BIS Approval Letter

We are pleased to inform you that, recently we have obtained Approval for BIS Certification from Bureau of Indian Standards to use their ISI Standard mark on our Oil Immersed Distribution Transformers as per IS 1180 (PART-1):2014 for the following Ratings;

11KV/433V, Three Phase, Non Sealed, Copper Wound, CRGO Core, Energy Efficiency Level 1&2 of the Ratings 63KVA, 100KVA, 250KVA, 315KVA & 500KVA.

6.6KV/433V, Three Phase, Non Sealed, Copper Wound, CRGO Core, Energy Efficiency Level 1&2 of the Ratings 100KVA.

Our BIS Certification Mark License No: CM/L-6700054007

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Distribution Transformer

VOLTECH MANUFACTURING COMPANY LTD- Transformer Division belong to part of Voltech Group is a well-established manufacturer of Wide Range of Power & Distribution Transformers oil cooled type from 63KVA to 25MVA,upto 132KV Class.

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Power Transformer

We have type tested upto 10MVA 33KV / 11KV POWER TRANSFORMER.

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Distribution Transformer

We emphasize on quality and energy efficiency there by contributing to country’s energy conservation &optimizing the TOTAL OWNING COST of the transformers for the customer

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Products

List of Products

Distribution Transformers

Specification

  3 Phase, 50Hz, oil immersed transformer with voltage class up to 33KV.

  Continuous duty

  Application - Outdoor/Indoor application

  Terminal arrangement on HV - Bushings/Cable box

  Terminal arrangement on LV - Bushings/Cable box/Flange to suit bus duct.

  Winding material – Copper/Aluminum

  Insulation – Class A

  Tapping arrangement – Off circuit/On load arrangements

  Painting – As per customer requirements/As per standards

  Fittings & accessories – As per customer requirements.

Special Features

  Designed for a minimum span of 25years

  Design consistent with IS 2026 / IEC 60076

  Design ensures trouble free & smooth operations

  Operates with maximum efficiency.

  Losses as per ECBC norms

  Durable, reliable & equipped with modern manufacturing technique.

  Meritorious ability to handle overloads

  Tailor made to suit user’s requirements.

  Low hissing sound.

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Hermetically Sealed Transformers

Specification

  3 Phase, 50Hz, oil immersed transformer with corrugated fins & voltage class upto 33KV.

  Continuous duty.

  Winding material – Copper/Aluminum.

  Terminal arrangement on HV & LV- Bushings.

  Tapping arrangement – Off circuit arrangement.

  Insulation – Class A.

  Painting – As per customer requirements/As per standards

  Fittings & accessories – As per customer requirements.

  Completely oil filled/Partially oil filled.

Special Features

  Simple & robust in design and construction

  Less maintenance.

  Suitable where the place plays a major role

  Design consistent with IS 2026 / IEC 60076

  Sludge free & oxidation free.

  Aesthetic look.

  Zero contact to atmosphere.

  Suitable for renewable energy applications.

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Power Transformer

Specification

   3 Phase, 50Hz, oil immersed transformer with voltage class upto 132KV.

  Winding material – Copper

  Terminal arrangement on HV & LV - Bushings/Cable box/Flange to suit bus duct.

  Tapping range - Off circuit/On load arrangement

  Insulation – Class A.

  Continuous duty.

  Painting – As per customer requirements/As per standards.

  Fittings & accessories – As per customer requirements.

  Service conditions – As per standards

  Cooling – ONAN/ONAF.

Special Features

  F3 manufacturing & technology.

  Core designed to produce high efficiency.

  Design consistent with IS 2026 / IEC 60076

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Earthing Transformer

Specification

  3 phase, Oil immersed Zig-Zag connected transformers with voltage class upto 33KV class.

  Vector group – Zn0/Zn0Yn11/Zn0Yn11d

  Application – Indoor/Outdoor

  Continuous operation

  Standards – IS 2026/IEC 60076

  Fittings & accessories – As per customer requirements.

Special Features

  Design ensures the zero phase impedance & fault current.

  Limits the magnitude of transient over voltages.

  Long life span.

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Furnance Duty Transformer

Specification

   3 phase, Oil immersed transformers with voltage class upto 33KV class.

  Standards – IS 2026/IEC 60076.

  Tapping range - Off circuit/On load arrangement.

  Insulation – Class A.

  Vector group - Dyn 11, YNd 11, Dd0y11.

  Winding material – Copper.

  Painting – As per customer requirements/As per standards.

  Continuous duty.

  Application – Furnace application.

  Cooling – ONAN/ONAF

  Terminal arrangement on HV & LV - Bushings/Cable box/Flange to suit bus duct.

Special Features

   Trouble free operation.

   Durability

   High current at low voltage.

