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144188195215245280

Vijai Electricals Limited

Haridwar, Uttarakhand

| GST  05AAACV7259B1ZI

| Verified Supplier

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Pioneering leadership, remarkable vision, strong customer focus and a relentless commitment to quality and innovation have made Vijai Electrical Ltd. one of the largest and leading manufacturer-exporters of Power and Distribution Transformers up to 15 MVA, 66 kV class in India with a turnover (2008-2009) of around US $ 302 Million. Today, with more than three decades of continuous progress behind it, Vijai has crossed many historical landmarks and grown into a progressive global Organization. It was a benchmark for the organization when it plunged in to the manufacturing of Extra High Voltage Power Transformer with technical Collaboration from M/s Daihen Corporation, Japan up to 500MVA, 500 kV class for Generation and Transmission needs of the country. The organization has also diversified into the manufacture of Switchgear products like 12KV Indoor /Outdoor VCBs, and 36KV Outdoor VCBs, Instrument transformers of both medium and EHV and SF6 Breakers up to 420KV. We are also scheduling to manufacture in India, Gas Insulated Switchgear up to 420KV and we will perhaps be the only Industry in India to do so. Ever since its foundation in 1973, Vijai has made an impact in the industry and its products have been inspected and accepted by several internationally reputed third-party Inspection Agencies like Lloyds-UK, Crown Agents- UK, BSI Inspectorate Griffith -UK, Bureau Veritas, OMIC Japan, CAPE- Thailand, Societe Generale de Surveillance (S.G.S), Tubescope Vecto GmbH - Germany, Robert W. Hunt Organization, RITES, AT Survey & Inspection Company ?Bangladesh and so on.+ Read More

Nature of Business

Manufacturer

Legal Status of Firm

Public Limited Company

GST Number

05AAACV7259B1ZI

Single Phase Oil Filled Distribution Transformers
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features and benefits :

  • robust construction having excellent short circuit and thermal withstand capabilities.
  • proven technology, effectively improving the quality and reliability of the electrical distribution system
  • computer aided design (cad) and vijai’s design software systems
  • ability to meet customized design and specification demands
  • after sales maintenance and spare parts service
  • round tank for aesthetic appearance
  • powder coated tank body – excellent finish (optional)

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Three Phase Distribution Transformers
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standard fittings :

  • pole mounting brackets/tanks base channels
  • lifting lugs
  • tank grounding provision
  • rating and diagram plate
  • primary bushings
  • secondary bushings

optional fittings :

  • lightening arrester
  • conservator
  • hv/lv cable box, bus duct
  • oil temperature indicator
  • buchholz relay (for ratings above 1000 kva)
  • pressure relief device / explosion vent
  • terminal connectors
  • tap changer
  • arcing horns
  • cable terminations

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Small Power Transformers
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Small Power Transformers

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standard fittings :

  • lifting lugs
  • skid base / roller arrangement
  • rating and diagram plate
  • primary bushings
  • secondary bushings
  • oil level guage
  • silica gel breather
  • drain / filter valves
  • thermometer
  • pressure relief device / explosion vent

optional fittings :

  • terminal connectors
  • magnetic level guage
  • oil temperature indicator
  • winding temperature indicator
  • buchholz relay
  • rtcc panel
  • condenser type bushing for voltage class of 33 kv & 66 kv
  • off circuit tap switch / onload tap changer

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Completely Self Protected Transformers
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benefits :

  • higher transformer availability : available for a longer duration than conventional transformers. Internal breaker (type clr) is tripped by a standard bi-metallic thermal trip element, which integrates oil temperature and secondary current flow, allowing the transformer to continue to operate even under overload conditions, until the oil temperature makes coil damage imminent. Improvised cqr type breakers can also be provided which are furnished with instantaneous magnetic trip element in addition to the bi-metallic thermal trip element.
  • more reliable service : csp transformers efficiently and effectively disconnect the load from the transformer under overload conditions. Moreover csp components help in identifying locations where improvements in load management may be necessary.
  • lower system cost : considering the operating costs of energy supply and replacement cost of the transformers that have failed prematurely due to overload. Csp transformers would no doubt fair better than conventional ones.
  • easier an simpler installation : involves only one piece of electrical equipment, the transformer and only one high voltage electrical connection to the distribution line.

