SF6 Gas Service Cart Purchase Guide: Analysis of Core Performance Indicators and Operational Requirements

SF6 Gas Service Cart Purchase Guide: Analysis of Core Performance Indicators and Operational Requirements

In the power industry and related fields, SF6 gas is widely used in high – voltage switchgear, gas – insulated metal – enclosed switchgear (GIS), etc., due to its excellent insulation and arc – extinguishing properties. As a key device for handling SF6 gas, the selection of an SF6 gas service cart is of great importance. The following details how to choose a suitable SF6 gas service cart.

‌1. Define Operational Requirements‌

First, you need to consider the expected usage scenarios and operational tasks of the SF6 gas service cart. If it is mainly used for daily equipment maintenance in substations, such as gas filling for SF6 circuit breakers and recovery of a small amount of gas, a small, lightweight SF6 gas service cart with basic recovery and gas – filling functions can meet the requirements. If it is involved in large – scale power engineering construction or large – scale maintenance of GIS equipment, and requires frequent recovery, purification, storage, and re – filling of a large amount of SF6 gas, a large – scale SF6 gas service cart with high recovery efficiency, a large – capacity storage tank, and an efficient purification system should be selected.

‌2. Pay Attention to Core Performance Indicators‌

‌Recovery and Gas – filling Efficiency‌: The recovery efficiency determines the speed of extracting SF6 gas from equipment, and the gas – filling efficiency concerns the speed of filling gas into equipment. An efficient SF6 gas service cart can significantly shorten the operation time and improve work efficiency.

‌Purification Capacity‌: SF6 gas used for a long time may contain moisture, impurities, decomposition products, etc., which can affect the performance of equipment. A high – quality SF6 gas service cart is equipped with an advanced purification system to effectively ensure gas quality.

‌Vacuum Performance‌: Good vacuum performance ensures that gas impurities and moisture in the equipment are fully extracted. The ultimate vacuum degree of the vacuum – pumping device of the SF6 gas service cart should be less than or equal to 10Pa to ensure the vacuum – pumping effect.

‌3. Examine Equipment Configuration‌

‌Compressor‌: The compressor is one of the core components of the SF6 gas service cart. It is advisable to give priority to double – stage single – acting compressors or semi – hermetic compressors that adopt advanced foreign compression technologies, which have stable performance and a long service life.

‌Vacuum Pump‌: The vacuum – pumping system mostly uses a double – stage vane – type vacuum pump, which has the characteristic of a fast vacuum rate. And the system is equipped with an anti – oil – return device to prevent the vacuum pump oil from flowing back and contaminating the SF6 gas.

‌Storage Tank‌: Select a storage tank with an appropriate volume according to the operation scale. At the same time, ensure that its maximum storage pressure meets the requirements and it has good sealing performance.

‌4. Consider Portability and Adaptability‌

If the cart needs to operate frequently at different sites, the portability of the SF6 gas service cart is crucial. The cart body design should be compact, with a moderate weight, and equipped with a good moving device, such as sturdy wheels and a structure convenient for towing. At the same time, the equipment should be able to adapt to different working environment temperatures to ensure normal operation under various climatic conditions.

‌5. Evaluate Safety Performance‌

Although SF6 gas is non – toxic, it may decompose to produce toxic substances under high – temperature and arc conditions. Therefore, the SF6 gas service cart should be equipped with complete safety protection measures, such as a safety valve to prevent excessive pressure, and the electrical system should have functions such as leakage protection and short – circuit protection. In addition, a gas leakage detection device should be equipped to monitor the SF6 gas concentration in the operation environment in real – time to ensure the safety of personnel.

‌6. Pay Attention to Brand and After – Sales Service‌

Choosing an SF6 gas service cart from a well – known brand usually ensures better product quality and performance. At the same time, a complete after – sales service is also indispensable, including timely technical support, sufficient supply of spare parts, and regular equipment maintenance and maintenance guidance, which can ensure the long – term stable operation of the equipment.

In conclusion, choosing a suitable SF6 gas service cart requires comprehensive consideration of operational requirements, core performance indicators, equipment configuration, portability and adaptability, safety performance, as well as brand and after – sales service. I hope this article can provide you with useful reference.

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