Overview of High-voltage Isolation Switches

High voltage isolation switches are critical switching equipment used in electrical systems of power plants and substations. Its primary function is to guarantee the safety of high-voltage electrical appliances and equipment during maintenance work and to isolate voltage. It cannot be used to cut off, input, or disconnect load current and short-circuit current. It can only be used for certain switch operations that do not generate strong arcs—usually used in conjunction with high-voltage circuit breakers to isolate the power supply during maintenance, providing safety protection for maintenance personnel and equipment. According to the installation location and the number of insulation columns, they can be divided into indoor type, outdoor type, single-column, double-column, and three-column types. The electrical system of power plants and substations is crucial for guaranteeing the safety of maintenance personnel and equipment.

Characteristics of High-voltage Isolation Switches:

1. Safety guarantee during maintenance of high-voltage electrical appliances and devices: This is the primary function of high-voltage isolation switches, which can ensure the safety of equipment and operators during maintenance work.

2. Isolation voltage: It plays the role of isolating voltage and cannot be used to cut off or connect current, nor can it be used to break short-circuit current.

3. Nonarc extinguishing function: It cannot be used to cut off current; that is, it does not have an arc extinguishing function.

4. Multiple types: According to the installation location, it can be divided by indoor and outdoor types. According to the number of insulation pillars, they can be divided into single-column, double-column, and triple-column types. Each voltage level has optional equipment.

Application of High-voltage Isolation Switches

1. Equipment maintenance: In the maintenance work of power plants and substations, high-voltage isolation switches isolate the power supply, providing a clear disconnection point for maintenance personnel and equipment to ensure the safety of maintenance work.

(High voltage isolation switch for equipment maintenance)

2. Switching operation: High voltage isolation switches can be used for switching operations that do not generate strong arcs, such as opening and closing lightning arresters, reactors, and other switching operations that do not generate arcs.

(High voltage isolation switch for switch operation)

3. Cooperate with circuit breakers for operation: High-voltage isolation switches are often used with high-voltage circuit breakers for specific operations, such as non-energized operations.

(Cooperate operation of high-voltage isolation switch and circuit breaker)

4. Changing the operation mode of the power supply system: In some special power supply systems, high-voltage isolation switches can be used to change the operation mode of the power supply system.

(Cooperate operation of high-voltage isolation switch and circuit breaker)

Company Profile

PDDN Photoelectronic Technology Co., Ltd. (sales@pddn.com) is a high-tech enterprise specializing in manufacturing, developing, and selling electronic and power semiconductor devices. Since its establishment, the company has been committed to providing high-quality and high-performance electronic devices or semiconductor products to global customers to meet the needs of the constantly developing power electronics industry.

It accepts payment through credit card, T/T, Western Union remittance, and PayPal. PDDN will ship goods to overseas customers via FedEx, DHL, sea or air freight. If you are looking for high-quality, high-voltage isolation switches, please consult us; we will be here to assist you.

Payment Methods of High-voltage Isolation Switches

Letters of credit, wire transfers, Western Union transfers, PayPal, credit cards, etc.

Shipment of High-voltage Isolation Switches

According to customer requirements, sea freight, air freight, and express delivery.

Storage Conditions for the High-voltage Isolation Switches

1. Environmental requirements: High voltage isolation switches should be stored in a dry, ventilated, noncorrosive gas and nondirect sunlight environment. Meanwhile, avoid placing the equipment in high or low-temperature environments to prevent affecting its performance and lifespan.

2. Dust and moisture prevention: Equipment should be stored in a dust-free, dry place and kept clean. At the same time, equipment should avoid coming into contact with damp environments to prevent problems such as rust or decreased electrical performance.

3. Shock and collision prevention: During storage and transportation, the equipment should be protected from severe vibrations and impacts to prevent damage to its internal electrical components and mechanical structures.

4. Labels and numbering: Each high-voltage isolation switch equipment should be labeled, indicating its specifications, models, and other information. Meanwhile, the equipment should be numbered for easy management and tracking.

5. Safe sealing: During storage, equipment should be sealed with sealing strips to ensure that unauthorized personnel cannot access the electrical components inside the equipment, thereby ensuring the equipment's and personnel's safety.

6. Regular inspection and maintenance: Although the equipment does not need to be used during storage, regular visual inspections and simple maintenance should be carried out to ensure that it remains in good condition.

FAQ

Q1

What is the role of high-voltage isolation switches in power systems?

Re:High-voltage Isolation Switches are mainly used for transmitting and distributing electrical energy in the power system. They are widely used in urban underground power grids, power plant outgoing lines, internal power supply of industrial and mining enterprises, as well as underwater transmission lines crossing rivers and seawater. They are essential components of the power system.High voltage isolation switches are mainly used in power systems to isolate voltage and ensure the safety of personnel and equipment during equipment maintenance or repair.

Q2

What is the difference between high-voltage isolation switches and high-voltage circuit breakers?

Re:High-voltage isolation switches and high-voltage circuit breakers are both high-voltage switchgear, but their functions and usage scenarios are different. High voltage isolation switches are mainly used to isolate voltage. They cannot be used to cut off or connect current, while high voltage circuit breakers are used primarily to control and protect circuits and can cut off or connect current.

Q3

Why can't high-voltage isolation switches be used to cut off or connect current?

Re:High voltage isolation switches cannot be used to cut off or connect current, as their design is used primarily to isolate voltage, not to carry current. If a high-voltage isolation switch is used to cut off or connect the current, it may cause equipment damage or arc, leading to safety accidents.

Q4

Describe several types of high-voltage isolation switches.

Re:High voltage isolation switches can be classified into various types according to different classification standards. According to the position location, it can be divided into indoor and outdoor types. According to the number of insulation pillars, they can be divided into single-pillar, double-pillar, and three-pillar types. In addition, there are different types of isolation switches, such as medium and low voltage, high voltage, ultra-high voltage, and ultra-high voltage.

Q5

What are the safety operating procedures for high-voltage isolation switches?

Re:When using high-voltage isolation switches, it is necessary to follow specific safety operating procedures. First, ensure that operators have relevant operational qualifications and safety knowledge. Secondly, it is required to inspect and maintain the equipment before operation to ensure its regular operation. Thirdly, during operation, it is necessary to follow the prescribed procedures to avoid accidental operations. Finally, the site should be cleaned up promptly after operation to ensure the safety of equipment and personnel.