Product Introduction
The 20 MVA power transformer was exported to a substation in South Africa in 2015 , the capacity of the transformer is 20000 KVA, the HV of this power transformer is 132KV and LV is 11KV. This oil immersed transformer is equipped with an Huaming brand on load tap changer(OLTC) at 132KV side to regulate the HV automatically. The 20 MVA power transformer was designed in advanced technology and adopts high quality material and components which result in reliable quality and long operation time. The witness factory acceptance test of the transformer was approved by the end user, all the test data was qualified with the standards and our design.
Scope of Supply
Product: Oil Immersed Power Transformer
Rated Power: Up to 200 MVA
Primary Voltage: Up to 230 KV
Technical Data Sheet
20 MVA transformer specification and data sheet
| Delivered to | South Africa |
| Year | 2015 |
| Model | SZ11-20 MVA-132/11KV |
| Type | Oil Immersed Power Transformer |
| Standard | IEC60076 |
| Rated Power | 20 MVA |
| Frequency | 50 HZ |
| Phase | Three |
| Cooling Type | ONAN |
| Primary Voltage | 132 KV |
| Secondary Voltage | 11 KV |
| Winding Material | Copper |
| Vector Group | YNd1 |
| Impedance | 11% |
| Tap Changer | OLTC |
| Tapping Range | 132+4/-12*1.25% |
| No Load Loss | 21 KW |
| On Load Loss | 112.5 KW |
| Accessories | Standard Configuration |
| Remarks | N/A |
Lay out Drawing
20 MVA 132/11KV Transformer Manufacturing
Completed 20MVA 132/11KV Transformer
Transformer in our work shop
Name Plate
20 MVA transformer nameplate details
20 MVA 132/11KV Transformer Testing (Customer FAT)
With end user
Packing and Delivery
The transformer main body was transport with oil, the radiators and conservator were dismantled and packed in ply wood boxes during transport to prevent it from damage during sea. The transformer main body was loaded in a 20 feet FR container due to the over size of the width and weight.
Installation Commissioning and Operation
SCOTECH sent our team to the user’s site to do the installation and commissioning in 2015
Detail address: Bronkhorstspruit, GP, 1021, Johannesburg, South Africa.
Detail Coordinate: -25.69903, 28.68693
Altitude: 1466.58M
With customer
Installation completed
Transformer control room
The 20 MVA transformer substation overview
What is on-load tap changer for transformers?
On-load tap changer (OLTC), also known as On-circuit tap changer (OCTC),
The purpose of a tap changer is to regulate the output voltage of a transformer. It does this by altering the number of turns in one winding and thereby changing the turns ratio of the transformer. There are two types of transformer tap changers: an on-load tap changer (OLTC) and no-load tap changer (NLTC), Not all of the transformers are equipped with tap changer.
FAQ
1. What is the scope of your supply?
We can supply distribution transformers up to 5000KVA 35KV, power transformers up to 200 MVA 230KV, dry type transformers up to 10 MVA 35KV, and other special transformers such as rectifier transformer and furnace transformers.
2. What service can you provide?
We can provide design, manufacturing, delivery, installation, commissioning, after-sale service.
3. Can I visit your company?
You are welcomed to visit our company at any time, contact us to get start the journey.
