Transnet's traction substations consist of single and double units and in exceptional cases a three unit rectifier configurations.

Each rectifier unit comprises of a set of high voltage AC disconnects, primary circuit breaker, two current transformers and a traction transformer connected for twelve-pulse rectification with its control and protection circuitry.

The rated power of the transformer is 6000 kVA with ONAN cooling, the primary voltage is 22 kV with ±2*2.5% tapping range(NLTC), the secondary voltage is 2 of 1.22 kV, also a tertiary winding is designed to supply a auxiliary 150 KVA 1.22 KV power, they formed a vector group of Y/d11y0y0n.

Scope of Supply

Product: Oil Immersed Rectifier Transformer

Rated Power: Up to 100 MVA

Primary Voltage: Up to 110 KV

The transformer can be designed according to customer’s requirements

Technical Data Sheet

6 MVA oil immersed rectifier transformer specifications and data sheet

6 MVA-22/2*1.22+1.22kV Transformer Manufacturing Process

Transformer Construction of the Core:

In general, the name associated with the transformer structure depends on how the primary and secondary windings are wound on the center laminated steel core. The two most common and basic designs of transformer structure are closed core transformer and shell core transformer.

Packing attention

Special attention shall be paid to the loading of the transformer when loading: due to the concentrated weight of the transformer, the concentrated load at the bottom of the ship shall be guaranteed when considering the barge to be carried, and reinforcement measures shall be taken if necessary; the bumping wave of the ship shall be taken into consideration in water transportation, and the binding must be firm.

Working Of A Rectifier Transformer

A transformer consisting of two diodes or thyristors is installed in the same tank to regulate the voltage. It is designed to combat eddy current and harmonic problems. It is possible to achieve fine level voltage regulation, and the device is called rectifier transformer, where the regulating unit can be built internally or separately. The device is suitable for high voltage applications.

Many applications require special industrial transformers because existing equipment cannot withstand the load of such applications. It provides the necessary power for the low-voltage power supply and will not cause any problems or damage. They are used in different applications, such as mining, electric furnace, laboratory experiments, variable speed drive motor control, etc.