Encapsulated Sf6 Gas Insulation Ac Test Transformer Systems For Gis Gil High Voltage Testing

YDSW series encapsulated SF6 gas insulation AC test transformers are especially designed for factory and field test of metal-clad switchgear (GIS), and substation equipments on-site testing. These transformers can be flanged directly to GIS, they make testing of such installations possible without feeding them through an air-SF6 bushing. If equipped with output bushing, they can also be used for AC voltage test of other HV apparatus.
In the factory, these transformers allow to test sub-assemblies and components directly in the manufacturing line, thus avoiding transportation to a central test facility, and extra handling. Particularly they are suited for on-site tests of GIS after assembly.
Compared to conventional oil insulation AC test systems, they are lighter and smaller, only about 1/6 height and 1/7 weight, also the merits of encapsulation remain effective during tests which is essential for PD testing.