Three-phase Converter Transformers

Transformers are designed for use with thyristor converters.
In standard design, the transformers are adjusted to fastening by means of a base welded into core or screwed angles.
If agreed, the transformers may have more tappings. The windings terminals may be placed on one side only, or on both sides of a transformer. Upon request, the transformers may be assembled in enclosures with the protection degree of IP 23, IP 44 and IP 54 with the possibility to insert supply cables through glands.

Product for:


Design Three-phase converter transformers ET3oB, ET3SB are produced in accordance with in accordance with requirements of relevant transformer standards and EN/IEC 61378-1
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
Vector group Yy0 - standard
Primary voltage up to 1000 V
Secondary voltage up to 1000 V
Terminals screw terminal blocks, cable lugs or copper bus bars
Fastening by means of angles


Technical sketch

Exemplary design Exemplary design
Exemplary design Exemplary design


Dimension table

Technical data of examples of single-phase converter transformers type ET3oB and ET3SB

Type of transformer Power
Sample data L
ET3oB, ET3SB 0,03 3x100V/3X100V Yd11 190 110 165 170 78 8 x 12 10
ET3oB, ET3SB 1,5 3x400V/3x230V Dy5 240 140 222 190 115 11 x 15 21
ET3oB, ET3SB 42,3 3x380V/3x61,5V/3x61,5V Dd0y11 540 450 525 490 280 11 x 15 312
ET3oB, ET3SB 150 3x380V±5%V/3x28V Diil 870 570 900 660 820 13 x 18 913
ET3oB, ET3SB 375 3x380V±5%V/3x69,5V Diii 1050 735 955 850 451 17 x 25 1942


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.

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