Voltage: up to 1000kV
Current: up to 4A
SF6 gas insulated test transformers are espencially designed for testing metal-clad switchgear (GIS) in the factory and on-site, and for testing on-site substation equipment. The conventional transformer can be flanged directly to the GIS. This makes testing of such installations possible without feeding them through an air-SF6 bushing.
Therefore the merits of the encapsulation remain effective also during the test which is essential for PD tests. These systems are particularly suited for on-site tests of GIS after assembly. In the factory, they allow to test sub-assemblies and components directly in the manufacturing line, thus avoiding transportation to a central test facility, and extra handling.
The height of SF6 insulated system is only 1/6 of conventional AC test transformer, and weight is 1/7 of conventional system.