Power distribution transformer and electrical power transformers offered by us are manufactured using advanced technology that ensure in the equipment low loss & high process efficiency. These distribution transformer and electrical power transformers are successfully catering to the demands of Indian as well as International Markets. Further, the equipment designed & produced by us are as per IS & IEC standards.

Range:

We can manufacture Distribution Transformers and Power Distribution Transformers from:

• 10 KVA to 40000 KVA up to 66 KV Class
• Furnace Transformers (Arc & Induction) up to 10 MVA
• Distribution Transformers upto 2500 KVA
  

Distribution Transformer & Power Transformer:

• Up to 150 kVA Single Phase both 11 & 33 kV Class
• Up to 40 MVA, 66 kV Class
• Up to 20 MVA OLTC 33 kV Class

Applicable Standards:

• IS: 2026
• BS – 171
• IEC – 76
• IEC – 726

These also meet ANSI, JIS, DIN and other industry relevant standards.

Transformer Options:

• Cooling Tubes / Radiators / Corrugated Tanks
• Pole Mounted / Ground Mounted
• Free Breathing / Hermetically Sealed
• CSP / Non CSP
• Winding-Copper/Aluminium (Foil /Rectangular Wire / Round Wire)
• Fittings and Accessories, Cable Terminations as required

Specifications:

Vector Group	Transformers will be connected as per vector group reference Dyn11 Other vector groups can be offered as per specific requirements
Terminal Arrangement	H. V. - Bare Bushings or Cable Box, L. V. - Bare Bushings or Cable Box Disconnecting chambers can also be provided on both HV and LV Cable boxes
Temperature Rise	Designed for a maximum temperature rise of 40 / 50 degree C of oil / winding Lower temperature rise can be offered on request

Standard Fittings:

• Rating and diagram plate
• Earthing terminals - 2 Nos
• Lifting lugs
• Oil level indicator (Plain)
• Drain-cum bottom filter valve with plug
• Oil filling hole with plug on conservator
• Oil conservator with drain plug
• Air release plug
• Silicagel air breather
• Bi-directional flat rollers
• HV terminals-outdoor bushings
• LV terminals-outdoor bushings
• Radiators
• Filter valve with plug
• Thermometer pocket
• Oil temperature indicator
• Externally operated off circuit tap changing switch
• Explosion vent
• Sampling value (for 2000 KVA & above transformers only)

Accessories (on request):

• LV and HV cable boxes
• Winding temperature indicator (WTI)
• Buchholz relay
• Magnetic oil level gauge
• Marshalling box
• Disconnecting chamber
• Oil temperature indicator with electrical contacts (OTI)
• Pressure relief valve

Ventilated dry type transformers offered by us are designed to provide totally maintenance free operations. These dry type transformers are also safe from fire as material used for manufacturing them are metals, ceramics, fibreglass and resin. As there is no usage of oil, these type of dry type transformers are also environment friendly.

Features:

• As there is no oil, handing becomes easier
• No chances of spillages and leakages
• Minimal non toxic smoke in case of fire
• Comes with class H/E insulation
• Can bear heat up to 180/220 degree C
• Can be used in humid & chemically polluted atmosphere

Specifications:

Winding

• Feature LV & HV winding (done in dust free air conditioned winding shops)
• Rectangular copper strips used for LV winding (insulated with Nomex)
• HV winding are of copper wire (insulated with Nomex or other suitable material for temperature rise if wrapping isn’t possible due to small diameter)

Testing

• All transformers tested for routine tests as per IEC & IS
• Testing done at in-house facilities

 
Advantages
 

• High level of safety
• No flammable liquids
• No pollution from leaks solution
• No toxic off-gasses
• Can be placed close to load
• More efficient
• Increased emergency overload capability
• Improved reliability
• Low Noise & low maintenance
• Easy to repair (open coils)

Routine Tests
 

• Measurement of Winding Resistance
• Measurement of Voltage / Turns Ratio
• Measurement of Impedance Voltage / Short Circuit
• Impedance & Load Loss
• Measurement of No Load Loss & No Load Current

Technical Specifications:

Parameters	VDT	Cast Resin
Conductor Insulation	Nomex	Non woven polyester
Thermal Rating	F or H/C	F/B or F
Process	Conventional Winding	Cast Mold Assembly
	Assembly
Impregnation	Vacuum pressure	Vacuum casting
	impregnation
Repair	Possible	Not Possible
Cracking	Not Possible	Possible
Overloading	High Over load margin	No Over load margin
Environment	Can be easily	Large amount of resin
Concern	disposed of	to be disposed of
Safety	No toxic off gases,	Emission of toxic gases
	no melting
Partial Discharge	Free of partial	Partial Discharge is possible
	discharge	due to high probability of
		bubbles formation during casting

We hold expertise in meeting the demands of transformers with OLTC arrangement. For ensuring in them optimum functionality standards, these industrial transformers are also made to undergo rigorous quality control checks as well as are routinely tested as per IS / IEC in our fully equipped laboratory. Further, we can also meet client’s any specific test requirements as specified by them.

