Product Introduction
This 5 units of 2.5 MVA three phase transformer was delivered to a substation in South Africa in 2014. The rated power of the transformer is 2500 KVA. The primary voltage of the transformer is 11KV and secondary voltage is 0.55KV. The connection of high voltage is Delta, and low voltage is Star. The radiators adopted hot dip galvanized technology to prevent it from corrosion under heavy polluted area. The 2.5 MVA distribution transformer was designed with advanced technology and adopts high quality material and components which result in reliable quality and long operation time.
SCOTECH ensure each one of our delivered transformers had passed the full acceptance test and we remains 0 fault rate record for more than 10 years so far, our oil immersed power transformer is designed in accordance with IEC, ANSI and other major international standards.
Scope of Supply
Product: Oil Immersed distribution Transformer
Rated Power: Up to 5000 KVA
Primary Voltage: Up to 35 KV
Technical Specification
2.5 MVA distribution transformer specification oil capacity and data sheet
| Delivered to | South Africa |
| Year | 2014 |
| Model | S11-2.5 MVA-11/0.55KV |
| Type | Oil Immersed distribution Transformer |
| Standard | IEC60076 |
| Rated Power | 2.5 MVA |
| Frequency | 50 HZ |
| Phase | Three |
| Cooling Type | ONAN |
| Primary Voltage | 11 KV |
| Secondary Voltage | 0.55 KV |
| Winding Material | Copper |
| Vector Group | Dyn11 |
| Impedance | 6.5% |
| Tap Changer | NLTC |
| Tapping Range | ±2*2.5% |
| No Load Loss | 2.4 KW |
| On Load Loss | 19.6 KW |
| Accessories | Standard Configuration |
| Remarks | N/A |
General Arrangement Drawing
2.5 MVA transformer dimensions and weight details
2.5 MVA 11/0.55KV Transformer Manufacturing
Type of distribution transformer：
1、Mounting location – pole, pad, underground vault
2、Type of insulation – liquid-immersed or dry-type
3、Number of phases – single-phase or three-phase
4、Voltage class
5、Basic impulse insulation level (BIL).
Finished 2.5MVA 11/0.55KV Transformer
The functions of OLTC transformer：
1. Load ratio voltage regulation, high reliability, advanced performance, reasonable economic index, core slot is three-stage ladder shape,
2. The core surface is coated with curing coating to reduce loss and noise.
3. The winding structure is novel and the oil circuit design is reasonable. The newly designed insulation structure improves the mechanical strength and short-circuit resistance.
4. There are two types of tanks: totally enclosed and with oil retainers.
2.5 MVA 11/0.55KV Transformer Testing
Packing and Delivery
Installation Commissioning and Operation
FAQ
1. What standard do you follow?
IEC 60076 standard, and all other major international standard such as ANSI, CSA, UL, etc.
2. What package do you have for transformers?
Standard package with welded iron frame packed with ply wood boxes.
3. How long can I receive my transformers?
The shipping time from our port (shanghai or Ningbo) to your port is range from one week to one month, depend on the distance.
