Electrical S&C Loadbuster Disconnect Switch Porcelain High Voltage Disconnect Switch Applied To Renewable Energy System
Product Description:
High voltage disconnect switch is a type of electrical switch used to isolate a section of an overhead power transmission line for maintenance or repair. It is typically used in high voltage electrical systems, such as those used by power utilities to transmit electricity over long distances.
The switch is mounted on an overhead structure, such as a transmission tower or pole, and is designed to withstand the harsh environmental conditions encountered in outdoor electrical systems. It features a vertical, or up-and-down, motion to engage or disengage the switch contacts, which are typically made of copper or other conductive materials.
The disconnect switch is designed to provide a visible break in the transmission line, allowing maintenance personnel to safely work on the line without risk of electrocution or damage to equipment. It is often used in conjunction with other safety devices, such as grounding switches and surge arrestors, to protect the electrical system and the people working on it.
Overall, the high voltage disconnect switch is an important component of modern power transmission systems, ensuring reliable and safe operation of the electrical grid.
Feature:
1.Switchgear Integration: High voltage isolator switches are commonly integrated into switchgear systems, which include other protective devices such as circuit breakers, fuses, and relays. This integration allows for comprehensive control and protection of the high voltage circuit, ensuring safe and efficient operation.
2.Remote Operation: Many high voltage isolator switches are equipped with remote operation capabilities, allowing them to be controlled from a centralized location. This feature enhances convenience and safety by eliminating the need for manual operation in potentially hazardous environments.
3.Arc Suppression: High voltage isolator switches are designed to suppress the formation and propagation of electrical arcs when opening or closing the switch. Arc suppression techniques, such as using arc chutes or arc extinguishing chambers, help minimize the risk of damage to the switch and surrounding equipment, as well as reduce the potential for electrical accidents.
4.Fault Detection: Some high voltage isolator switches are equipped with fault detection mechanisms that can sense abnormal conditions, such as excessive current or voltage, and trigger an automatic switch opening. This capability enhances the overall protection of the circuit by rapidly isolating the faulty section and preventing further damage.
5.Modularity and Scalability: High voltage isolator switches are often designed to be modular, allowing for easy installation, replacement, or expansion in the electrical system. This modularity enables flexibility and scalability, making it convenient to adapt the system to changing operational requirements.
Safety Risk:
1.Electrical 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.
2.Arc 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.
3.Equipment 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.
4.Environmental 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.
P.S.
To minimize the risks associated with high voltage disconnect switches, it is important to follow proper safety procedures, including using appropriate personal protective equipment, following lockout and tagout procedures, and ensuring that only qualified and trained personnel are allowed to operate and maintain the equipment. Regular maintenance and testing of the equipment can also help to reduce the risk of equipment failure and other hazards.
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.
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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