Tappings:

Off Circuit Tap Changing Switch Tappings

• From + 5% to - 5% in steps of 2.5% for HV variation
• Can also be arranged as per customer’s requirement

On Load Tap Changer

16 steps OLTC for HV

• Variation from + 5% to-15% in steps of 1.25%
• These can also be offered as specified by clients
• OLTC for remote / auto / parallel operation can also be offered

Variable transformers offered by us used for testing applications where variable output is required from 0 to any voltage. These electrical power transformers, variable transformers are widely used in transformer, motor and generator manufacturing units to perform different electrical tests.

Construction & Availability:

Simple construction consisting of:

• Buck/Boost Double Wound Transformer
• +/- Type linear rolling contact regulator for stepless control
• Widely available up to 10 MVA

Isolation transformer and ultra isolation transformers offered by us feature multiple shielding techniques that are employed to reduce inter winding capacitance to below 0.005 picofarad. Further, use of advanced production techniques also increases DC Isolation to over 1000 Megaohms.

Features:

• Provides isolation from any kind of leakage in Current
• Provides isolation from any kind of Spikes/Surges produced in system
• Provision of electrostatic shield between primary and secondary winding depending upon its construction, specification and performance characteristics

Usage:

Isolation / Ultra Isolation Transformer are being used to protect:

• Electronic & Sophisticated equipment
• CNC Machines from excessive line voltage transients
• Isolating sensitive equipment from Line Voltage transients, spikes and D.C. leakage
• Protecting sensitive critical equipment like computers & peripherals, medical instrumentation, digital communication telemetry systems, CNC Machines

Other Features:

• High Value of Coupling Capacitance
• Maximum Linkage of magnetic Field
• The Leakage Current
• Static transfer of Electric Noises

H.T. Transformer with built-in automatic voltage stabilizer (Combo) offered by us meets the correction demands of voltage fluctuation on the HT side.  These electrical power transformers are feature built-in rolling contact type AVR that makes them suitable for indoor/outdoor installations.


Features:

• Copper wound HT Two-in-one system
• Provides superior voltage regulation and stabilization
• Has built-in HT Automatic voltage regulator that operates on load, sleeplessly
• A combination of HT AVR with a standard distribution transformer
• Fluctuating voltage from grid is initially controlled by HT AVR and then only fed to transformer resulting in constant L.T. Output
• Within +/- 1% accuracy
• Lesser losses & more efficiency

The unit consists of:

• Step down double wound in copper construction
• On load stepless rolling contact type voltage regulator
• Buck/boost transformers

Advantages:

• Space Saving
• Better Efficiency
• Protection of Motor & Other Associated Equipment
• Reduced Installation Costs
• Reduction in Electricity Bills

Automatic servo voltage stabilizer offered by us come in Air/Oil Cooled construction for both LT & HT lines from 20 KVA to 5000 KVA as per international standards. Our extensive industry and process experience as well as services of qualified engineers allow us to ensure in the end equipment best output and functionality standards.

Why automatic servo stabilizer:

Higher current affect electrical motors (particularly smaller capacity motors up to 7.5 H.P) in three ways:

RANGE 10 KVA TO 7000 KVA:

• Higher current produces higher losses in electrical motors that causes premature failure of winding
• Higher losses of electric motors also increase losses of cables, switches, transformers & other associated equipment

Safeguards undertaken by us:

For smooth continuous operation of motors, over load relays set at 20% higher setting

Advantages:

• Better efficiency in plant environment
• Improvement in power factor (only in case of high voltage)
• Power Saving (reduction in power bills)
• Reduction in MDI
• Uniform quality of end products
• 100% depreciation as per income tax act
• Better efficiency in plant

Construction:

Servo Controlled AVC is manufactured as per IS: 9815. Servo stabilizer primarily consists of the following:

Liner Plus / Minus Type Vertical Rolling Contact Voltage Regulator

Advantages:

