Transformers

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A transformer is an electrical device that transfers electricity from one circuit to another with change in voltage, current, phase or other electric characteristics. Transfer of electricity from one circuit to another is purely by magnetic coupling, without relative motion of any part. Transformers are essential in high voltage power transmission providing an economical means of transmitting power over large distances. These are used for both industrial and commercial purposes. Ganpati Electricals (P) Ltd. is a well known and trusted supplier of a wide range of transformers of Crompton Greaves Limited.

Types of Cooling :

Oil-cooled Transformers : These are totally maintenance free and can be used both indoor and outdoor. Oil-cooled transformers are available in two versions namely (a) with OFF-load tap changer and (b) with ON-load tap changer.
Dry or Cast Resin Type Transformers : These are air-cooled, having an epoxy resin encasing the windings. These are ideal for indoor installation. However, because the molds for casting the coils are available only in fixed sizes, the design of such transformers is less flexible; this may increase the cost of customized dry transformers.

Types of Transformers :

Power Transformers : These convert an AC voltage and current to a different voltage and current with great efficiency and can be one of following types.

Description	Ratings	Voltages	Standards
Autotransformers	Up to 1000 MVA	Up to 765 KV	ANSI,IEC,NEMA,OTHER
Generator Step-up Transformers	Up to 1000 MVA	Up to 765 KV	ANSI,IEC,IS,BS,NEMA,OTHER
Small Power Transformers	Up to 25 MVA	Up to 138 KV	ANSI,IEC,IS,NEMA,OTHER
Medium Power Transformers	Up to 60 MVA	Up to 230 KV	ANSI,IEC,IS,BS,NEMA
Large Power Transformers	Up to 600 MVA	Up to 765 KV	ANSI,IEC,IS,BS
Regulating Power Transformers	Up to 20 MVA	Up to 66 KV	IEC,OTHER
System / Two Winding Transformers	Up to 300 MVA	Up to 275 KV	IEC,OTHER
Phase-shifting Transformers	Up to 500 MVA	Up to 525 KV	ANSI,IEC
HVDC Converter Transformers	Up to 750 MVA	Up to 500 kV	ANSI
Mobile Transformers	Up to 100 MVA	Up to 245 KV	ANSI,IEC
Shunt Reactors	Up to 125 MVA	Up to 765 KV	ANSI,IEC,IS,OTHER

Distribution Transformers : These are generally used in electrical power distribution and transmission and can withstand overloads.

Description	Ratings	Voltages	Standards
Amorphous Metal Cores Distribution Transformers	Up to 2.5 MVA	Up to 36 KV	IEC
Autotransformer	Up to 30 MVA	Up to 72.5 KV	IEC
Cast Resin Dry Type	Up to 10 MVA	Up to 36 KV	ANSI,IEC,IS
Conventional Oil Cooled Distribution Transformers	Up to 4 MVA	Up to 33 KV	ANSI,IEC,IS
Corrugated Tank Oil Cooled Transformers	Up to 2.5 MVA	Up to 33 KV	ANSI,IEC,IS
Converter Transformer	As per requirements	As per requirements	IEC,IS
Low Power Oil Immersed Transformers	Up to 31.5 MVA	Up to 132 KV	ANSI,IEC,IS
Neutral Grounding	Up to 1.25 MVA	Up to 66 KV	ANSI,IEC,IS
Pad-Mount Modular Distribution Centers	Up to 9.375 MVA	34.4 kV - 200 KV BIL	ANSI
Phase-Shifting	Up to 5 MVA	Up to 36 KV	IEC
Primary Unit Substation Transformers	Up to 30 MVA	138 KV	ANSI
Secondary Unit Substation Transformers	Up to 33 MVA	Up to 34.5 KV	ANSI
Self Protecting Distribution Transformers	Up to 400 KVA	Up to 36 KV	IEC
Single-phase Pole mount Distribution Transformers	Up to 100 KVA	Up to 36 KV	IEC
SLIM Transformer®	Up to 10 MVA	Up to 72.5 KV	ANSI,IEC
Bio-SLIM® Distribution Transformers	Up to 7 MVA	Up to 72.5 KV	ANSI,IEC
Small Power Distribution Transformers	Up to 14 MVA	69 KV, 350 KV BIL	IEC
Steep-Wave Distribution Transformers	As per requirements	As per requirements	IEC
Three-phase Pad-Mounted Transformers	Up to 10 MVA	Up to 34.5 KV	ANSI
Three-phase Pole or Platform Type Transformers	Up to 5 MVA	Up to 36 KV	ANSI,IEC
Three-Phase Station Type Transformer	Up to 3 MVA	Up to 34.5 KV	ANSI
Wind pad Three-Phase	Up to 5 MVA	Up to 34.5 KV	ANSI,IEC

Special Transformers :

Description	Ratings	Voltages	Standards
Furnace Transformers	Up to 150 MVA	Up to 33 kV	ANSI,IEC,IS,BS,OTHER
Loco transformers	Up to 10 MVA	Up to 25 kV	IEC,IS
Traction Distribution Transformers	21.6 to 40 MVA	66 to 220 kVA	IEC,IS
Trackside Power Transformers	Up to 100 MVA	Up to 400 kV	IEC,IS,OTHER

Distribution Unit Substations - Mini & Micro Types :

Description	Ratings	Voltages	Standards
Unit Substation	As Per Requirements	As Per Requirements	IEC
Loco transformers	As Per Requirements	As Per Requirements	IEC
Micro Substation	As Per Requirements	As Per Requirements	IEC
Unitized Substation-Radix Series	Up to 1600kVA	Up to 12 KV	IEC,IS

Weatherproof Transformers : If required by client, we can also provide weather proof enclosure for the transformer.

Why Us? :
Transformers supplied by us come with standard fittings and accessories and conform to national and international standards. We purchase transformers only from trusted vendors and supply these to our clients at a reasonable price. Our technical team makes a thorough check before making delivery to the client, ensuring the following.

Even flow of current
High performance
Effortless maintenance
Long Serving Life
Timely Delivery
Reliability

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