. The primary purpose of a load break switch is to provide a means for isolating circuits or disconnecting electrical equipment from the power supply. If you are interested, please contact us, send email to info@dkline.net and 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.

Classification of Switches

Air Break Switch

An air break switch is a high-voltage switch. Its contacts open in the air. The air acts as a dielectric to quench any electrical arc that forms when the switch operates. Arc extinction occurs by the natural movement of air, or in some designs, compressed air. This ensures that the switch operates safely, without damaging its components.

Load Break Switch

Load break switches (LBS) are electrical devices used to interrupt or isolate a circuit under load conditions. They are commonly found in medium-voltage and high-voltage electrical distribution systems and play a critical role in the safe operation and maintenance of power networks, LBS are essential components in power distribution systems, providing the means to safely disconnect and isolate sections of the network for maintenance and troubleshooting.

Auto Reclosurer

Auto reclosing, a pivotal mechanism in modern electrical engineering, refers to the automatic closure of a circuit breaker after it has been opened due to a fault. This process is key in maintaining the continuity of electrical supply and minimizing service interruptions. The device responsible for this task is known as an auto recloser or automatic circuit recloser.

Technical Parameters of Switches

Item			Unit	Parameter
Nominal voltage			kV	10		15
Maximum working voltage			kV	12		17.5
Rated insulation level	1 min Power-frequency withstand voltage (effective value)	Over the ground	kV	42		55
		Fracture	kV	48		65
	Lightning impulse withstand voltage (peak)	Over the ground	kV	75		105
		Fracture	kV	85		120
Rating evaluation rate			Hz	50
Rated current			A	200	400	630	1250
Rated short-time withstand current for 4 seconds			kA	6.3	12.5	20	31.5
Rated peak withstand current			kA	16	31.5	50	80
Creep distance			mm	300		380
Mechanical life			Next	2000		2000

Functions of Switches

The consistency of these switches is much high.

These switches operate manually and also automatically based on the necessity.

It requires less maintenance and is also cheap.

These are capable of switching & fast breaker operations.

These types of break switches do not cause explosion & fire hazards.

This switch does not need a compressor.

By using these switches, the stability of the operation can be maintained.

Installation Requirements of Switches

The blade of the load switch should be aligned with the fixed contact and make good contact;

The blades of each phase of the 10kV high-voltage load switch should be in contact with the fixed contacts at the same time, and the difference between the front and rear should not be greater than 3 mm;

The pulling distance of the load switch on the outdoor high-voltage column should be greater than 175 mm; the pulling distance of the indoor compressed air load switch should be 182+3 mm;

The fixed contact of the load switch is generally connected to the power supply side. When installed vertically, the fixed contacts are on the upper side;

The transmission parts of the load switch should be free of cracks and damage, the action should be flexible, and the tie rod should be equipped with a protective ring (sleeve);

The transmission parts such as the extension shaft, bearing, coupling and crank of the load switch should have sufficient mechanical strength, and the pin of the connecting rod shaft should not be welded dead;

The connection between the load switch installed on the wall and the incoming cable should go through the busbar.

Usage of Switches

Residential installations

They protect household circuits, including lighting, outlets, and appliances, ensuring safety for occupants.

Commercial buildings

Offices, shops, and other commercial spaces use switches to protect essential systems such as hvac units and computer networks.

Industrial facilities

Factories and plants rely on switches to safeguard heavy machinery and complex electrical systems, minimizing costly downtime.

Renewable energy systems

Solar and wind energy installations use switches to protect inverters and other components from overloads and short circuits.

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.

After-Sales Service

Give a clear answer to the user's complaints within 24 hours.

If necessary, we send technicists to the user's site to solve the problem timely.

Return visit at regular intervals.

Establishing the user's record.

Long warranty period, and whole life service and support.

Providing the latest industrial information.

FAQ

Q: What is the function of load switches?

A: Within portable electronic devices themselves, load switches can be used to prevent damage from electrical surges, incorrect battery insertion, and other damaging events that can enter through the power source.

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: Should a switch break positive or negative?

A: In a completely isolated circuit, it makes no difference where the switch is placed. If the circuit is broken, current will not flow and the motor will not turn. Positive and negative make no difference here (as you can easily understand by considering an AC circuit).

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 are the applications of load break switches?

A: Load break switches have diverse applications across various sectors of electrical distribution, including distribution networks, substations, overhead lines, industrial facilities, commercial buildings, emergency power systems, railway electrification, and renewable energy systems.

Q: What is the preventive maintenance of load break switches?

A: · Contacts: Inspect for signs of corrosion or pitting.
· Insulators: Look for any cracks or discoloration.
· Operating Mechanism: Ensure there are no signs of mechanical wear, misalignment, or damage.
· Enclosure: Check for signs of moisture ingress or dust buildup.

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

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