GuangDong Heng AnShun Electrical Power Equipment Service Co., Ltd.
Strive to establish leadership in China's electric power equipment industry.
Add to Cart
Ceramic High Voltage Disconnector Switch Easy Installation 630A 12kV Electrical Isolator Switch For Power System
Product Description:
A high voltage disconnect switch is an electrical switch that is designed to isolate a section of an electrical network or system from the rest of the system for maintenance or repair purposes. It is typically used in high voltage power transmission and distribution systems.
The switch is designed to open and close under normal or abnormal conditions, such as a fault or overcurrent. When the switch is open, it physically disconnects the section of the system from the rest of the network, preventing the flow of electricity to that section.
High voltage disconnect switches are typically designed to operate at voltages between 600 volts and 765,000 volts, and they can be operated manually or automatically. They are typically installed in substations or on power poles, and they are an important component of the electrical grid infrastructure.
It is important to follow proper safety procedures when working with high voltage disconnect switches, as they can be dangerous if not handled correctly. Only qualified and trained personnel should be allowed to operate and maintain high voltage equipment.
Feature:
1.High Voltage Rating: High voltage isolator switches are designed to withstand high levels of voltage, typically ranging from several thousand volts to several hundred thousand volts.
2.Robust Construction: High voltage isolator switches are typically made of materials that are highly resistant to electrical arcing, corrosion, and other forms of damage, such as porcelain or polymer.
3.Arc Chutes: Many high voltage isolator switches are designed with arc chutes, which help to dissipate the heat generated by electrical arcing and prevent damage to the switch.
4.Earth Switch: Some high voltage isolator switches are equipped with an earth switch, which provides an additional level of safety by grounding the isolated section of the circuit.
5.Interlocking Mechanism: To prevent accidental closure of the switch while maintenance work is being carried out, many high voltage isolator switches are equipped with an interlocking mechanism that prevents the switch from being closed until all safety procedures have been followed.
6. Visual Indicators: High voltage isolator switches may also include visual indicators, such as lights or flags, that provide a clear indication of whether the switch is in the open or closed position.
Operation:
1.When the HV electrical isolator is in the closed position, the contacts of the isolator are in contact with each other, allowing current to flow through the circuit. Thet HV electrical isolator is closed by manually or remotely operating the isolator, depending on the type of the HV electrical isolator.
2.To isolate a section of the power system, the HV electrical isolator must be opened. This is typically done by manually or remotely operating the isolator to separate the contacts and interrupt the flow of current through the circuit.
3.Once the HV electrical isolator is opened, the section of the power system that is connected to the isolator is isolated from the rest of the system. This allows maintenance or repair work to be performed safely on the isolated circuit.
4. When the maintenance or repair work is complete, the HV electrical isolator can be closed to restore power to the isolated circuit. This is done by manually or remotely operating the isolator to connect the contacts and restore the flow of current through the circuit.
Safety Risk:
Circuit Isolation: High voltage isolator switches are used to isolate a section of a high voltage circuit for maintenance, repair, or testing purposes. By opening the switch, the section can be effectively disconnected from the rest of the system, allowing work to be carried out safely.
Load Switching: High voltage isolator switches can be used as load switches to control the flow of electrical power in a circuit. They are particularly useful in situations where the load is relatively small and does not require a circuit breaker or fuse.
Overhead Line Protection: High voltage isolator switches are often installed on overhead power lines to provide protection against lightning strikes and other electrical disturbances. By isolating a section of the line, the switch can help prevent damage to equipment and reduce the risk of power outages.
Transformer Protection: High voltage isolator switches are also used to protect transformers by isolating them from the electrical network in the event of a fault or overload. By opening the switch, the transformer can be disconnected from the network, preventing damage to the transformer and other equipment.
Safety Tips:
1.Always wear appropriate personal protective equipment (PPE) such as gloves, safety glasses, and flame-resistant clothing.
