1.0.1 This code is formulated with a view to guaranteeing the construction and installation quality of power transformer, oil reactor and mutual inductor; promoting the technical advance and ensuring the equipment safe operation.
1.0.2 This code is applicable to construction and acceptance for power transformer (hereafter referred to as transformer), oil reactor (hereinafter referred to as reactor), voltage transformer (mutual inductor) and current transformer (mutual inductor) (hereinafter referred to as mutual inductor); the installation of petersen coil may comply with the relevant requirements of this code by reference.
1.0.3 The installation of transformer, reactor and mutual inductor with special purpose shall meet the relevant requirements of the product technical documentation.
1.0.4 This code specifies the basic requirements in the construction and acceptance for power transformer, oil reactor and mutual inductor in electrical equipment installation engineering. Where this code contradicts the requirements of national law or administrative regulation, the national law or administrative regulation shall prevail.
Besides the provisions of this code, the construction and acceptance of transformer, reactor and mutual inductor shall comply with the provisions of the related current national standards.
2 Terms
2.0.1 Power transformer
Stationary equipment with two or more windings, which can convert the A.C. voltage and current in a system to one in other system through electromagnetic induction at same frequency to transmit electric energy
2.0.2 Oil-immersed type transformer
Transformer whose iron core and winding are all immerged in soil
2.0.3 Dry-type transformer
Transformer whose iron core and winding are not immerged in soil
2.0.4 Winding
A group of line circles to form a electrical circuit corresponding to a certain voltage marked on a transformer
2.0.5 Sealing
Isolating coil and iron core in transformer inside from atmospheric air
2.0.6 Vacuumize
Extracting the air in the transformer with a vacuum pump to make the transformer to be at vacuum state
2.0.7 Hot oil circulation
Heating and circulating the insulating oil by lower-inlet and upper-outlet method under the condition of a transformer "full with insulating oil"
2.0.8 Resting
Making the air in the insulation oil rise to the top layer without any works involved with oil duct under the condition of a transformer "full with insulating oil"
2.0.9 Sealing test