New Model GW9 Series Outdoor Disconnector Switch Porcelain Isolator Used With High Voltage Vacuum Circuit Breaker
Product Description:
An outdoor disconnector switch 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.
Outdoor disconnector 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.
It is important to follow proper safety procedures when working with high voltage disconnect switches, as they can be dangerous if not handled correctly. Only qualified and trained personnel should be allowed to operate and maintain high voltage equipment.
Operation:
1.Interoperability: High voltage disconnect switches are designed to integrate with other components of the electrical system, such as circuit breakers, transformers, or protective relays. This interoperability allows for coordinated operation and protection of the entire system, ensuring reliable and efficient power distribution.
2.Remote monitoring and diagnostics: Some high voltage disconnect switches are equipped with remote monitoring and diagnostics capabilities. These systems enable real-time monitoring of switch parameters, such as temperature, pressure, and contact resistance, allowing for proactive maintenance and troubleshooting to prevent failures and optimize performance.
3.Emergency operation: High voltage disconnect switches may have provisions for emergency operation, such as manual overrides or emergency power supplies. These features ensure that the switch can be operated even in emergency situations, such as power outages or equipment failures, providing an additional layer of reliability and safety.
4.Compliance with standards: High voltage disconnect switches are designed and manufactured to meet industry standards and regulations, ensuring their safety and performance. Compliance with standards such as IEC, ANSI, or NEMA guarantees that the switch has undergone rigorous testing and meets the necessary requirements for operation in high voltage applications.
Safety Risks:
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.
Safety Tips:
1.Conduct routine testing and maintenance on the switch to ensure its proper functioning. This includes testing the switch's insulation resistance, verifying the operation of safety interlocks, and checking for any abnormal heating or vibrations.
2.Implement a lockout/tagout procedure before performing maintenance or repair work on the switch. This procedure involves locking and tagging the switch to prevent accidental energization while work is being carried out, providing an additional layer of safety.
3.Provide adequate training to personnel who will be operating or working on the switch. Training should cover proper handling, operation, and maintenance procedures, as well as the potential hazards associated with the switch.
4.Implement a comprehensive safety management system that includes regular safety audits, hazard assessments, and incident reporting. This proactive approach to safety helps identify and address potential risks before they result in accidents or injuries.
5.Ensure proper ventilation and cooling systems are in place for high voltage isolator switches located in enclosed or confined spaces. 6.Adequate ventilation helps dissipate heat and prevents the switch from overheating, which can lead to malfunctions or even fires.
Advantage:
1.Simple structure: The isolation switch is designed with a straightforward structure, making it easy to understand and operate.
Low maintenance: Due to its design and construction, the isolation switch requires minimal maintenance, reducing the need for frequent inspections and repairs.
2.High breaking and closing linearity: The isolation switch has excellent breaking and closing linearity, ensuring smooth and reliable operation during switching operations.
3.High reliability: The switch is built to provide dependable performance, minimizing the risk of malfunctions or failures during operation.
4.Comparable to international standards: The GW9-12(W) series isolation switch meets or exceeds the level of similar products both domestically and internationally, ensuring its compatibility and competitiveness in the market.
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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