The company stands tall among the successful Manufacturers, Suppliers and Exporters of OLTC Transformers. Our range of OLTC Transformers is used in paper mills, sugar mills, rolling mills, steel mills etc. Bulk orders of the Transformers are processed by us as per the specific requirements of the buyers. One can obtain it at nominal rates.

Range : 6.3KVA to 4000KVA

About Oltc Transformers :

On load tap Changer (OLTC) is used with higher capacity transformers where HT side voltage variation is frequent and a nearly constant LT voltage is required. OLTC is coupled with the transformer itself. Multiple tapings from HV windings are brought to the OLTC chamber and connected to fixed contacts. Moving contacts rotates with the help of rotating mechanism usually a Geneva mechanism having a spindle. The spindle can be rotated manually as well as electrically with a motor. Motor is connected in such a way that it can rotate in both the directions suhc as to rotate the OLTC moving contancts clockwise and anti clockwise. Two push buttons are fitted on the LCP (low control panel) to rotate the motor and hence the OLTC contacts. This movement of contacts thus controls the output LV voltage of the transformer. So rotating of the OLTC contacts with spindle or push button in this way is manual process. In case this process of rotating the OLTC contacts and hence controlling the LV side voltage is to be done automatically then a RTCC (remote tap changer controller) is installed with the transformer ht panel. The RTCC panel which has sensors which sense the output voltage and accordingly sends signal to LCP and LCP in turns rotates the motor as per signal received from the RTCC.

Applications :

• Chemical Plant, Botting Plant.

• Paper mills, Sugar mills, Rolling mills, Steel mills etc.

• Industries which rely heavily on automation, where electronic cards, PLC and VFDs are used in operations and acutation.

• Hospitals, Schools, Insitution etc.

We are a major Manufacturer and Supplier of a range of cutting-edge Distribution Transformers. Manufactured in compliance with IS 2026/1977, IS 1180/1989 or as per the requirements of the customers, our Distribution Transformers are designed to function effectively for a long time, without needing any maintenance. Testing of the Distribution Transformers is carried out according to IS 2026 and the following tests are done: Dynamic short circuit, impulse voltage tests and temperature rise test etc.

Availability

• Range : 6.3KVA to 4000KVA
• Vector Group : Connected as per reference DY 11 according to with International practices

Array Offered

• Distribution Transformer (Inner View)
• Distribution Transformer (2500 KVA 33 / .433 KV)
• Distribution Transformer (1000 KVA)
• Distribution Transformer (OLTC 2000 KVA)

Components

• Core
• Windings
• Tappings
• Oil
• Bushings
• Tank
• Clamp

Salient Features

• Excellent performance
• Robust design
• Inner and outer coating to resist corrosion and oil
• Hardwearing
• Minimum losses as per IS
• Resistant to short-circuiting
• 5 years warranty against manufacturing defect/flawed workmanship

Accessories Available

• Oil filling hole
• Oil drain valve
• Safety valve
• Standard thermometer
• Oil level gauge

• Skid wheel
• Jacking pad
• Breather
• Earthing terminal
• No load-type tap changer etc.

Optional Accessories (available at extra cost)

• Buchholz relay
• Cooling fan
• HV and LV cable box
• Cable duct
• Bus bar

• Duct, dial-type thermometer
• Oil level gauge
• On-load type tap changer
• Protective fuse
• Lightening arresters

Installation

• Indoors
• Outdoors
• Special designs/ installation as per request

Demanded for

• Industrial sector
• Commercial complexes
• Hospitals

Isolation /Ultra Isolation Transformer is manufactured by us as per IS: 2026 specifications and is made available in standard as well as customized models to serve the specific needs of the customers. Several shielding techniques in our Isolation /Ultra Isolation Transformer effectively reduce interwinding capacitance to less than 0.005 Pico farad and causes an increase in D.C. Isolation up to 1000 Mega ohms.

Range : 6.3KVA to 4000KVA

Types of Low impedance paths for passing noises to secondary and vice-versa

• The high value of coupling capacitance
• The maximum linkage of magnetic field
• The leakage current
• Static transfer of electric noises

Why Our Isolation /Ultra Isolation Transformer?

• Total isolation of primary from secondary circuit
• Provides perfect neutral
• Sturdy construction
• Long running time
• Easy to maintain
• Accurate performance

Effective for

• Isolating sensitive equipment from
  • Line voltage transients
  • Spikes and surges
  • D.C. leakage etc.
• Preventing disturbances generated by noisy equipment load

Specially Designed For

• Computers and peripherals
• Medical instrumentation
• Digital communication telemetry systems
• CNC Machines

We offer a wide range of Induction Furnace Transformer, which is manufactured in accordance with IS: 2026 specifications. Manufactured using superior quality components and latest techniques, the Induction Induction Furnace Transformer features electrostatic shielding between the primary and secondary winding to avoid problems of earth fault tripping. Required for arc furnaces and induction furnaces, the performance of the Induction Induction Furnace Transformer has made us a reputable Manufacturer and Supplier in the industry.

Range : - 6.3KVA to 4000KVA

Capacity

• 3 MVA up to 33 KV class

Key features

• Sturdy construction
• Powerful performance
• Resistant to short-circuiting
• Optimu7m insulations
• Easy installation
• Minimum maintenance

Demanded by

• Rolling Mills
• Forging units
• Steel plants
• Aluminium industry
• Gas industry and many more

We are bracketed among the trusted Manufacturers, Suppliers and Exporters of Type Test Transformers. The Transformers we make available are highly efficient and are highly energy saver. Our Transformers undergo various quality-tests before the final dispatch of the Transformers. Bulk orders of the Transformers are processed by us as per the specific requirements of the buyers.

Type Test Transformers :

These are our range of distribution transformers which are type tested from ERDA. We have various approved ratings of our different transformers. Such as we have 3 and 4 Star rating respectively approved for our 16, 25, 100, 200 KVAtransformers.l

The transformers besides routine testing undergoes type test in which following test are done :

• Lightening Impulse Test

• Short Circuit Test

• Temperature Rise Test

• Air Pressure Test

• Vacuum Test

• Magnetic Balance Test

• Permissible Flux Density and Overfluxing test

These Transformers are highly efficient and are highly energy saver. They have fairly low losses. GTB is approved supplier of various state electricity boards such as PSPCL, HPSEB etc. We participate in tenders of star rated transformers and also participate for repair tenders of state Electricity boards