• Use of heavy section electrolytic grade rectangular copper strip that minimizes losses & increases efficiency of equipment
• Use of self-lubricating carbon roller assemblies that offers more reliability and trouble free performance of equipment

Double Wound Buck / Boost Type Series Transformers

Advantages:

• Use of CRGO lamination to minimize iron losses
• Use of coils wound with heavy section of multi strips electrolytic copper for minimizing copper losses as well as getting better efficiency from the equipment

Electronic Control Circuit and Meter Panel

• Very simple electronic control circuit
• Easy provision for monitoring and controlling voltage, repair and maintenance
• Oil cooled and housed in same/ separate sheet steel tanks
• Radiators provided for effective cooling
• Coils are vacuum impregnated and oven dried as per IS

Features:

Temperature Rise

• Designed for 30-35 degree C above ambient
• Suitable for any kind of ambient temperature condition

Core

• Constructed from low loss CRGO M-4 Grade
• Confirming to latest standards
• Fitted and clamped with special built in-house frames
• Designed to reduce magnetic noise
• Designed to make structure rigid & robust

Click PDF For  Technical Specifications

HT automatic voltage stabilizers offered by jus feature Copper winding for durable and consistent performance. These HT AVR automatic voltage stabilizers, power stabilizer are suitable for indoor / outdoor installation as well as meet the requirements of voltage regulation and stabilization.


Features:

• Standard off - circuit tapping of transformers can correct limited voltage variation
• Backed by modern technology that operates on load, sleeplessly
• Designed to provide stabilized voltage on HT side
• Fluctuating voltage from Grid initially controlled by HT AVR and then only fed to transformer resulting in constant H.T. Output
• Within +/- 1% accuracy
• Robust design
• Lesser losses and more efficiency make these distribution transformers utilize up to 100% capacity

Power rectifiers offered by us find usage in DC applications. Our extensive process experience as well as services of experienced industry professionals allows us to successfully meet the power rectifiers demands in varied applications like in as plating rectifiers, anodising rectifiers & hydrogenation rectifiers applications.
 
Plating Rectifiers

• Manufactured using modern technology for Plating, Anodising & Hydrogenation applications

These plating rectifiers consist of three parts:

• Double wound Transformer
• Linear Rolling contacts type Regulators
• Silicon Diode Cubicle

Features:

• Designed to take up/absorb Spike/Surges produced in system
• Suitable for 100% load for continuous duty cycle (are recommended to put 10% over load also)
• Process efficiency of transformers used in Rectifier increases to more than 95%
• Ripple contents of Rectifier will not more than 5% of value
• The designs are such that temperature rise would not increase above 25-27 degree centigrade above ambient (at 100% load results)
• Higher Efficiency & lesser losses
• Use of IPT Transformers in Rectifiers that further reduces losses of system

Specifications:

• Input Voltage: 380 - 440 Volts, 3-Phase 50Hz. AC supply
• Output Voltage: Fixed rated maximum DC voltage or variable from zero to maximum rated voltage
• Output Current: Rated maximum DC current
• Temperature Rise: Less then 35oC above ambient at the top of oil
• Efficiency: 12V Rect - 82%, 24V Rect - 90%, 100V Rect - 94%, 200V Rect-96% More than 250V Rect-More than 97%
• Ripple Content: Less than 5%
• Insulation: `AÂ’ class for oil cooled

Salient Features:

• Rectifier equipment wound with electrolytic Prime grade copper strip for minimizing power losses
• Equipment designed liberally as per capacity
• Ideally suitable for marginal over loading conditions
• Use of vertical rolling contact type voltage regulator (wound with heavy section of copper strips)
• Suitable for 100% continuous duty cycle or industrial applications
• Use of carbon rollers that move on both sides of winding

Diodes:

• Silicon diodes tested in-house
• PIV batch & same forward drop diodes used in equipment for equal load sharing (for reducing power losses of diodes)

Lamination core:

• Use of imported CRGO lamination core that results in minimum power losses
• Better efficiency of equipment and saving energy bill

Paints:

• Painting of equipment with Epoxy paint that is resistant to acidic environment of plating process
• Enhances life of equipment by preventing it from corrosion

Meter:

• Use of reputed make AE/RISHAB DC meters (accurate and durable)

Constant voltage controller (CVC) (optional):

• Use of CVC Electronic attachment with rectifier equipment (for maintaining constant Output Voltage or current as per setting automatically irrespective of input voltage variation)

Servicing:

• Prompt and reliable after sales service