Date: December 2010<\/p>\n
Company CA \/ Antofagasta \u2013 II Region.<\/p>\n
A work of reparation and maintenance of Pad Mounted substation<\/p>\n
Pad Mounted Transformer had deteriorated taps changer and fuse tube bayonet. The system had little silicon product in some filtrations, this is why the deterioration was caused.<\/p>\n
– Verification that there is no voltage neither in high nor in low voltages.<\/p>\n
– With nitrogen, the internal pressure is incremented so we can identify filtrations.<\/p>\n
– Removal of transformer lid to work with the transformer from the inside.<\/p>\n
– Removal of the silicon of the transformer. It is important to work in detail so that the displacement of copper over the nucleus towards the coils.<\/p>\n
– Used material is retired on the nucleus, cause of the internal crack.<\/p>\n
– Change of packages of caps and basement in low voltage insulators.<\/p>\n
– Change of base packages of database inserts.<\/p>\n
– Substitution of taps changer.<\/p>\n
– Change of fuse tubes in the interior (bayonet).<\/p>\n
– Cleaning of the active part with 40 l. of new dielectric silicon.<\/p>\n
– Cleaning of 40 l. silicon used in the cleaning.<\/p>\n
– Installation of a transformer lid and it is filled with 630 l. of silicon with a vacuum pump.<\/p>\n
– Measurement of the reason of transformation in all taps.<\/p>\n
– Measurement of resistance in all taps.<\/p>\n
– Measurement of insulating resistance (high-low, high-mass, low-mass)<\/p>\n
– Verification of hermeticism with pressure of nitrogen 0,5Kg\/cm2.<\/p>\n
– Cleaning of the transformer and room where it is installed.<\/p>\n
–\u00a0 Energization of substation; the entity in charge of local electricity is in charge of the action.<\/p>\n
– Verification of the service voltages and phase sequence.<\/p>\n\r\n\t\t\t\t