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GuangDong Heng AnShun Electrical Power Equipment Service Co., Ltd. |
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GW9-10/630A High Voltage Outdoor Isolator Switch For Maintanence Single Phase Industrial Hookstick Operated 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.
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.
Application:
1.High voltage disconnect switches are essential components in power transmission and distribution systems, as they allow for the isolation of specific sections of the network for maintenance or repair work. They can also be used to isolate sections of the network in the event of a fault or other abnormal condition.
2.These switches are designed to handle high voltages and currents, and are typically constructed from durable and robust materials such as stainless steel, aluminum or copper. They are designed to withstand harsh environmental conditions, such as extreme temperatures, high winds, and heavy rainfall.
3.There are several types of high voltage disconnect switches, including air-break switches, oil-immersed switches, and gas-insulated switches. Air-break switches are the most common type, and they wor k by using a set of contacts that physically separate when the switch is opened. Oil-immersed switches are typically used in high voltage applications and are filled with oil to prevent arcing when the switch is opened. Gas-insulated switches use sulfur hexafluoride gas to insulate the switch contacts, which allows for smaller and more compact switch designs.
4.High voltage disconnect switches must be operated and maintained by qualified personnel who have received proper training. Safety procedures must be followed when working with these switches, including the use of appropriate personal protective equipment and following lockout/tagout procedures to prevent accidental energization of the equipment. Regular maintenance and testing of high voltage disconnect switches is also important to ensure that they are functioning properly and are safe to use.
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 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.
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 | ||||||||||||