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Corrugated Tank Transformers
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Advantages :

  • Compact in size : Transformers with corrugated walls are smaller than transformers with radiators.
  • Improved heat dissipation : the role of fins is to increase the surface of the tank, which is in contact with the cooling air. Due to the temperature rise of the windings under load, the oil temperature also rises. The hot oil rises, meets the top cover and goes down into the fins where it is cooled by the air rising up between the fins. Required heat dissipation can be achieved by varying no. of corrugations and the depths height of corrugations Elegant appearance.
  • Due to vertical oil channel greater stability is achieved.

    The fins have sufficient degree of elasticity to absorb the expansion in volume of the liquid, due to the heating of cooling medium, at the same time providing a large dissipating surface to cool the same cooling medium.

    No blockage of oil flow into the fins : Blockage of oil is possible in pressed steel type radiators due to possible closing of header pipe connection on the tank wall, unlike Corrugated tanks.

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Dry Type Cast Resin Transformers
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application

in service in diverse industries, electricity boards, nuclear / thermal / hydel power plants, railway traction and high-rise buildings, hospitals, subways, underground vaults, tunnels, school, steel factories, chemical plants, etc. Where safety is of prime concern.

  • precise casting under vacuum ensures extremely low levels of partial discharge.
  • coils have smooth finish and are robust in construction.
  • vijai successfully conducted seismic qualification test on cast resin transformers supplied to nuclear power installations in india, way back in 1994.

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Pad Mounted Transformers
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Pad Mounted Transformers

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Applications

Industrial, Commercial, Institutional and Residential areas. Indoor Installations like Cellars, Malls, Complexes where safety is of prime concern.

Benefits :

  • Robust quality systems ensure implementation of the best design and manufacturing practices.
  • Flexibility in designing transformers to exacting customer requirements (optimum cost).
  • Competitive delivery schedules.
  • Best insulation and sealing systems.
  • Compliance to International Standards like ANSI, IEEE, etc.

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Delta Core Transformer
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Delta Core Transformer

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salient features :

  • lower noise level in the core due to minimized air gaps in the core.
  • reduction in no load current as compared to the conventional stacked type.
  • rugged and robust construction.
  • compact in size and available in round / hexagonal tank versions.
  • relatively easy to install.

standard fittings :

  • pole mounting brackets / tank base channels.
  • lifting lugs
  • tank grounding provision
  • rating and diagram plate
  • primary bushings & secondary bushings.

optional fittings :

  • lighting arrester
  • conservator
  • hv/lv cable box, bus duct
  • oil temperature indicator
  • winding temperature indicator
  • pressure relief device / explosion vent
  • terminal connectors
  • tap changer
  • arcing horns

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Medium Voltage Vacuum Switchgear
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salient features :

  • mechanism matching vi performance of m2 class
  • factory assembled, ready to install.
  • compact size
  • motor wound spring charged mechanism with charging time of <10 sec.
  • mechanism suitable for fast auto reclosing duty.
  • manual spring charging facility
  • available optionally with 2 trip coils
  • series trip coil.

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Medium Voltage Gas Insulated Switchgear
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salient features :

  • only very small space is required as compared to conventional air insulated switchgear
  • minimum maintenance
  • three phases enclosed in tubular mild steel enclosures
  • vacuum interrupters are in triangular formation
  • plug in type cable terminations
  • modular construction
  • integral earthing
  • hermetically seated enclosures
  • separate panel for busbar earthing and voltage transformers
  • conventional epoxy resin instrument transformers.
  • motor/manual operated disconnectors
  • compatible to remote operation.
  • full safety to operator
  • mechanism is of m2 class
  • motor wound spring charged mechanism with charging time of < 10 sec
  • manual spring charging facility

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Medium Voltage Current Transformers
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salient features :

  • oil impregnated paper insulation
  • accuracy class, output & number of secondary windings as desired
  • graded insulation for primary
  • hermetically sealed
  • technical parameters

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Medium Voltage Transformers
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salient features :

  • oil impregnated paper insulation
  • accuracy class, output & number of secondary windings as desired
  • single primary winding
  • hermetically sealed

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Circuit Breakers
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Circuit Breakers

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Salient Features :

