Environmental Protection Gas Insulated Switchgear Production Line Layout

Environmental Protection Gas Insulated Switchgear Production Line

The production process of an environmentally friendly inflatable cabinet, also known as gas-insulated switchgear, primarily includes the following steps: Precision welding of a gas chamber from 3.0mm thick stainless steel to ensure hermetic sealing, pre-installation of high-voltage components such as circuit breakers, assembly into a cabinet structure, fully automatic gas filling and leak testing to guarantee hermeticity, conducting power frequency withstand and lightning impulse tests to verify insulation performance, and finally, performing functional and performance inspections before leaving the factory to ensure the product meets environmental protection and safety standards.

Environmental protection gas-insulated switchgear, also known as an environmental protection inflatable cabinet, is a high-voltage switchgear that uses environmentally friendly gases such as dry air or nitrogen as the insulating medium, replacing the traditional SF6 gas. The structure, assembly, and testing process of the environmental protection inflatable cabinet are quite complex, involving precise engineering design and strict quality control. Here is a brief introduction to the structure, assembly, and testing process of the environmental protection inflatable cabinet:

Structural Design
-Gas Chamber Fabrication: The gas chamber is the core part of the inflatable cabinet, usually made from 3.0mm thick stainless-steel plates welded by high-precision robotic welding equipment to ensure good hermeticity.
-Insulating Medium: Since dry air or nitrogen is used as the insulating medium, its insulating performance is relatively weaker compared to SF6 gas. Therefore, it is necessary to improve the insulating performance through optimized structural design.
Assembly Process of environmental protection gas insulated switchgear production line
-Pre-installation of Components: Install switches, current transformers, operating mechanisms, and live indicators inside the gas chamber.
Cable Chamber Assembly: Divide the cable chamber using stainless steel side plates and partitions, and then assemble the cable chamber floor.
Fastener Installation: All fasteners are made of stainless steel to ensure stability and durability.
Testing Process
-Hermeticity Test: Use fully automatic inflation and leak detection equipment for vacuum inflation and leak detection to ensure the hermeticity of the gas chamber.
Power Frequency Withstand Test: Conduct the specified value of power frequency withstand test under zero-gauge pressure to verify the insulation level of the equipment.
-Lightning Impulse Test: Inspect whether the equipment insulation has the ability to withstand lightning impulse voltage.
-Partial Discharge Test: Detect internal discharge of insulating materials, surface discharge, and high-voltage electrode tip discharge to ensure that the maximum allowable partial discharge of the environmental protection cabinet complies with the standards.
Factory Inspection
-Functional Performance Check: Performed by professionals, including checking whether all components and fasteners are installed correctly and whether the inflatable cabinet has any functional defects.
-Repeatability of Operations Test: Repeat all operations more than 10 times to ensure the stability and reliability of the operations.
Withstand Voltage Test and Insulation Resistance Test: Finally, conduct a withstand voltage test and insulation resistance test to check whether the inflatable cabinet meets the relevant standards.

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