GuangDong Heng AnShun Electrical Power Equipment Service Co., Ltd.
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Electrical High Voltage Isolator Switch With Stable Performance overall safety With Outdoor Vacuum Circuit Breaker
Product Description:
An electrical high voltage isolator switch, also known as a high voltage disconnect switch or isolator, is a specialized switch used in high voltage power transmission and distribution systems. Its primary purpose is to provide a means of isolating specific sections of the electrical system for maintenance, repair, or safety purposes.
The high voltage isolator switch operates by physically opening or closing the electrical circuit. When the switch is closed, it allows the flow of electrical current, connecting the circuit to its power source. Conversely, when the switch is opened, it interrupts the flow of current, effectively disconnecting the circuit from its power source.
High voltage isolator switches are typically installed at strategic points in the electrical system, allowing for the isolation of specific sections or equipment for maintenance, repair, or safety purposes. They are often used in conjunction with other protective devices, such as circuit breakers and fuses, to ensure the overall safety and reliability of the high voltage power system.
Feature:
1.Construction: High voltage isolator switches are designed to handle the high voltage levels typically found in transmission and distribution systems. They are built with robust and durable materials to withstand the electrical stresses and environmental conditions of outdoor installations.
2.Insulation: Isolator switches are equipped with appropriate insulation materials to ensure safe operation at high voltage levels. The switch's contacts and other components are designed to provide sufficient electrical insulation to prevent arcing or flashovers during opening or closing operations.
3.Visible Indication: High voltage isolator switches often incorporate visible indicators to provide a clear indication of their status. This allows operators to visually confirm whether the switch is in the open or closed position, ensuring proper isolation and safety measures.
4.Manual Operation: Isolator switches are typically operated manually using a rotating handle or lever mechanism. The operator physically turns the handle or lever to open or close the switch, enabling control over the circuit's connectivity.
5.Safety Interlocks: In some cases, high voltage isolator switches may be equipped with safety interlocks. These interlocks ensure that certain conditions are met before the switch can be operated, such as verifying that the circuit is de-energized or that proper safety procedures are followed.
6.Grounding: Isolator switches may have provisions for grounding the disconnected circuit. This helps to discharge any residual electrical energy and provides additional safety measures for maintenance personnel working on the system.
Operation:
1 Preparation: Before operating the switch, the circuit should be de-energized and properly grounded to prevent any electrical hazards. The switch should be inspected for any signs of damage or wear and tear.
2 Closing the switch: To close the switch, the operator manually or remotely moves the switch handle or control lever to the closed position. This connects the circuit to the power source, allowing current to flow through the circuit.
3 Opening the switch: To open the switch, the operator manually or remotely moves the switch handle or control lever to the open position. This disconnects the circuit from the power source, interrupting the flow of current.
4 Arc management: When the switch is opened, an electrical arc may occur between the contacts, which can be dangerous and cause damage to the switch. To manage the arc, the switch may be equipped with devices such as arc chutes or blowout coils.
5 Safety: Operators of high voltage disconnect switches must follow proper safety procedures to prevent electrical hazards. This may include wearing personal protective equipment, working in teams, and following lockout/tagout procedures.
Sructure:
1.Porcelain Insulator Body: The insulator body is the main component of the isolator, and is typically made of high-strength porcelain. It is designed to provide electrical insulation between the conductor and supporting structure, and is molded into the desired shape and size.
2.Metal End Fittings: The metal end fittings are attached to the insulator body and provide a means of connecting the isolator to the conductor and supporting structure. They are typically made of galvanized steel or other corrosion-resistant material, and may be designed with special features such as clevises or ball-and-socket joints for easy installation.
3.Sealing Compound: A sealing compound is used to seal the joint between the insulator body and metal end fittings, preventing moisture and contaminants from entering the interior of the isolator.
4.Hardware: Hardware such as bolts, nuts, and washers are used to secure the metal end fittings to the insulator body and supporting structure.
Fitting Caps: Fitting caps are used to protect the metal end fittings from corrosion and damage, and may be made of plastic or other materials.
5.Additional Features: Depending on the specific application, porcelain high voltage electrical isolators may be designed with additional features such as insulating barriers, arc chutes, and earth switches to improve their performance and safety.
Conditions:
1.The maximum altitude for installation should not exceed 1000m.
2.The ambient air temperature should not exceed +40'C, and in general areas, it should not fall below -30'C. In Paramos areas, it should not fall below -40'C.
3.The wind pressure should not exceed 700Pa, corresponding to a wind speed of 34m/s.
4.The isolator should be able to withstand earthquakes of up to 8 degrees in intensity.
5.The isolator should be installed in a location where there is no frequent violent vibration.
6.For ordinary type isolators, they should be kept away from gas, smoke, chemical deposition, salt-spray fog, dust, and other explosive and corrosive materials that can seriously affect the isolator's insulation and conduction capability.
7.Pollution-proof type isolators are suitable for use in severely filthy conduction areas, but they should not be installed in areas with any explosive or fire-causing materials.
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 | ||||||||||||