  • Simplicity, higher reliability and safety of design
  • Hybrid interrupter design for 145 kV breaker and improvised puffer type interrupter for 245 kV breaker
  • Reduced operating mechanism energy requirement
  • Small amount of SF6 gas
  • Rotary seals
  • Minimum maintenance, servicing and installation time
  • Higher mechanical endurance and very low probability of re-striking
  • Conform to class M2 & C2
  • Compact and reliable hydro-spring mechanism

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Ehv Current Transformers
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Ehv Current Transformers

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salient features :

  • oil impregnated paper insulation
  • accuracy class, output & number of secondary windings as desired
  • graded insulation for primary
  • hermetically sealed with n2 cushion

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Ehv Voltage Transformers
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Ehv Voltage Transformers

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salient features :

  • oil impregnated paper insulation
  • accuracy class, output & number of secondary windings as desired
  • single primary winding upto 145 kv and 2 stage primary windings in cascade for 245 kv
  • hermetically sealed with n2 cushion

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Medium Voltage Vacuum Switchgear
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Ehv Current Transformers

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Ehv Power Transformers

Ehv Power Transformers

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Lt Oil Immersed Circuit Breaker
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With a commitment to continuous improvement, paving a way for vertical integration, the Research & Development wing of Vijai has been painstakingly working round-the-clock to develop new products, better and improvised manufacturing processes, usage of modern technology and enhanced materials for the benefit of customers. This would prove not only economical in terms of cost and energy but would also give an all time superior product to provide total satisfaction to the end user. Continuous Magnetic Field Annealing and Delta Core Transformers, the patented technologies of Vijai are steps in this direction.

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Medium Voltage Vcb Kiosk
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Medium Voltage Vcb Kiosk

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  • totally enclosed simple in construction and easy to operate
  • vcb can be fixed (or) draw out type
  • mechanism matching vi performance of m2 class (10,000) operations
  • vts/pts and relay control panel are inbuilt
  • power supply can be taken through roof bushing (or) cable box (or) combination of both
  • minimum maintenance
  • enclosure tested for ip55
  • motor wound spring charged mechanism with charging time of <10 sec
  • mechanism suitable for fast auto reclosing duty
  • series trip coil

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Vacuum Interrupters
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Vacuum Interrupters

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Rated Voltage
Rated Current
Insulation Level
Power frequency withstand voltage
Impulse withstand voltage
Rated short time withstand current
Rated short circuit breaking current
Rated duration of short circuit
Rated operating duty circle
Contact Life
Mechanical
At load Current
At full short circuit

Up to 36 kV rms
Up to 2500 A

Up to 70 kV rms
Up to 170 kV peak
Up to 40 kA rms
Up to 40 kA rms
3 sec
O-0.3 sec-CO-3min-CO

30,000 operations
20,000-30,000 operations
100 operations

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Aluminium Conductors
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Aluminium Conductors

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all-aluminuim conductors are the most favoured type for use in the construction of relatively short span distribution schemes and are in common use on lines for voltage up to 60 kv.
another frequent application for all-aluminium conductor is in flexible busbar connections.
although aluminium-to-copper connections can be made, it is better to use aluminium conductors for service connections, as various forms of covered cable being available for this purpose.
the data sheets show the most common sizes of conductors but other sizes, to any recognized standards or customer specification can also be supplied.
aac insulated with xlpe or pvc can be supplied as per the customers’ requirement.
aac are used primarily for overhead transmission and primary and secondary distribution, where ampacitymust be maintained and a lighter conductor (compared to acsr) is desired, when conductor strength is not a critical factor.
aac can also are used primarily as bus, apparatus connectors and jumpers, where additional flexibility is required.

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Aerial Bunch Cables
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Aerial Bunch Cables

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aerial bunch cables are basically a compromise construction between power cables and overheadconductors. Though the concept is not very new, but of late its use is increasing all over the world.
the basic construction is as follows
3 power cores consisting of standard aluminium conductors, insulated with xlpe insulation
+
one sheath lighting aluminium conductor with xlpe insulation (optional)
+
one messenger al-alloy conductor (bare or covered)
the purpose of messenger wire is
a) it acts as load bearing wire.
b) it acts as earth or neutral conductor.

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Mvt01

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Vacuum Interrupters

Vacuum Interrupters

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Vacuum Interrupters

Vacuum Interrupters

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Lt Oil Immersed Circuit Breaker
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