GuangDong Heng AnShun Electrical Power Equipment Service Co., Ltd.
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630A-1250A High Voltage Industrial Isolator Switch Group Disconnect Switches Easy Installation Used In Power System
Product Description:
High voltage isolator switch is a type of electrical switch used in power systems to disconnect a group of circuits from the rest of the system. It is typically used in low voltage distribution systems to isolate a group of circuits for maintenance or repair work.
High voltage isolator switch is designed to handle multiple circuits simultaneously, making them an efficient and convenient way to isolate a group of circuits. They are typically mounted on a support structure and consist of a set of stationary and movable contacts that are separated by an air gap. When the high voltage isolator switch is opened, the contacts are separated, interrupting the flow of current through the circuits and isolating them from the rest of the system.
It is also designed to operate safely and reliably in a variety of environmental conditions, and they are subject to rigorous testing and certification requirements to ensure their performance and safety. It is an important component of power system safety and reliability, allowing maintenance or repair work to be performed safely on a group of circuits without disrupting the rest of the system.
Application:
1.Isolation: When the isolator switch is in the open position, it creates a physical gap in the electrical circuit, which electrically isolates the section of the transmission line on either side of the switch. This prevents electrical energy from flowing through the line, which can help protect against damage to equipment downstream of the switch.
2.Surge protection: The isolator switch is often used in conjunction with surge arrestors, which are designed to protect against voltage surges caused by lightning strikes or other electrical disturbances. The combination of the isolator switch and surge arrestors helps protect against damage to equipment by diverting excess electrical energy away from the transmission line.
3.Maintenance safety: By providing a visible break in the transmission line, the isolator switch helps ensure that maintenance personnel can safely work on the line without risk of electrocution. This helps protect both the equipment and the people working on it.
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.
Safety Risks:
1Electrical shock: High voltage disconnect switches can deliver a potentially lethal electric shock if they are not handled properly. This can happen if the switch is not properly isolated before it is opened or if there is a fault in the equipment.
2Arc flash: When high voltage disconnect switches are opened, an arc flash can occur, which can release a significant amount of energy in the form of heat, light, and pressure. This can cause burns, eye damage, and other injuries.
3Equipment failure: High voltage disconnect switches can fail if they are not properly maintained or if they are overloaded. This can lead to equipment damage, electrical fires, and other hazards.
4Environmental hazards: High voltage disconnect switches are often located in outdoor environments, where they can be exposed to extreme weather conditions, such as high winds, heavy rain, and lightning strikes. These conditions can create additional safety risks for personnel who are operating or maintaining the 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 | ||||||||||||
