Package Substation (Unitized Substation Transformer)

UV Transformer offers qualitative range of PSS (Package Substation) or USS (Unitized Substation) Tranformer from 100 KVA to 2000KVA in11 KV Class. Compact Substation are used for feeding power from high voltage to low voltage. The substation is compact in size, suitable forfrequent shifting and for use in indoor / outddor locations. The substation is A unitized substation is a compact arrangement, which simplifies conventional substation design.

Substation housing is divided into three compartment i.e. the HV Compartment, the Transformer Compartment and the LV Compartment.


HV Compartment Transformer Compartment LV Compartment
Extendible & Non Extensible MV Switchgear - Ring Main Unit (RMU) Oil Immersed Transformer / Dry Type Transformer (VPI / Cast Resin) LV Distribution Board
Vacuum / SF6 Circuit Breaker, RMU & HV Fuse LT Control Panel with incomer ACB & Outgoing MCCB
RMU & Load Break Switch APFC Panel
Protection & Metering Devices LV Switch fuse unit
Current & Potential Transformer for Metering / Protection. Instrumentation and Metering
Illumination Internal Lighting & Door Limit Switches, Tailor made enclosures mounted on the transformer under base to provide single lift complete installation with theft proof design.


  • • Reduced electrical losses as USS can be installed near load centres.
  • • Total economy in cost.
  • • Higher degree of safety and operational reliability is achieved by HT and LT switchgears and protective relays to avoid overloading.
  • • Reduction in logistic cost as USS is delivered as a single unit.
  • • Low civil / foundation cost.
  • • Easy to operate, safe.
  • • Compact portable & ready to install
  • • Designed for better cooling
  • • Transformer dry type or oil cooled
  • • Low maintenance
  • • Customer made design
  • • Superior aesthetics
  • • Suitable for all weathers


USS(Unitized Sub Stations) / Package Sub Station are ideally suited for new residential and commercial complexes as it can be placed on Ground,partially or totally below / above ground level. Mainly used by Power Utilities, Multiplexes, Hotels, Hospitals, Shopping Malls, Software Parks, Residential Complex, Airport etc.