Overload High Voltage Isolator Switch Hookstick Disconnect Switch Electrical Operatd Industrial Substation Used
Product Description:
High voltage isolator switches are typically used in high voltage transmission and distribution systems to isolate sections of the network for maintenance or repair work. They are also used as a safety device to protect workers from electrical hazards, such as accidental contact with live parts of the system.
They are designed to handle high voltages and currents, and they are often installed in outdoor locations, where they are exposed to harsh environmental conditions, such as extreme temperatures, wind, rain, and dust. Therefore, they are built to withstand these conditions and are often made of durable materials such as steel or aluminum.
High voltage isolator switches come in different types and configurations, depending on the specific application and requirements. For example, some isolator switches are designed for indoor use, while others are suitable for outdoor use. Some are designed to operate manually, while others are automated and can be operated remotely.
In addition to their primary function of isolating circuits, isolator switches also have other important features, such as providing a visual indication of their status (open or closed), and ensuring that the circuit is not energized when the isolator is open.
Application
1.Power Grids: The overhead high voltage vertical isolator switch is a critical component in power grids, where it is used to isolate sections of the transmission line for maintenance or repair. This helps ensure that the power grid remains operational and reliable, even during maintenance or repair activities.
2.Electrical Substations: The overhead high voltage vertical isolator switch is also commonly used in electrical substations, where it is used to isolate individual transformers or other equipment for maintenance or repair. This helps ensure that the substation remains operational and reliable, even during maintenance or repair activities.
3.Renewable Energy Systems: The overhead high voltage vertical isolator switch is also used in renewable energy systems, such as wind and solar power plants, to isolate sections of the transmission line for maintenance or repair. This helps ensure that the renewable energy system remains operational and reliable, even during maintenance or repair activities.
Operation:
High voltage isolator switch separates the conductive part from the base using an insulator to ensure a normal working insulation distance and fix the conductive part, insulator, and base as an integral switching device. When it is in the open position, there is a visible gap and a proper breaking insulation distance to withstand the normal working voltage. When it is in the closed position, it can reliably carry the normal working current and short-circuit fault current. Due to the presence of a dedicated arc extinguishing device, it can only be used for switching circuits with voltage but no load. The opening and closing operations are carried out by using an insulating hook to pull or push the round hole in the interlock, causing the dynamic interlock hook to disengage and engage with the static interlock hook.
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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