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Converter Duty Transformer

Specification

  3 phase, Oil immersed transformers with voltage class upto 33KV class.

  Type – 6Pulse/12Pulse/24Pulse

  Standards – IS 2026/IEC 60076

  Winding material – copper

  Terminal arrangement on HV & LV - Bushings/Cable box/Flange to suit bus duct.

Special Features

  Step up the voltage from generator to high tension distribution line efficiently.

  Featured design will reduce the harmonics.

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Generator Duty Transformer

Specification

  3 phase, Oil immersed transformers with voltage class upto 33KV class.

  Standards – IS 2026/IEC 60076

  Winding material – copper

  Terminal arrangement on HV & LV - Bushings/Cable box/Flange to suit bus duct.

  Vector group – Ynd11, Ynd1

Special Features

  Bidirectional power flow

  Robust construction

  Long life.

Auto Transformer

Specification

  Oil immersed transformers with voltage class upto 132KV.

  Standards – IS 2026

  Vector group – Ya0

  Cooling – ONAN

Special Features

  More efficiency

  Better voltage regulation

  Smooth operation.

Lighting Transformer

Specification

  Oil immersed transformers with voltage class upto 1.1KV

  Standards – IS 2026

  Cooling – ONAN

Special Features

  Restricts high voltage spikes

  Ensures exact voltage level in secondary side with minimum variation.

SCOTT – T Transformer

Specification

  Oil immersed transformers with voltage class upto 33KV

  Standards – IS 2026

Special Features

  This connection may also be used back to back T to T arrangement for a three-phase to 3 phase connection

  It distributes a balanced load between the phases of the source.


Service

Service

Customer List

Transformer Service


Successfully completed the 8.08MVA Rectifier Transformer Service, Order worth of 23.5 Lakhs

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Transparency

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What is a transformer?

Transformer is a static device used to transfer electrical energy from one circuit to other circuit.

What are the Characteristics of transformer?

   Normally operates at high efficiency. This implies the total loss of transformer should be low. (Please see www.bee.com for losses specified by Government of India for losses in respect of star rating transformers. Please see www.cea.gov.in and www.ecbc.com for losses for energy efficient transformers)

   It should withstand short circuit and switching impulses. This implies that the impedance should match that specified in IS 2026 without negative tolerance. Further the clearances between core and Low voltage winding, Low Voltage winding and High Voltage winding etc shall match with that specified in IS 2026.

  The core should not get saturated when an increase in voltage/frequency by not more than 10% is encountered. This implies that the operating flux density shall be between 1.3 tesla to 1.6 tesla.

   The Temperature rise in windings over ambient temperature should not exceed 50 degree and the oil should not exceed 40 degree. This implies that the current density of the conductor should be between 2 A/mm2 to 3.6A/mm2.

What are the steps to be taken by customer to ensure that he is buying the correct transformer?

   The customer should insist for the Test Certificate and delivery challans for the main materials viz Core,Copper/ Aluminum, Oil, Tape Changer, M.S Tank bought by the manufacturer.

  The customer should carry out at least two stage inspectionsviz one at the time of core & coil assembly and at the time of tanking and carrying out final testing.

   The customer should insist on measuring the voltage, current at transformer end only and not at the testing bench end.

  The customer should insist on a declaration from the manufacturer declaring that the rating of transformer has not been de rated and if it is found de rated at a later date then the manufacturer will replace the transformer free of cost.

   The customer should insist on a declaration from the manufacturer declaring the values of flux density of core, current density of conductors and clearances as per actual construction and in case if the values declared are found to be wrong at a later date the manufacturer should replace the transformer free of cost.

How do I select a suitable supplier for a transformer?

   Please carry out inspection of manufacturer’s factory premises and verify their Designing Capability, manufacturing Capability and Testing Capability.

  Please ascertain the current failure rate for the transformers supplied by the manufacturer.

   Please compare the Total Owning Cost, QAP and transparency.

   Please compare the delivery commitment.

   Please compare their after sale service and guarantee/warranty period.


Clients

Type Test

Contact Details

Mr. R.Adalarasan ( Vice president)    Marketing Head & Unit Head

 Mob:+91 9677055467 / 9600095610

044-43978000; Ext :243

adalarasan.r@voltechgroup.com / adalarasan.vtpl@gmail.com
      transformers@voltechgroup.com

  • Address
  • Voltech Manufacturing Company Limited
  • VOLTECH ECO Tower,
  • No. 2/429, Mount Poonamalle Road, Ayyappanthangal,
  • Chennai - 600 056.


Factory Address

    Voltech Manufacturing Company Limited

    Survey No.212/1,2&213 Pillaipakkam Village ,

    Sriperumbudur Taluk,

    Kanchipuram-602105

    Phone:+91-44-27107288

    Fax:+91-44-24337213

    E-mail:transformers@voltechgroup.com