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[China]
Trade Verify
Contact name:Sherlin
GuangDong Heng AnShun Electrical Power Equipment Service Co., Ltd. |
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Portable High Voltage Isolator Switch 1250a Ceramic Made With Easy Operation Ac Power Vertical Break Switch
Product Description:
A high voltage isolator 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.
High voltage isolator 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.
Structure:
The product being described is composed of a base (plate), post
insulator, conductive part, and interlock device. The knife is
installed on the dynamic contact knife head through bolts and is
separately connected with the static contact head. Each side is
maintained in a good contact state by the pressure of the
compression spring. The knife is a slot-shaped type, which
increases the heat dissipation surface and reduces the temperature
rise. This contributes to the mechanical strength of the knife and
makes it dynamically thermally stable against short circuits.
The interlocking parts installed at the non-rotating end of the
contact knife and the static locking hook on the static contact
form the opening locking device. When the brake is closed, the
device is self-locking, so the brake knife will not fall off due to
its own weight or the action of electric power, which could cause
the brake to open without cause.
This product is commonly used in power transmission and
distribution systems and plays a crucial role in ensuring the
proper functioning of the electrical grid. Proper safety procedures
should be followed when working with these switches, and only
qualified and trained personnel should be allowed to operate and
maintain them.
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.
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.
Application:
High voltage isolator switches are essential components in power transmission and distribution systems, as they allow for the isolation of specific sections of the network for maintenance or repair work. They can also be used to isolate sections of the network in the event of a fault or other abnormal condition.
These switches are designed to handle high voltages and currents, and are typically constructed from durable and robust materials such as stainless steel, aluminum or copper. They are designed to withstand harsh environmental conditions, such as extreme temperatures, high winds, and heavy rainfall.
There are several types of high voltage disconnect switches, including air-break switches, oil-immersed switches, and gas-insulated switches. Air-break switches are the most common type, and they wor k by using a set of contacts that physically separate when the switch is opened. Oil-immersed switches are typically used in high voltage applications and are filled with oil to prevent arcing when the switch is opened. Gas-insulated switches use sulfur hexafluoride gas to insulate the switch contacts, which allows for smaller and more compact switch designs.
High voltage isolator switches must be operated and maintained by qualified personnel who have received proper training. Safety procedures must be followed when working with these switches, including the use of appropriate personal protective equipment and following lockout/tagout procedures to prevent accidental energization of the equipment. Regular maintenance and testing of high voltage disconnect switches is also important to ensure that they are functioning properly and are safe to use.
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 | ||||||||||||
