The principle to reduce no - load loss in transformer by multi - joint lamination method is introduced . the reasonable joint structure in core is presented
2.
Three phase dry type power transformer , which make it with those features : safety , reliability , and energy saving , fireproof , flameproof , simple maintenance etc . , the design is advanced ; the structure of products is reasonable and the outline is fine , the main performances of the products are much better than the national standards , for example , partial discharge level no - load loss , on - load loss , noise level , it is adaptable for application on heavy humidity and severely pollute places which are near to lake , sea and rive , as well as , high demand - fireproof , heavy load capacity place , such as : high building , airport , station , port , underground , hospital , electrical power station , metallurgy , shopping center , residential area and petroleum chemical industry , nuclear power station , nuclear - powered submarine
3.
Windings d . c . resistance measurement , measurement of impedance voltage and on - load loss , measurement of no - load loss and on cload current , power frequency withstand voltage test , inductive voltage with standing test , measurement of partial discharge level , inspection of appearance and dimension inspection of name plate
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