Transformers with Vv - connection
Function
Transformers in the “V” configuration are used wherever it is necessary to supply a high-power single-phase load from a three-phase network without causing excessive load imbalance.
In a typical situation, connecting such a load directly between two phases results in significant loading of only two conductors and serious disturbance of the three-phase system balance.
The “V” configuration (sometimes referred to as “open-delta”) uses two transformers instead of three, connected at an appropriate angle to distribute the load more evenly across the supply network. Although the system still operates on two phases, its design reduces asymmetry and improves overall system stability.
- Ability to supply high-power single-phase loads from a three-phase network
- Significant reduction of phase load imbalance
- Improved network stability through more even current distribution
- Higher energy efficiency compared to direct phase-to-phase supply
- Space and cost savings — the configuration requires two transformers instead of three
- Simple and reliable design, particularly valued in continuous operation or high-load environments
- Marine industry
- Heavy industry
- High-power equipment requiring single-phase supply
- Installations highly sensitive to load imbalance
Typical application diagram
Custom Design
Manufacturing a transformer with parameters other than those specified in the catalogue is possible upon prior consultation.
Product code
Product for:
Details:
| Design | Transformers with V-connetion (changing number of phases 3 to 1) typu ET3V1 are produced in accordance with requirement of standards : EN/IEC 61558 or EN/IEC 60726 |
|---|---|
| Insulation class |
B(130oC) - standard up to 5 kVA; F(155oC) - standard above 5 kVA |
| Climatic class/Environmental class |
C1/E0 - land design; C2/E1 - maritime design |
| Ambient temperature | 40oC |
| Protection degree | IP 00 |
| Protection class | I |
| Frequency | 50/60 Hz |
| Primary voltage | up to 1000 V |
| Secondary voltage | up to 1000 V |
| Fastening | by means of angles |
Technical sketch
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| Standard design | |
Dimension table
Technical data of examples of transformers changing number of phases 3 to 1 type ET3V1
| Type of transformer | Power [kVA] |
Design | L [mm] |
B [mm] |
H [mm] |
d [mm] |
e [mm] |
f [mm] |
Weight [kg] |
|---|---|---|---|---|---|---|---|---|---|
| ET3V1 | 2,5 | 3x380V/1x42V/220V Vv0 | 300 | 155 | 337 | 240 | 120 | 11 x 15 | 30 |
| ET3V1 | 15 | 3x440-415-380V/1x15V Vv0 | 510 | 450 | 470 | 430 | 230 | 11 x 15 | 178 |
| ET3V1 | 25 | 3x480V1x120V Vv0 | 525 | 400 | 465 | 430 | 240 | 11 x 15 | 198 |
| ET3V1 | 56 | 3x480V/1x44V Vv0 | 690 | 530 | 555 | 590 | 271 | 11 x 15 | 451 |
Note:
Producent zastrzega sobie prawo wprowadzania zmian wynikających z ciągłego rozwoju oferowanych wyrobów.
Możliwe jest wykonanie transformatora w innej wersji i o innej mocy niż podano w tabeli po wcześniejszym uzgodnieniu.
Configuration of the housing determined according to individual customer needs. Please contact our sales department or fill out our inquiry form.
