Industry Overview
Distribution transformers are used to distribute electrical power in residential, commercial, and industrial areas. Since they remain energized for twenty-four hours with widely varying loads, they are designed to achieve low no-load losses and generally attain maximum efficiency at about half load. Amorphous core transformers reduce core losses by using thin amorphous metal ribbons with lower hysteresis and eddy-current losses than conventional crystalline electrical steel.
Amorphous metals are produced by rapidly cooling molten alloys to prevent crystallization, creating a vitrified structure commonly known as metallic glass. Typical amorphous transformer core materials include iron-based alloys containing boron, silicon, and phosphorus. Their high electrical resistance and thin ribbon construction help reduce eddy-current losses, while their lower saturation induction can require larger core dimensions. Mechanical brittleness and higher material costs also make amorphous core manufacturing more demanding than conventional transformer production.
Amorphous distribution transformers can be manufactured as single-phase or three-phase units with different core constructions. Their manufacture involves core preparation, coil winding, core-coil assembly, tank formation, painting, tanking, finishing, and comprehensive electrical and dielectric testing. The report also covers transformer construction, core losses, manufacturing processes, testing procedures, market conditions, plant layout, raw-material suppliers, machinery suppliers, and project economics.
Cost Estimation
| Particulars | Value |
|---|---|
| Plant Capacity | 4 Nos/Day |
| Land & Building (2000 sq.mt.) | Rs. 8.50 Cr |
| Plant & Machinery | Rs. 80 Lac |
| Working Capital for 2 Months | Rs. 2.40 Cr |
| Total Capital Investment | Rs. 11.97 Cr |
| Rate of Return | 24% |
| Break Even Point | 53% |
Content Index
- INTRODUCTION
- WHAT ARE AMORPHOUS CORE TRANSFORMERS (AMT’S)
- AMORPHOUS METAL
- SIGNIFICANTLY LOWERED CORE LOSSES
- OPTIMIZATION VIA ANNEALS
- LOWER DESIGN INDUCTION LEVEL
- LOSSES IN DISTRIBUTION TRANSFORMERS:
- AMORPHOUS CORE
- CARGO CORE
- COMPARISON OF CRGO AND AMORPHOUS CORE DTS:
- PROPERTIES OF AMORPHOUS METAL CORE
- FEATURES OF AMORPHOUS TRANSFORMER
- ADVANTAGES OF AMORPHOUS CORE TRANSFORMER
- DISADVANTAGES OF AMORPHOUS METAL TRANSFORMERS. THESE ARE AS FOLLOWS:
- AMORPHOUS TRANSFORMER STANDARD RATING
- HOW TRANSFORMERS WORK
- TRANSFORMER CONSTRUCTION
- TRANSFORMER CORE CONSTRUCTION
- TRANSFORMER LAMINATIONS
- TRANSFORMER CORE TYPES
- TRANSFORMER WINDING ARRANGEMENTS
- CORE-TYPE CONSTRUCTION
- TRANSFORMER CORE
- TRANSFORMER CORE LOSSES
- HYSTERESIS LOSSES
- EDDY CURRENT LOSSES
- USES AND APPLICATION
- B.I.S. SPECIFICATION
- PROCESS FLOW CHART
- MANUFACTURING PROCESS OF DISTRIBUTION TRANSFORMER
- MANUFACTURING OF TRANSFORMER BROADLY COVERS THE FOLLOWING PROCESSES:
- (A) COIL WINDING
- (B) CORE ASSEMBLY
- FIG 2.1.A. SINGLE PHASE TRANSFORMET
- (C) CORE-COIL ASSEMBLY
- (D) TANK FORMATION
- (E) PAINTING
- (F) BOX-UP OR TANKING
- (G) FINAL TESTING
- 1. INSULATION RESISTANCE TEST
- TEST PURPOSE
- TEST INSTRUMENTS
- TEST PROCEDURE
- 2. DC RESISTANCE OR WINDING RESISTANCE TEST
- TEST PURPOSE
- TEST INSTRUMENT
- METHOD NO: 1 (KELVIN BRIDGE METHOD FOR MEASUREMENT OF WINDING RESISTANCE)
- TEST PROCEDURE
- KELVIN BRIDGE
- METHOD NO: 2 (CURRENT VOLTAGE METHOD OF MEASUREMENT OF WINDING RESISTANCE)
- DC WINDING RESISTANCE TEST (CURRENT-VOLT METHOD)
- TEST PROCEDURE
- REQUIRED PRECAUTION
- TEST ACCEPTANCE CRITERIA
- TEST CAN DETECT
- 3. TURNS RATIO/VOLTAGE RATIO TEST
- TEST PURPOSE
- TEST INSTRUMENTS
- METHOD NO 1 TURNS RATIO TESTING
- TEST PROCEDURE
- TRANSFORMER TURNS RATIO METER (TTR)
- BRIDGE CIRCUIT
- THEORETICAL TURNS RATIO = HV WINDING VOLTAGE / LV WINDING VOLTAGE
- TEST CAUTION
- METHOD NO 2 VOLTAGE RATIO TESTING
- TEST PROCEDURE
- TEST ACCEPTANCE CRITERIA
- TEST CAN DETECT
- 4. POLARITY/VECTOR GROUP TEST