Before working on the switch, ensure that the power supply is turned off, and the switch is properly grounded.
2.Follow the manufacturer's instructions for operating the switch, and do not attempt to bypass safety features or use the switch for purposes other than its intended use.
3.When working on the switch, use insulated tools and equipment to prevent electric shock.
4.Avoid touching any conductive parts of the switch and keep a safe distance from the switch when it is in operation.
5.Never attempt to repair or modify the switch yourself unless you are a qualified and trained professional.
6.Keep the area around the switch clean and free of debris that may interfere with its operation.
7.Regularly inspect the switch for signs of wear or damage, and replace any damaged or worn parts as soon as possible.
8.Only authorized personnel should be allowed to operate or perform maintenance on the switch.
9.In case of an emergency, follow established emergency procedures and shut off power to the switch immediately.
Condition:
1.The maximum altitude in the specified area does not exceed 1000 meters above sea level. This altitude limitation is relevant for the installation and operation of the equipment.
2.The ambient air temperature has certain limits. The maximum temperature should not exceed +40°C, and the minimum temperature can vary depending on the specific area. In general areas, the minimum temperature should not drop below -30°C, while in Paramos areas, it should not drop below -40°C.
3.The wind pressure should not exceed 700 Pascal (Pa), which corresponds to a wind speed of approximately 34 meters per second. This limit ensures that the equipment can withstand the force exerted by the wind without compromising its functionality or structural integrity.
4.The earthquake intensity should not exceed 8 degrees. This refers to the maximum intensity of seismic activity that the equipment can withstand without being damaged. The specific scale used to measure earthquake intensity may depend on the region or country.
5.The working environment should be free from frequent violent vibrations. This requirement ensures that the equipment remains stable and operational under normal operating conditions. Excessive vibrations can affect the performance and lifespan of the isolator.
6.Ordinary-type isolators should be installed in locations that are kept away from gas, smoke, chemical deposition, salt-spray fog, dust, and other explosive or corrosive substances. These materials can have detrimental effects on the insulation and conduction capabilities of the isolator, potentially compromising its performance and safety.
7.Pollution-proof type isolators are designed for use in areas with severe contamination. However, even in such areas, there should be no presence of explosive substances or materials that can cause fire. This requirement ensures that the isolator remains safe and functional despite the challenging environmental conditions.
Technical Parameters:
| Serial No. | Parameter | Unit | Data | |||||||||
| 1 | Rated Voltage | kV | 12 | |||||||||
| 2 | Rated Current | Model No. | (H)GW9-12(W)/630-20 | A | 630 | |||||||
| (H)GW9-12(W)/1000-20 | 1000 | |||||||||||
| (H)GW9-12(W)/1250-31.5 | 1250 | |||||||||||
| 3 | 4s Short-time withstanding current | Model No. | (H)GW9-12(W)/630-20 | kA | 50 | |||||||
| (H)GW9-12(W)/1000-20 | 50 | |||||||||||
| (H)GW9-12(W)/1250-31.5 | 80 | |||||||||||
| 4 | Rated Insulation Level | Lightning surge withstand voltage(peak) | Polar-to-Earth (Positive & Negative) | kV | 75 | |||||||
| Interfracture (Positive & Negative) | 85 | |||||||||||
| Industrial frequency withstand voltage (1 min) (Effective value) | Dry Test/Wet Test | Polar-to-Earth | 42(Dry) 34(Wet) | |||||||||
| Interfracture | 48(Dry) | |||||||||||
| 48(Dry) | ||||||||||||
| 48(Dry) 40(Wet) | ||||||||||||
| 5 | Main Circuit Resistance | μ Ω | 630 | |||||||||
| 1000 | ||||||||||||
| 1250 | ||||||||||||
| 6 | Mechanical Life Time | times | 50 | |||||||||
| 50 | ||||||||||||
| 80 | ||||||||||||
