What is an 11kV Transformer?
An 11 kV transformer refers to a transformer whose rated voltage includes the 11 kV side. It can serve as either the high-voltage side (e.g., 11/0.4 kV) or the low-voltage side (e.g., 33/11 kV).
However, in distribution applications, it most commonly refers to a distribution transformer used on the high-voltage side, stepping down from 11 kV to a lower distribution voltage level, such as 400 V or 230 V for direct supply to end users.
OMEK Power 11kV Transformer Details
✅ Input Voltages (Primary): 11KV
✅ Output Voltages (Secondary): 440V / 433V / 415V / 400V / 240V / 230V / 110V (Three-Phase / Single-Phase).
✅ Common Vector Group: Dyn11, Yyn0, Yzn11
✅ Winding material: Copper winding – both primary and secondary sides are copper materials
✅ Energy Efficiency: Standards for low no-load and load losses in compliance with IEC standards
11kV 415V Three Phase Dry Type Amorphous Alloy Transformer Specification
| Rated capacity (kVA) | Voltage combination | Conn- ected group label | No-load loss (W) | Load loss(W) | No-load current (%) | Impe- dance voltage (%) | Sound Level (dB) | Overall dimension (L×w×h) | Total weight (kg) | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| High voltage (kV) | tap range | Low Voltage (kV) | 130℃(B) 100℃ | 155℃(F) 120℃ | 180℃(H) 145℃ | ||||||||
| 30 | 11 | ±2×2.5 ±5 | 0.4 | Dyn11 | 50 | 605 | 640 | 685 | 0.6 | 4.0 | 63 | 900×900×800 | 300 |
| 50 | 60 | 845 | 900 | 965 | 0.5 | 955×900×900 | 350 | ||||||
| 80 | 85 | 1160 | 1240 | 1330 | 65 | 985×950×960 | 400 | ||||||
| 100 | 90 | 1330 | 1415 | 1500 | 1035×1250×980 | 450 | |||||||
| 125 | 105 | 1565 | 1665 | 1780 | 0.4 | 66 | 1060×1280×1000 | 500 | |||||
| 160 | 120 | 1800 | 1915 | 2050 | 1120×1320×1050 | 680 | |||||||
| 200 | 140 | 2135 | 2275 | 2440 | 67 | 1135×1330×1105 | 770 | ||||||
| 250 | 160 | 2330 | 2485 | 2665 | 1170×1330×1165 | 900 | |||||||
| 315 | 195 | 2945 | 3125 | 3355 | 0.3 | 69 | 1185×1360×1225 | 1010 | |||||
| 400 | 215 | 3375 | 3590 | 3850 | 1210×1380×1300 | 1205 | |||||||
| 500 | 250 | 4130 | 4390 | 4705 | 70 | 1245×1400×1380 | 1400 | ||||||
| 630 | 295 | 4975 | 5290 | 5660 | 71 | 1295×1410×1355 | 1515 | ||||||
| 630 | 290 | 5050 | 5365 | 5760 | 0.3 | 6.0 | 71 | 1295×1410×1355 | 1515 | ||||
| 800 | 335 | 5895 | 6265 | 6715 | 72 | 1375×1450×1480 | 1880 | ||||||
| 1000 | 385 | 6885 | 7315 | 7885 | 0.2 | 1430×1480×1525 | 2170 | ||||||
| 1250 | 455 | 8190 | 8720 | 9335 | 74 | 1480×1500×1570 | 2525 | ||||||
| 1600 | 530 | 9945 | 10555 | 11320 | 75 | 1500×1520×1710 | 2980 | ||||||
| 2000 | 700 | 12240 | 13005 | 14005 | 77 | 1570×1550×1735 | 3480 | ||||||
| 2500 | 840 | 14535 | 15445 | 16605 | 78 | 1625×1600×1825 | 4080 | ||||||
OMEK Power 11kV Distribution Transformer
OMEK Power (Jinan Omek Electric Power Co., Ltd.) specializes in manufacturing dry type and oil-immersed transformers, providing customized power distribution solutions for you.
Each power distribution project is unique. Within the 11 kV voltage level, OMEK Power can provide either dry-type or oil-immersed transformers tailored to your project requirements. We also can design a 11kV transformer with pole-mounted, enclosure-mounted, or substation installation solutions.
11kV Transformer Parts
Here is OMEK Power’s 11kV substation transformer of dry type. This annotated parts diagram clearly shows the key parts for your reference.
11kV Transformer Available Configurations
Available Secondary Voltages for 11kV Transformers
With flexible voltage configurations, OMEK Power 11kV transformers can deliver a wide range of low-voltage outputs. Below outputs are what we can supply for your projects. Flexible compatibility with your local grid standards and application requirements!
✅ 11kv to 400v transformer
✅ 11kv to 440v transformer
✅ 11kv to 415v transformer
✅ 11kv to 230v transformer
✅ 11kv to 240v transformer
✅ 11kv/110v voltage transformer
✅ 11kv 433v distribution transformer
OMEK Power 11kv transformer available Ratings
OMEK Power supplies 11kV transformers with diverse power ratings to satisfy different power distribution demands. Our available capacity ranges cover from 100kVA up to 10MVA, including:
◉ 100kVA ◉ 200kVA ◉ 315kVA ◉ 400kVA ◉ 630kVA ◉ 1000kVA ◉ 1250kVA ◉ 1600kVA ◉ 5MVA ◉ 10MVA
11kv transformer maintenance
The 11kv transformer is an important component of the urban distribution network. During its long-term operation, it continuously withstands the combined effects of electrical, thermal, mechanical and environmental stresses.
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FAQs
Have any questions? We’re here to help you out.
There are distinct discrepancies between 11kV and 33kV power transformers in working voltage level and application scenario, etc.
| Comparison Item | 11kV Transformer | 33kV Transformer |
|---|---|---|
| Voltage Level | Medium low voltage grade | Medium high voltage grade |
| Application Scope | Urban & rural power distribution, factory power supply | Regional power transmission, main substation power conversion |
| Power Capacity | Small to medium capacity | Medium to large capacity |
| Installation Place | Indoor distribution room, box substation | Outdoor substation, remote power station |
| Cost & Size | Compact structure, lower cost | Bigger volume, higher manufacturing cost |
| Transmission Distance | Short distance power supply | Long distance power delivery |
We supply step down transformer 33kV to 11kV, covering mainstream specifications including 10 MVA 33 11kV transformer and 33 11kV transformer. Besides 33kv to 11kv transformer for voltage reduction, 11kv to 33kv transformer is also available to boost voltage for long-distance power transmission.
11kV transformers are mostly applied in regional distribution network, while 33kV series serve high-level power transmission and voltage conversion between two voltage classes.
When selecting a 11kV transformer, it is necessary to know the capacity, load characteristics, whether on-load voltage regulation is required, installation environment, short-circuit impedance and loss indicators.
If it is used for industrial loads, special attention should be paid to start-up impact, voltage fluctuations and long-term overload capacity.
If it is a distribution project, it is also necessary to confirm whether the 11 kV in the system is on the high-voltage side or the medium-voltage side, as this directly determines the required transformer voltage ratio.
For instance, a certain distribution substation reduces the 33 kV power grid to 11 kV, and then further reduces it from 11 kV to 0.4 kV for the use of equipment and lighting in the factory area. This two-level distribution is very common in many regions. Understanding the role of the 11kV network helps select the right transformer for actual power distribution requirements.