High Voltage AC Hook Stick Disconnect Switch For Substation Electrical Isolator Grey Vertical Operated Disconnect Switch
Product Description:
High Voltage Electrical Isolator 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.
Function:
The main function of a high voltage electrical isolator is to provide electrical insulation between the high voltage AC conductor and the supporting structure, and to support the weight of the conductor. It is designed to withstand high levels of voltage and electrical current, and is typically made of materials that are highly resistant to electrical arcing and corrosion, such as porcelain or polymer.
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.
Condition:
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 |
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High Voltage AC Hook Stick Disconnect Switch For Substation Electrical Isolator Grey Vertical Operated Disconnect Switch Images
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