There are some minor problems in the design, manufacture, installation, operation and maintenance of the insulated gas charging cabinet, so some faults may occur occasionally. What is the cause of the failure of the fully insulated gas filled cabinet?
1. The lifting spacing of fully insulated gas filled cabinet or the gas passing through the gap structure is insufficient:
Inadequate climbing distance and large air gap are the key reasons for the damage of inflation cabinet in safety accidents. Especially in the hand cabinet, in order to reduce the specification of the cabinet, greatly reduce the spacing between disconnectors, protective sockets or grounding in the cabinet, but no measures have been taken to ensure the insulation compressive strength;
2. The manufacturing quality and processing technology of all insulated gas filled cabinet are poor:
The manufacturing quality and assembly line quality are not conducive to the general working pressure level of the inflatable tank. The sub components inside the cabinet can be tested according to the working voltage, but due to poor assembly quality, they cannot be tested as a whole. If the screw arc is tightened, too many nuts will be produced after the screw is tightened, which not only reduces the insulation spacing, but also causes partial electrostatic field concentration. In addition, due to the poor quality of the porcelain column at the supporting point and the poor reliability of the driving force, the porcelain column broke under the impact of the short circuit capacity, resulting in more safety accidents;
3. The fully insulated gas filled cabinet has insufficient or loose touch ability;
When the capacity to touch the volume is insufficient or loose, part of the temperature rises. When the touch is relatively serious, part of the current carrying capacity will be burnt, causing the working grounding protection device or phase flashover, leading to insulation flashover. It was previously reported that the thermal burning of the pile head under the knife switch caused the short circuit failure of the power distribution station, which caused the social fire safety accident data explosion risk event;
4. The contact capacity of fully insulated gas filled cabinet is insufficient or poor:
When the contact capacity is insufficient or the contact is poor, the local temperature will rise, and the current carrying part of the contact will be seriously burned, resulting in grounding or interphase arc and insulation flashover. It was previously reported that a substation was closed due to the heating of the pile head under the knife switch, resulting in a short circuit and a fire and explosion accident.
5. Impact of environmental conditions on fully insulated gas holder:
The main reason for the insulation accident is the environmental conditions of the gas insulated cabinet. The air pollution is becoming more and more serious, causing increasingly serious pollution to the insulators, bushings and buses of electrical equipment.
6. Environmental problems in the fabrication of fully insulated gas filled cabinets:
Manufacturing quality and assembly quality have a great impact on the overall pressure level of the gas charging cabinet. Some parts in the cabinet can pass the pressure test, but the overall fault is poor assembly quality; The irregular fastening screws shorten the insulation distance, have poor quality, and are dynamically stable and broken under the impact of short circuit current.
Hengfengyou Electric Electrical distribution cabinet, distribution board cabinet and distribution pannel,Factory &Manufacturer 30years. sold to more than 50 countries around the world. CB CCC UL KEMA . Hengfengyou Electric will provide you with the best low-voltage distribution solution.【WhatsApp： +86158 5326 5269（Alisa） sales@panel-builder.cn https://www.panel-builder.cn 】
