Sri Shanthaveera Transformers Manufacturing Company

• Bare Copper Strip
• Bare Copper Wire
• Double Paper Covered (DPC) Copper Strip
• Double Paper Covered (DPC) Copper Wire
• Multilayer Paper Covered (MPC) Copper Wire
• Enamelled Copper Strip
• Enamelled Copper Wire
• Varnish bonded double Glass Fibre Wound (DFGC) Copper Strip
• Varnish bonded double Glass Fibre Wound (DFGC) Copper Wire
• Enamelled + DFGC Covered Copper Strip
• Enamelled + Fibre Glass Tape Covered Copper Strip
• Nomex Paper Covered Copper Strip
• Bare Aluminium Strip
• Bare Aluminium Wire
• Double Paper Covered (DPC) Aluminium Strip
• Double Paper Covered (DPC) Aluminium Wire
• Enamelled Aluminium Strip
• Enamelled Aluminium Wire
• DFGC Aluminium Strip
• DFGC Aluminium Wire

Standard Distribution Transformer 15 KVA to 1000 KVA

STMC Make transformers are designed and tested as per IS : 2026, BS - 171, IEC - 76 & IEC - 726.

Vector Group

Transformers will be connected as per vector group reference Dyn 11. 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

Temperature Rise

STMC Make transformers are designed for a maximum temperature rise of 40/50 degree C of oil/winding. Lower temperature rise can be offered on request.

Core

The core is constructed from low loss, cold rolled, grain oriented, annealled lamination of electrical sheet steel conforming to the latest international standards. Special frame is built-in-house for clamping the core to reduce the magnetic noise as well as making the whole structure rigid and robust.

Windings

Coils are wound with electrolyte high conductivity paper covered or synthetic enamelled copper conductors. Cooling ducts are provided to keep the hot spot temperature as low as possible. Coils are dried in electric ovens. Rigid connection support and coil clamping is provided to ensure high shot circuit strength.

Insulation

Pre compressed board Senapathy Whiteley Board and Raman Board insulation paper of best quality is used.

Tapping

A. OFF CIRCUIT TAP CHANGING SWITCH Tappings from + 5% to - 5% in steps of 2.5% for HV variation or as per customer's requirement.
B. ON LOAD TAP CHANGER 16 steps OLTC for HV variation from + 5% to - 15% in steps of 1.25% or as per specific requirements. OLTC for remote/auto/parallel operation can also be offered.

Oil

Oil is tested for resistively, dielectric and acidic characteristic conforming to IS - 335. Before topping up oil is filtered thoroughly.

Tanks

The tanks are made of M.S. steel plates / sheets with adequate bracing & stiffness. Tanks are pressure tested to withstand any type of inside or outside pressure. All the external surfaces are given a primary coat of zinc chromate, red oxide and two finishing coats of grey paint. The inner surfaces are given a coat of heat and oil resisting paint

Quality Control and Routine Tests

All STMC make transformers undergo rigorous quality control checks and are routine tested as per IS in our fully equipped laboratory. Any specific test required by the customer can also be arranged.

Standard Fittings:

We manufacture Power Transformer are ranging from 5 to 1000 KVA upto 33 KV class. We have been fabricating quality power  transformer using premium quality raw material. Offering our customers arrange of durable, low maintenance transformers with a low noise level, we make sure that our product range is free from any kind of flaw. These power Transformers  are used to control power distribution to individual loads and offer security for load cables. Ensuring to provide best services in power sector, we give our customers the erection and maintenance of sub-stations to overcome the failure of transformers, switchgears or panels along with uninterrupted power supply.

Manufacturing a wide range of spun transmission line poles as per Govt ESCOMs Specification and as per customers specification.