- PURPOSE OF TEST
- TEST INSTRUMENTS
- TEST PROCEDURE
- 5. SHORT CIRCUIT TEST
- TEST PURPOSE
- TEST INSTRUMENT
- MEGGER, MULTI METER, CT, PT
- TEST PROCEDURE
- SHORT CIRCUIT TEST (WITHOUT USING CT, PT)
- SHORT CIRCUIT TEST (WITHOUT CT)
- SHORT CIRCUIT TEST (WITH CT)
- ACCEPTANCE CRITERIA
- TEST CAN DETECT
- 6. OPEN CIRCUIT / NO LOAD TEST
- TEST PURPOSE
- TEST INSTRUMENTS
- TEST PROCEDURE
- TEST CAUTION
- ACCEPTANCE CRITERIA
- 7. CONTINUITY TEST
- PURPOSE OF TEST
- TEST INSTRUMENTS
- TEST PROCEDURE
- TEST CAN DETECT
- 8. MAGNETIC CURRENT TEST
- TEST PURPOSE
- TEST INSTRUMENT
- TEST CIRCUIT DIAGRAM
- MAGNETIC CURRENT TEST
- TEST PROCEDURE
- TEST CAUTION
- 9. MAGNETIC BALANCE TEST
- TEST PURPOSE
- TEST INSTRUMENT
- TEST CIRCUIT DIAGRAM
- MAGNETIC BALANCE TEST
- TEST PROCEDURE
- 10. HIGH VOLTAGE TESTS ON HV & LV WINDING
- PURPOSE
- TEST INSTRUMENT
- TEST CIRCUIT DIAGRAM
- HV HIGH VOLTAGE TEST
- LV HIGH VOLTAGE TEST
- TEST PROCEDURE
- 11. DIELECTRICAL TEST
- TEST PURPOSE
- TEST INSTRUMENTS
- TEST PROCEDURE
- METHOD NO 1 (SEPARATE SOURCE VOLTAGE WITHSTAND TEST)
- DIELECTRIC TEST (SEPERATE VOLTAGE SOURCE WITHSTAND TEST)
- METHOD NO 2 (INDUCED SOURCE VOLTAGE WITHSTAND TEST)
- ACCEPTANCE CRITERIA
- DIELECTRIC TEST (INDUCED VOLTAGE TEST)
- ACCEPTANCE CRITERIA
- METHOD NO 3 LIGHTING IMPULSE TEST
- 12. TEMPERATURE RISE TEST OF TRANSFORMER
- (H) FINISHING AND DISPATCH
- MARKET POSITION
- GROWING DEMAND
- MARKET SIZE AND TRENDS
- TRANSFORMERS INDUSTRY IN INDIA: OPPORTUNITIES & CHALLENGES
- POWER AND DISTRIBUTION TRANSFORMERS INDUSTRY IN INDIA
- MAJOR GROWTH DRIVERS
- THE CHALLENGES
- KEY TARGETS TO ACHIEVE IN TRANSFORMER BUSINESS
- AS PER PATEL OF JDS GROUP THE KEY TARGETS TO ACHIEVE ARE:
- TRANSFORMER INDUSTRY POISED FOR GROWTH
- STUMBLING BLOCKS
- AVAILABILITY OF CRGO STEEL
- FAILURE RATE OF DISTRIBUTION TRANSFORMER
- OUTLOOK
- KEY PLAYERS
- GLOBAL DISTRIBUTION TRANSFORMER MARKET - OVERVIEW
- PLANT LAYOUT
- MANUFACTURERS/SUPPLIERS OF AMORPHOUS DISTRIBUTION TRANSFORMER
- SUPPLIERS OF RAW MATERIALS
- SUPPLIERS OF AMORPHOUS RIBBON
- SUPPLIERS OF DPC COPPER WINDING WIRE
- SUPPLIERS OF HOT ROLLED SHEETS
- SUPPLIERS OF M.S. CHANNELS AND ANGLES
- SUPPLIERS OF M.S. FLAT
- SUPPLIERS OF M.S. PLATE
- SUPPLIERS OF M.S. PIPE
- SUPPLIERS OF TRANSFORMER OIL
- SUPPLIERS OF CRAFT PAPER
- SUPPLIERS OF M.S BOLTS AND NUTS
- SUPPLIERS OF TRANSFORMER BUSHINGS
- SUPPLIERS OF PAINT
- SUPPLIERS OF PLANT AND MACHINERY
- SUPPLIERS OF TRANSFORMER COIL WINDING MACHINE
- SUPPLIERS OF OIL FILTER MACHINE
- SUPPLIERS OF VACCUME IMPREGNATION PLANT
- SUPPLIERS OF ELECTRICAL MEASURING INSTRUMENT
- SUPPLIERS OF TRANSFORMER OIL TESTING KIT
- SUPPLIERS OF BENCH GRINDER
- SUPPLIERS OF DRILLING MACHINE
- SUPPLIERS OF SHEARING MACHINE
- SUPPLIERS OF WELDING MACHINE
- SUPPLIERS OF AIR COMPRESSORS
- SUPPLIERS OF MATERIAL HANDLING EQUIPMENTS
- SUPPLIERS OF PAINTING EQUIPMENTS
- SUPPLIERS OF EOT CRANE
- SUPPLIERS OF AIR POLLUTION CONTROL EQUIPMENTS
- SUPPLIERS OF PLATFORM WEIGHING MACHINE
- SUPPLIERS OF FIRE FIGHTING EQUIPMENTS
- SUPPLIERS OF SHOT BLASTING MACHINE
Appendix
- 01. PLANT ECONOMICS
- 02. LAND & BUILDING
- 03. PLANT AND MACHINERY
- 04. OTHER FIXED ASSESTS
- 05. FIXED CAPITAL
- 06. RAW MATERIAL
- 07. SALARY AND WAGES
- 08. UTILITIES AND OVERHEADS
- 09. TOTAL WORKING CAPITAL
- 10. TOTAL CAPITAL INVESTMENT
- 11. COST OF PRODUCTION
- 12. TURN OVER/ANNUM
- 13. BREAK EVEN POINT
- 14. RESOURCES FOR FINANCE
- 15. INSTALMENT PAYABLE IN 5 YEARS
- 16. DEPRECIATION CHART FOR 5 YEARS
- 17. PROFIT ANALYSIS FOR 5 YEARS
- 18. PROJECTED BALANCE SHEET FOR (5 YEARS)
Frequently Asked Questions
Amorphous core transformers are energy-efficient transformers that use a ferromagnetic amorphous metal core instead of conventional crystalline electrical steel. The core is formed from thin amorphous ribbons produced through rapid solidification that prevents crystallization. This material has favorable magnetic characteristics, including lower hysteresis losses, while its thin construction also helps reduce eddy-current losses. Amorphous core transformers are particularly suited to distribution applications where transformers remain energized for extended periods and reducing no-load or core losses is important.
