UnitisedTransportable Substation is used for feeding power from high voltage tolow voltage in open cast mines, construction sites, metro cities etc.The substation is compact in size, suitable for
frequent shifting andfor use in outdoor locations. The substation is installed and mountedon skid frame or wheels or channels and is provided with lifting hooks.The unitised substation comprises
of the following main components :
- VacuumCircuit Breaker panel in outdoor enclosure upto 11KV 1250A completewith CT, PT, Relay & Instrument chamber. The outdoor panel isdirectly coupled with HT Flange of the transformer with
copper busbars.The incoming of the HT Panel is provided either with Plug Socket orCable box. Alternatively a Load Break Switch or a Ring Main Unit canalso be coupled with the HT bushing of the
transformer.
- Outdoortype Transformer upto 1600KVA 11KV-6.6KV-3.3KV/415V, DYn11, ONAN withoff load tap changing switch and standard fittings as per IS/IECstandards. The transformer has HT Flange with
bushings to be coupleddirectly with the outgoing of the HT Panel and LT flange with theincoming of LT Panel. The transformer can be either Oil immersed typeor Dry type with Nomex insulation. With
Dry type transformer the totalunit can be housed in a single outdoor type enclosure in place of threeseparate enclosures.
- LTPanel is outdoor type comprising of one or more air circuit breaker orMCCB either in single or board formation suitable for a System Voltageof 415V,3-Phase 50 C/S. Incoming of LT Panel is
directly coupled withthe LT flange of the transformer. The outgoing is either Cable box orPlug & Socket arrangement for feeding power to LT equipment.