Nacional de Transformers - TESLA offers dielectric oil insulated, selective type manual operation switch boxes, for configurations from 2 to 6 ways in 200 and 600 amps , in voltage levels of 15 kV with dead front garden type and occasional or totally type Submersibles and non-sectioned air insulated junction boxes for 15 kV in 200 and 600 A. Other number of ways and configurations for 200 amps in 34.5 kV can be supplied under special request. They are designed and manufactured under the NTC or ANSI standard. Optimal for the distribution of underground electrical energy, offering a safer and more modern installation.

The control boxes are used to provide manual sectioning of 2 or more circuits, they are immersed in oil because the disconnectors must be operated under load, all their elements and connections are made inside the tank depending on the required configuration, guaranteeing the amperage and level. voltage of each track both in the disconnector and in the terminals. The connection elements are pre-molded type and are protected by a protection cabinet that gives the condition of dead front; for submersible type applications the connection elements are located on the main tank cover.

Unlike the maneuver boxes; junction boxes are non-sectionalized and air-insulated. It allows the same configurations as the switch boxes and they are made through Junction Bars that are installed inside a special cabinet, they are also available for 200 A and 600 A configurations.