With the characteristics of full insulation, full sealing and strong maintenance-free, inflatable ring network cabinets are widely used in urban distribution networks, community power distribution, factories and outdoor photovoltaic projects. Although the overall stability is high and the failure rate is low, long-term outdoor operation, affected by temperature difference, humidity, and dust, still requires regular and simple inspection and maintenance, which can effectively avoid common faults such as air leakage, aging insulation, and stuck operation, and extend the service life of the equipment.
Daily maintenance is mainly based on appearance inspection, air pressure check, mechanism observation, cleaning and fastening, with simple operation and strong practicality.
The first is the inspection of the appearance and the sealing of the cabinet. Daily inspections first check whether the outer shell of the cabinet is deformed, painted, or corroded, and whether the door sealing strip is intact. Outdoor equipment is most afraid of rain and moisture infiltration. Once the seal ages, dust and water vapor enter the cabinet, which will cause the insulation to creepage and age. At the same time, check whether the ground terminal of the cabinet is firm and rust-free. Poor grounding will directly affect the fault protection action.
The second is the gas pressure verification, which is the core of the maintenance of the inflatable cabinet. Regularly observe the values of the pressure gauge and density relay to confirm that the pressure is in the standard range. The low pressure indicates that there is a slight air leakage, and it is necessary to detect and replenish the air in time. Long-term low-pressure operation is strictly prohibited. Insufficient gas will cause the arc extinguishing ability to decrease, and it is prone to arc hazards when closing the gate. During the inspection, pay attention to whether there is any abnormal noise in the cabinet. There is a high probability that the abnormal sizzling sound is a partial discharge, and it needs to be stopped for investigation.
Again, the operating mechanism and instructions are checked. Check whether the position indication of the sub-closing and grounding switch is accurate, and the mechanical state is consistent with the actual operating state. Check whether the energy storage mechanism is normal, no stagnation, and whether the interlocking device is sensitive and reliable to avoid the hidden dangers of misoperation. For equipment that has not been operated for a long time, it is recommended to divide it at no load several times regularly to prevent the mechanism from rusting and caton.
Finally, do simple cleaning and fastening maintenance. Clean up the surface of the cabinet and the dust in the cabinet when the power is off, and keep the insulation clean and tidy. Check the cable joints and secondary terminals for loosening, heat generation and discoloration, and tighten the screws slightly. In areas with large outdoor temperature differences, routine maintenance can be carried out once a year, without frequent disassembly.
Overall, the inflatable ring network cabinet does not require complex and frequent maintenance. As long as it does a good job of normal inspection, ensures sufficient air pressure, good sealing, and flexible mechanism, it can operate stably and safely for a long time, greatly reducing the probability of on-site failure.
