Metal tank type: to be used as a separate reactor and the tank should be grounded. Such reactors can be placed next to a wall (and even can be placed outdoors) to save space. When it is placed out of door, a bushing is used to transmit the high voltage into the lab. Metal tank reactor can also be used in series or in parallel connection. When it is used in series connection, insulated support is needed. Metal tank-type transformer capacity is larger than insulated cylinder type transformer, can be used for high voltage pollution tests, test line and continuous test required capacity. This design is most suitable for outdoor use, and therefore recommended for use in areas with poor climatic conditions, especially in high humidity areas and tropical countries.
Metal tank type test transformer current is higher, can run continuously, suitable for rain and pollution tests. It can be equipped with oil or gas bushing, and directly connected to GIS.