Oil Immersed Distribution Transformers

General Features

STD Distribution Transformers are individually designed and manufactured to meet and exceed the highest industry standards and the exact specifications for the particular application involved. Special options and features are planned into the original design and built into the unit. STD Distribution Transformers are liquid-oilimmersed for the most efficient and reliable long-term operation in a wide variety of utility and industrial applications.

STD Distribution Transformers are liquid-oil-immersed with rated power in range from 25kVA up to 5,000kVA both types, hermetically sealed and with conservator. STD Distribution Transformers individually designed and manufactured in accordance with local and international standards and fully adapted for mounting in complete transformer substations and steel-lattice poles. The windings can be made from aluminium or copper depending on customer requirements and needs within different series of losses according to IEC 60076 and EN 50464-1, ANSI, BSI, IEEE, NEMA, TS EN60076.

  • Generation Step-up Units (GSU)
  • Transmission Substations
  • Distribution Substations
  • Industrial Plants
  • Oil & Gas
  • Cement
  • Chemicals & Petrochemicals
  • Rolling Mills
  • Mining
  • Desalination Plants

Main Characteristics
  • Power Rating : from 25kVA up to 5000kVA
  • Voltage Level : from 1,1kV up to 36kV
  • Frequency : 50 or 60Hz
  • Vector Group : single phase or three phase transformers with possibility of star, zig-zag or delta connections in any of its windings.
  • Number Of Windings : possibility to manufacture transformers with primary + secondary, double secondary, or triple secondary and any other type according to requirements of customer.
  • Cooling : according to UNE-EN/IEC 60076, ONAN, ONAF, KNAN, KNAF
Standard Accessories
  • Earthing Terminals
  • Low Voltage Bushings
  • Off Load Tap Changer
  • Safety Valve
  • Terminal Box
  • Filling Tap
  • Conservator (if not hermetic)
  • Buchholz Relay
  • Lifting Lugs
  • Thermometer pocket
  • Medium Voltage Windings
  • Bi-Directional Rollers
  • Magnetic Core
  • Oil discharge and extraction valve
  • Low Voltage Windings
  • Clamps
  • Oil level indicator (if not hermetic)
  • Medium Voltage Bushings
  • Silica Gel Breather (if not hermetic)
  • Tank with Corrugated Wall
  • Plug-in connectors (upon request)
  • Earthing point on tank
  • Name plate
  • Jacking Pods
Accessories Upon Request
  • DGPT2 or RIS or DMCR (if hermetic)
  • LV Extension Bars
  • Safety Valve with Contacts
  • Winding Temprerature Indicator
  • Cable Box (MV / LV)
  • Oil Level Indicator with Contacts (if not hermetic)
  • PT100 sensors for oil temperature control (PTO)
  • Others (Contact Us)