NSRM-7.2 SF6 gas-insulated ring main unit

Although SF6 gas has a high greenhouse effect potential, the annual leakage rate of the equipment gas chamber is ≤ 0.01%, and the leakage amount is extremely low and controllable; Equipped with a density controller with temperature compensation function in daily operation, it can monitor gas pressure in real time and alarm promptly when leaks are detected. After the leakage, professional personnel need to use specialized equipment to recover the gas and avoid direct discharge. At the same time, the leakage points (welds, sealing rings, pipeline connections, etc.) should be inspected and repaired, and qualified SF6 gas should be replenished.

The equipment air chamber is designed to be maintenance free. The core maintenance is concentrated on the secondary components and mechanical mechanisms, and the regular maintenance cycle is 1-2 years. The main content includes checking whether the density controller indication is normal, whether the secondary wiring is firm, the operating status of components such as contactors and position indicators, and the flexibility of the mechanical interlocking mechanism. It does not require frequent unpacking and maintenance, and the maintenance cost is significantly lower than that of traditional switchgear.

If the moisture content of SF6 gas exceeds the standard value (≤ 150 μ L/L), the SF6 gas can be directly replaced or dried if it slightly exceeds the standard value; When the exceedance is severe, it is necessary to first evacuate the gas chamber, replace the adsorbent, and then inject qualified SF6 gas that has been dried. At the same time, investigate the pathways of moisture infiltration (such as aging of seals, damage to the gas chamber, etc.) to avoid repeated problems.

It can adapt to environments with an altitude of ≤ 5000m (please specify in advance if the altitude exceeds 2000m for customization and optimization), with a temperature adaptation range of -50 ℃ to+50 ℃. It can cope with extreme environments such as high temperature, severe cold, high altitude and low pressure, without the need for additional heat dissipation or insulation devices, and is widely applicable to different climate regions.

The core differences are reflected in three aspects: first, space occupation. This device has reduced its size by more than 30% and is suitable for space limited scenarios; The second is insulation performance. SF6 gas has higher insulation strength, is less affected by the environment, and has a lower failure rate; The third is the operation and maintenance cost. The maintenance free design of the gas chamber significantly reduces the workload of maintenance, and the self-healing function reduces power outage losses, making it more cost-effective in the long run.

It fully complies with multiple national and international standards, including GB/T3906-2020 “3.6kV~40.5kV AC Metal Enclosed Switchgear and Control Equipment”, IEC62271-200:2011, GB/T1022-2020, etc. It has passed type test certification, and all performance indicators meet industry standards, making it safe to connect to various power grid systems.