Precautions for Maintenance of Insulating Pipes
Insulating tube is a kind of insulating material, which is a general name. It has the advantages of flame-retardant, soft, heat-resistant, easy to use, reliable electrical properties and so on. If the insulation pipe problems need to be repaired, the following problems should be paid attention to:
1, in addition to the conditions of clean and dry assembly, it is best to assemble at 40-50°C. Because the capacitor core temperature higher than the ambient temperature when the temperature 10 -15°C can reduce the effect of moisture. It is better to heat the components and capacitor core of the insulating pipe to 70-80 degrees before assembling,then keep 3-4h, so as to exclude the moisture of the surface and to finish the fashion as far as the temperature has not yet been lowered.
2. The sealing of the top of the insulated pipe. The seal at the top of the casing can be divided into the seal of the casing itself and the sealing of the wire of the cable. At present, the top of the main transformer of most transformer substations is equipped with elastic corrugated plate, which is combined with the pressure spring to adjust the temperature change. When assembling the elastic corrugated plate, the sealing ring between the positive and negative compression nut on the pipe and the gasket on the oil storage cabinet must cooperate properly to prevent the corrugated plate from cracking, so as to achieve the sealing effect.
3, the insulation tube lead is a cable structure. If the sealing between the top connection plate and the conductive head is not strict, the rainwater will penetrate into the transformer along the casing top wiring board, the conductive head and the cable line. When the water enters the root of the transformer lead, it will lead to damp breakdown and cause power outage. In order to avoid this situation, the bolt must be pressed tightly to ensure the seal.