Oil Type Transformers

Single-phase and three-phase transformers for the range above 16Kva and up to72.5kV.These units are designed for power centers ,substations and networks

Also for pad mounts. They are used in public distribution systems, commercial Buildings and industrial complexes. The unique core and coil designs and the use

Of special turn insulating materials make these units extremely compact, reliable and durable.

Product	kVA	Primary Voltage(kV)	Features
Small distribution transformers	≤250	up to 36	Used for indoor or outdoor applications, can be provided with offload tap-chargers
Medium distribution transformers	≤2000 >250	up to 36	Used for indoor or outdoor applications,can be provided with offload or onload tap-chargers
Large distribution transformers	>2000	up to 72.5	Used for indoor or outdoor applications, can be provided with offload or onload tap-chargers
Single phase transformers	≤100	up to36	Small distribution transformers for pole mounting

SMALL DISTRIBUTION TRANSFORMER

Three phase oil type small distribution transformers within the range up to 250kVA and 36kV. The transformers are adaptable for pole mounting or assembly in substations.Hermetically sealed transformers completely filled with oil

MEDIUM DISTRIBUTION TRANSFORMER

These type of transformers ratings in between 250kVA and 2000kVA and the primary voltge up to 36 kV.They are used in both indoor and outdoor applications with on load aand off load tap changer.Hermeticallysealed.(Ratedpower < 1000kVA)

SPECIFICATION

Standards: IEC, IN, BS, UNE, PN etc

301-2000 kVA ,Three phase ,65 degree celsius maximum wining temperature rise

50 Hz standard,60 Hz optional

High voltages 3000-35000 V

Low voltage 100-15750 V

Vector group Dy, Yy, Dd, Yd

Impedance voltage : 4-7 %

Voltage Regulation : ±2 x 2.5%; ±2 x 5 %; ±2.5 %,-3 x 2.5 %

LARGE DISTRIBUTION TRANSFORMER

Distribution trans-formers within the range grater than 2000 kVA an the primary voltage up to 72.5 kV

The transformers are manufactured and tested in accordance with the IEC Publication 76

They are also incompliance with several national standards e.g.BS171, VDE0532,SS 4270101etc.

The transformers can be over loaded in accordance with IEC Publications 354(1972).The on-load tap changer and bushings have been chosen so as not to limit the overload capability. The cooling methods are ONAN or ONAN,ONAF

STANDARD FEATURES

• Oil filling plug on the cover
• Oil-level indicator
• The two lifting lugs on the cover are made for lifting the transformer or its removable part
• Corrugated tank
• Under carriage with bi-directional rollers
• Oil drain valve
• Off-circuit tap changer handle
• Earthing terminals
• Sparking gaps for voltages 15kV and above
• Rating plate

CONSTRUCTIONAL FEATURES

The transformers are of the breathing ,conventional type provided with an oil conservator. Two type so transformers are manufactured

• Transformers with off-load tap changer
• Transformers with on load tap changer

SINGLE PHASE TRANSFORMERS

Ranges 15 kVA to100 kVA with voltages up to a maximum of 36 kV

Two types of transformer are manufactured

• Sealed construction
• Free Breathing construction

Standard features for EATS or ANSI can be provided

• All units are supplied with hot-dip galvanized tanks including
• Lifting lugs
• Cover mounted, high voltage porcelain bushing with eye bolt terminal or spade terminal
• Fiber glass reinforced polyester or porcelain low voltage insulators