Conventional AC test transformers are especially designed for testing objects of medium capacitance in the factory. These systems are particularly suited for tests requiring stable voltage even if the load changes during the testing (heavy corona, wet & pollution tests) or when the load is of inductive kind (inductive voltage transformers). The possibility to stack several of these transformers allows to reach very high voltages by keeping a reasonable floor space.
The MAX energy is 9.6MVA. Max. charging voltage is 1200kV.