Power transformers

Function
Low-voltage power transformers are designed for reliable power supply of electrical equipment operating across various industrial sectors. As standard, they are adapted for mounting using fixing brackets, enabling easy integration with the installation. The number of taps on the primary and secondary sides is selected individually according to customer requirements, allowing precise adjustment of transformer parameters to operating conditions.

Current terminals can be arranged on one or both sides of the transformer, providing flexibility in system design. Upon request, transformers can be installed in enclosures with protection degrees IP23, IP44 or IP54, with the possibility of cable entry through cable glands, which increases resistance to environmental conditions and facilitates installation.

Benefits

Enhanced energy security through stable operation and effective insulation
Protection of equipment against overvoltages, disturbances and failures
Optimization of energy costs through high efficiency and reliability
Flexible configuration – selectable taps, terminal arrangement and enclosure variant
Easy installation and integration with existing systems
Robust design ensuring long service life in demanding applications

Applications

Railway industry
Oil & gas industry
Heavy industry
Renewable energy sources
Mining industry
Power electronics and drive systems

Custom Design

Manufacturing a transformer with parameters other than those specified in the catalogue is possible upon prior consultation.

Download datasheets

1-phase up to 100 kVA 3-phase up to 2500 kVA

Product code

Details:

Design	Power transformers are produced in accordance with requirements of: EN/IEC 60726; EN/IEC 60076
Insulation class	H(180°C)
Climatic class /environmental class	C1/E0 - land design; C2/E1 - maritime design
Ambient temperature	40^oC
Protection degree	IP 00
Protection class	I
Frequency	50/60 Hz
Vector group	Dyn5 - standardowo
Primary voltage	up to 1000 V
Secondary voltage	up to 1000 V
Terminals	screw terminal blocks or cable lugs or copper bus bars

Technical sketch


Design for the power up to 160kVA

Design for the power above 160kVA

Dimension table

Technical data of power transformers typ ET3S, insulation class H, voltage ratio 400V//400V**

Type	Power [kVA]	L [mm]	B [mm]	H [mm]	d [mm]	e [mm]	f [mm]	Weight [kg]
ET3S_* - 40	40	540	320	545	490	220	13 x 18	171
ET3S_* - 50	50	540	350	545	490	240	13 x 18	202
ET3S_* - 63	63	540	370	545	490	260	13 x 18	235
ET3S_* - 75	75	690	390	615	590	210	13 x 18	271
ET3S_* - 80	80	690	400	615	590	220	13 x 18	288
ET3S_* - 100	100	690	380	615	590	230	13 x 18	330
ET3S_* - 115	115	690	410	615	590	260	13 x 18	380
ET3S_* - 120	120	720	400	715	620	250	17 x 25	390
ET3S_* - 125	125	720	410	715	620	250	17 x 25	400
ET3S_* - 160	160	720	440	715	620	290	17 x 25	495
ET3S_* - 200	200	980	460	860	700	375	4xfi17	660
ET3S_* - 225	225	980	460	860	700	375	4xfi17	690
ET3S_* - 250	250	1035	470	910	760	375	4xfi17	790
ET3S_* - 315	315	1080	480	980	760	375	4xfi17	915
ET3S_* - 400	400	1140	505	1010	760	394	4xfi17	1105
ET3S_* - 500	500	1245	545	1100	760	416	4xfi17	1350
ET3S_* - 630	630	1290	555	1210	760	416	4xfi17	1685
ET3S_* - 800	800	1410	600	1220	760	433	4xfi17	1980
ET3S_* - 1000	1000	1455	610	1420	760	433	4xfi17	2440
ET3S_* - 1250	1250	1620	650	1390	760	473	4xfi17	3080
ET3S_* - 1600	1600	1670	700	1500	760	473	4xfi17	3580

*) - for transformer design with climatic/environmental class C2/E1 (maritime design W/3 or tropical design T/3) the letter "M" or "G" ought to be added depending on final application
**) - this table was prepared basing on the technical specification for transformer with voltage ratio 400//400 at 50 Hz and operating under normal conditions. For other conditions and data the values may change

Note:

Manufacturer reserves the right to make changes resulting from the continuous development of products offered.

If requested in advance, it is possible to manufacture transformer in other version.

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