An amorphous core reduces transformer losses mainly through lower hysteresis and eddy-current losses during magnetization. The amorphous alloy has a disordered atomic structure and is manufactured as a very thin ribbon, which limits the electrical paths available for circulating eddy currents. Lower hysteresis loss also results from the magnetic properties of the amorphous material. Because distribution transformers are energized continuously, reducing core loss can be particularly significant over the operating life of the equipment.
CRGO cores use grain-oriented crystalline silicon steel, whereas amorphous cores use rapidly solidified metallic ribbons with a non-crystalline structure. Amorphous material generally provides lower core losses, but it has lower saturation induction and is mechanically more brittle. These characteristics can require a larger core and careful handling during manufacturing. CRGO material has a more established manufacturing and processing infrastructure, while amorphous core technology requires specialized processing and core construction techniques.
The main manufacturing steps include coil winding, core assembly, core-coil assembly, tank formation, painting, tanking or box-up, final testing, finishing, and dispatch. Depending on the transformer design, additional operations can include insulation work, drying or impregnation, oil processing, fitting of bushings and accessories, and dimensional inspections. Quality control and electrical testing are performed at relevant stages to verify winding characteristics, insulation performance, turns ratio, polarity or vector group, dielectric strength, and other required parameters.
Distribution transformers undergo multiple electrical, insulation, and performance tests before dispatch. The report covers insulation resistance, winding resistance, turns ratio or voltage ratio, polarity or vector group, short-circuit, open-circuit or no-load, continuity, magnetic current, magnetic balance, high-voltage, dielectric, and temperature-rise tests. These tests help identify issues involving winding resistance, insulation condition, winding connections, magnetic circuit behavior, dielectric withstand capability, and thermal performance. The applicable test procedure and acceptance criteria depend on the transformer design and relevant standards.
Amorphous metals are used in distribution transformer cores because their magnetic properties can substantially reduce core losses compared with conventional crystalline materials. This is important for distribution transformers because they remain energized even when the connected load is relatively low. Amorphous alloys are produced as thin ribbons, which also helps limit eddy-current losses. However, their lower saturation induction, brittleness, higher material cost, and specialized handling requirements influence transformer design and manufacturing methods.
Amorphous distribution transformer manufacturing requires specialized core material along with electrical, structural, insulation, and finishing materials. The report identifies amorphous ribbon, DPC copper winding wire, hot rolled sheets, mild-steel channels, angles, flats, plates, pipes, transformer oil, craft paper, bolts and nuts, bushings, and paint among the supply categories. Equipment requirements include coil winding machines, oil filtration and vacuum impregnation equipment, electrical measuring instruments, oil testing kits, fabrication machinery, welding equipment, compressors, material-handling systems, cranes, painting equipment, and other plant utilities.
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