Transformers

Substations and power distribution areas use oil-immersed transformers. An oil-immersed transformer is similar in design to a regular transformer. It’s made up of three main parts: a magnetic core at the center that is surrounded by coils and bushings.

The magnetic core and windings create a magnetic field, allowing the current to pass through. Windings are insulated, with higher voltages needing thicker insulation. Bushings transmit the electricity to its next destination, typically a substation.

Oil-filled transformers change a current to a higher or lower voltage using the principle of induction. This process creates a surplus of heat. The oil helps to keep the transformer from overheating.

The windings and core are submerged in transformer oil. It acts as a cooling agent and an insulator. Convection moves the oil through the windings, coils, and core, keeping the transformer from overheating. Oil is further cooled externally at lower voltage and in an air-cooled radiator with higher voltages.

Types of Oil-Filled Transformers

There are several types of oil-filled transformers. Here are a few of the most common below.

Single-phase transformers use one pair of windings. It’s used in lower-load situations, such as rural areas.
Three-phase transformers are made up of three pairs of windings. The windings typically go around a core sectioned into three parts. Three-phase transformers are used in higher-load areas and can supply three circuits with energy.
Power transformers are designed to handle much higher loads. They can step voltages up or down and transmit a current from one place to another.
Distribution transformers transmit lower voltages from the electrical grid to homes and businesses. They are much smaller than power transformers.
Pole-mounted transformers are connected to an electrical pole.
Pad-mounted transformers are mounted to a concrete pad on the ground.
Application: For distribution substation
Standards: IEC 60076-1, IEC 60076-2, IEC 60076-3, IEC60076-4, IEC60076-5 Etc.
Parameters: 50/60Hz up to 35kV 50- 5000kVA
Features:

Oil Filled Transformers

Rectifier transformers are associated with very high secondary currents encompassed with huge harmonic content caused by semiconductors devices connected to transformer.

The rectifier transformer is acting as link between the grid and the AC to DC converters. Application of rectifier transformer is to provide required number of phases, voltage shifts needed to realize the conversion and to adjust the rectifier input to vary the DC output voltage. Rectifier transformer is generally used in various applications such as electrolysis process, aluminium smelting, graphitizing etc.

We design rectifier transformer is used as link between the grid and the AC to DC converters. Application of rectifier transformer is to provide required number of phases, voltage shifts needed to realize the conversion and to adjust the rectifier input to vary the DC output voltage. Rectifier transformer is generally used in various applications such as electrolysis process, aluminium smelting, graphitizing etc.

To do it, the rectifier transformer is often coupled with components as regulating transformers (or autotransformers), saturable reactors and interphase transformers. All these components may be assembled in one or in separate tanks for transportation optimization and site restrictions.

Rectifier transformers face high operating currents combined with a huge amount of harmonic content due to the distorted waveform caused by the semiconductor converters connected to the transformer.

Typical applications are for: DC arc furnaces, electrolysis, scrap melting furnaces, aluminum smelter, graphitising furnaces, traction substations, metal refining and inverters for variable speed drives.

Product Scope

Rated power up to 25 MVA
L.V. current up to 150 kA

Rectifier Transformers

Epoxy Resin Cast Dry-type Transformer

Application: for power distribution system and large industrial enterprises, etc.

Standards: IEC 60076-11

Parameters: Rated Voltage: 10kV-35kV.
Rated Capacity: 30-20000kVA.

Features: 1.High security and reliability in operation.
2.Economic and efficient to reduce network loss and working cost.
3.Low temperature rise.
4.Low noise.
5.Operation in moist place with high moisture-proof capability.
6.Customized transformers are available on your requirement.

Dry Type Transformers

Current Transformer

Oil Current Transformer

Application: For high-rise buildings, urban and rural buildings, residential areas and temporary construction electricity and other places, this is
used for receiving and distributing network energy.
Standards: IEC 62271-202
Parameters: High voltage range: 3.6-24kV, low voltage: 0.4kV.
Features: Small size, light weight, easy to transport.
High mechanical strength and short circuit resistance, good thermal stability, high reliability, long service life.
High efficiency, low noise.
Excellent heat dissipation and moisture resistance.

Cast Resin Current Transformer (Outdoor)

Application: for power ,current measurement and relay protection in voltage up to 35kV AC 50/60Hz power system.

Standards: IEC 60044-1

Ratings: 24kV

Features: 1.Reliable operation.
2.Reliable insulation capability.
3.High measurement accuracy.
4.Reliable current-carrying capability.
5.Maintenance-free.

Factory-built MV/LV substation assemblies meet users' needs with respect to reliability, safety, overall quality, time-savings and appropriateness for the local surroundings (climatic conditions, operating mode, architectural requirements...)

2mm thick painted GI enclosure mounted on a hot dip galvanized 4mm thick GI base.

Partitions between compartments with 2mm thick GI sheet.

Gasket/ Stiffners provided as required. Internal lighting facility provided

Application: For high-rise buildings, urban and rural buildings, residential areas and temporary construction electricity and other places, this is
used for receiving and distributing network energy.
Standards: IEC 62271-202
Parameters: High voltage range: 3.6-24kV, low voltage: 0.4kV.
Features: Small size, light weight, easy to transport.
High mechanical strength and short circuit resistance, good thermal stability, high reliability, long service life.
High efficiency, low noise.
Excellent heat dissipation and moisture resistance.

Pre fabricated Substation

Potential Transformer

OutDoor Potential Transformer

Application: for voltage and power measurements, and relay protection in voltage up to 35kV

50/60Hz power system and for panel builders.

Standards: IEC 60044-2

Ratings: 35kV

Features: 1.Reliable operation.
2.Reliable insulation capability.
3.High measurement accuracy.
4.Maintenance-free.
5.Reliable sealing performance

InDoor Potential Transformer