Product Introduction
The 6 MVA traction rectifier transformer was delivered to South Africa in 2022 for Transnet’s 3 KV DC traction substations.
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 44kV 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.
Our 6 MVA traction rectifier transformer was designed with advanced technology and adopts high quality material and components which result in reliable quality and long operation time.
We ensure that each one of our delivered units has undergone rigorous full acceptance testing. We provide one-package service from consulting, quoting, manufacturing, installation, commissioning, training to after sale services, our products are now operating in more than 50 counties in the world. We aim to be your most reliable supplier as well as your best partner in business!
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
| Delivered to | South Africa |
| Year | 2022 |
| Model | ZSS-QY-6MVA-44/2*1.22+1.22KV |
| Type | Oil Immersed Rectifier Transformer |
| Standard | IEC60076 |
| Rated Power | 6 MVA |
| Frequency | 50 HZ |
| Phase | Three |
| Cooling Type | ONAN |
| Primary Voltage | 44 KV |
| Secondary Voltage | 2*1.22+1.22KV |
| Winding Material | Copper |
| Vector Group | Y/d11y0y0n |
| Impedance | ≥8 % |
| Tap Changer | NLTC |
| Tapping Range | ±2*2.5%@ primary |
| No Load Loss | 7700W |
| On Load Loss | 38000W |
6 MVA-44/2*1.22+1.22kV Transformer Drawing
6000 KVA rectifier transformer diagram drawing and size.
6 MVA-44/2*1.22+1.22kV Transformer Manufacturing Process
Transformer Construction of the Core:
Winding:
1.Our windings are made of high quality copper.
2.Both High Voltage (HV) and Low Voltage (LV) windings are done using Coil Winding Machines. The Copper strips/wires used in winding are meticulously selected for its quality to give the best output. The Copper strips/wires are paper covered and acts as insulators.
6 MVA Transformer Oil Tank
Final Assembly：
Finished 6 MVA Rectifier Transformer
6 MVA-44/2*1.22+1.22kV Transformer Name Plate
Customer was doing FAT in Our Factory
Packing and Delivery
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.
What is a “rectifier transformer”?
A rectifier transformer is used in applications dealing with DC voltages, such as in DC volt traction/metro industry. These transformers are specially designed and usually have more than 2 windings, for example, 1 Primary winding-Delta Connected and 2 Secondary windings- Delta and Star Connected with a Phase shift between the secondary -star and primary -delta. The output voltage of the secondary windings are specially designed to match the input to the Rectifiers (12 pulse Rectifiers), so that you get the desired DC output from the rectifiers.
FAQ
1.How soon can you delivery the transformer?
It depends on the quantity and capacity of the transformer, normally within one month since the date drawing confirmed by buyer.
2.How long can you provide the quality warranty?
12 months since the date transformer operated.
3.What payment method do you accept?
T/T (wire transfer), L/C both accepted.
