GuangDong Heng AnShun Electrical Power Equipment Service Co., Ltd.
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24kV High Voltage Isolator Switch 700Pa For Electrical System Single Phase Outdoor AC Power Disconnect Switch
Product Description:
The high-voltage isolator switch, also known as a disconnect switch or an isolator switch, is an essential component in high-voltage power systems. It serves the purpose of disconnecting or isolating a specific section of an electrical circuit from its power source.
The primary function of the high-voltage isolator switch is to physically break the electrical circuit, creating a separation between the equipment and the power source. This disconnection and isolation allow maintenance personnel to work safely on the equipment without the risk of electric shock.
Unlike a vacuum circuit breaker, the high-voltage isolator switch does not provide arc-quenching capabilities. It is not designed to interrupt or extinguish electrical arcs that may occur during circuit switching or fault conditions.
In high-voltage power systems, the high-voltage isolator switch is often coordinated with a vacuum circuit breaker. The circuit breaker is responsible for detecting faults and tripping to interrupt the current flow, while the disconnect isolator is operated to physically isolate the circuit and visually indicate the disconnection.
The high-voltage isolator switch plays a critical role in ensuring the safety of maintenance personnel. Before any maintenance work is performed on electrical equipment, the disconnect isolator is operated to open the circuit and create a visible air gap. This action confirms that the equipment is de-energized and safe for maintenance activities.
Application:
1.Circuit isolation: High voltage electrical isolators are primarily used to isolate sections of a power system for maintenance or repair work. This allows workers to work safely on the isolated circuit without the risk of electrocution or other electrical hazards.
2.Safety: High voltage electrical isolators are also used as a safety device to protect workers and the public from electrical hazards. By isolating a circuit, High voltage electrical isolators prevent accidental contact with live parts of the system and reduce the risk of electrical accidents.
3.Fault protection: High voltage electrical isolators can also be used to protect the power system from faults, such as short circuits and overloads. By isolating a faulty section of the system, High voltage electrical isolators prevent the fault from spreading to other parts of the system and causing further damage.
4.Switching: High voltage electrical isolators can be used as a switching device to control the flow of power in a system. By opening or closing the isolator, the flow of power can be directed to different parts of the system as needed.
5.Testing: High voltage electrical isolators can also be used for testing purposes, such as to measure the voltage or current in a circuit, or to test the performance of other components in the system.
Feature:
1.High voltage and current handling capacity: high voltage disconnect switches are designed to handle high voltages and currents commonly found in high voltage power systems, and are typically rated for 69 kV and above.
2.Stationary and movable contacts: high voltage disconnect switches have a set of stationary and movable contacts that are separated by an air gap. When the switch is closed, the contacts are in contact with each other, allowing current to flow through the circuit. When the switch is opened, the contacts are separated, interrupting the flow of current through the circuit.
3.Manual or motorized operation: high voltage disconnect switches can be manually operated or motorized, depending on the specific application and requirements. Motorized switches allow for remote operation, which can improve safety and convenience.
4.Outdoor construction: high voltage disconnect switches are designed for outdoor use and are typically constructed of durable materials such as steel or aluminum. They are built to withstand harsh environmental conditions, such as extreme temperatures, wind, rain, and dust.
5.Visual indicators: high voltage disconnect switches often have visual indicators to show the status of the switch, such as open or closed. This allows operators to quickly and easily determine the status of the switch.
6.Safety features: high voltage disconnect switches are designed with safety features to protect workers and the public from electrical hazards, such as accidental contact with live parts of the system. These features may include safety interlocks, grounding provisions, and warning labels.
Safety Risks:
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.
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 | ||||||||||||
