(1) Ring main cabinets commonly equipped with active distribution network power outlets, often feature P1r and CT transformers. These provide active distribution networks with data on power switching operations and load currents.
(2) Lightning Protection Error: Collapse of high-voltage lightning arresters at the deep foundation support points of the ring main unit, resulting in cable room short-circuit faults or battery charging/discharging issues at the ring main unit line heads.
(3) The inefficiency of the operational organization is due to the long-term lack of operation in damp areas for the ring net cage, which is highly prone to rust. This can lead to the inactivation of the organization, such as when touching the organization's torsion spring or operating the power switch, causing the organization to become ineffective.
(4) Common Faults in Cable Connections. The primary cause of common faults in RF cable connectors is poor cable head quality. Throughout the construction process, after the assembly of large cross-section cables, heat stress will gradually be released.
(5) A secondary circuit failure (operational switch power supply circuit) was caused by poor contact in electrical equipment or other reasons leading to damage.
(6) Common faults with cable support point composite insulators, busway channel piles' battery charging and discharging, and the discharge or damage of cable room support point composite insulators or busway channel piles under extreme conditions such as humidity.
(7) SF6 Gas Room Leaks lead to Short Circuit Faults in the Gas Room due to Gas Leakage from the SF6 Gas Room.
(8) Common faults in disconnect switches and high-voltage load switches. Currently, disconnect switches are suitable for ring cabinets. They are used in the composition of high-voltage load switches and for the maintenance and upkeep of large, medium, and small distribution transformers. After cracking, the mold pin cannot properly open and close the power supply organization, causing the problem to expand.
