Safety Transformers

Function
Safety transformers are designed to supply equipment with a voltage considered safe for the user and the installation. These are isolation transformers in which the secondary winding operates at a safety extra-low voltage level. Structurally, they correspond to isolation transformers, ensuring effective separation of loads from the mains and increasing the level of electric shock protection.

Structurally, they correspond to isolation transformers, ensuring effective separation of loads from the mains and increasing the level of electric shock protection. Thanks to their design, they protect equipment against disturbances, overvoltages and short-circuit currents, while also stabilizing the supply voltage, which improves the reliability of the entire system.

Benefits

High level of electric shock protection
Supply voltage stabilization
Reduction of overvoltages and short-circuit currents
Increased resistance of the installation to damage and failures

Applications

Railway industry
Marine industry
Power quality systems
Oil & gas industry
Heavy and mining industry
Renewable energy sources
Power electronics and drive systems

Custom Design

Manufacturing a transformer with parameters other than those specified in the catalogue is possible upon prior consultation. The manufacturer reserves the right to introduce changes resulting from the continuous development of its products. The transformer can also be manufactured in a different version upon prior agreement.

Download catalogue cards

1-phase up to 2,5kVA 1-phase up to 100kVA 3-phase up to 40kVA

Product code

Product for:

Details:

Design:	Safety isolating transformers produced in accordance with requirements of EN/IEC 61558-2-6
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:	40°C
Protection degree:	IP 00
Protection class:	I
Frequency:	50/60 Hz
Vector group:	Dyn5 - standard
Primary voltage:	up to 1000 V
Secondary voltage:	up to 50 V
Terminals:	screw terminal blocks with the cross section from from 4 mm² up to 150 mm² or copper bus bars
Fastening:	by means of angles

Technical sketch

Design A for the power lower than 6,3 kVA

Design B for the power 6,3 kVA and more

Dimension table

Technical data of three-phase safety isolating transformers ET3o **

Type	Power [kVA]	L [mm]	B [mm]	H [mm]	d [mm]	e [mm]	f [mm]	Weight [kg]	Design
ET3o_* - 0,05	0,05	100	60	122	81	41	5 x 8	1,4	A
ET3o_* - 0,15	0,15	125	71	140	100	55	5 x 8	2,6	A
ET3o_* - 0,3	0,3	155	91	156	130	71	8 x 12	5,1	A
ET3o_* - 0,5	0,5	195	102	185	173	82	8 x 11	7,5	A
ET3o_* - 0,63	0,63	195	112	185	173	92	8 x 11	9,5	A
ET3o_* - 0,8	0,8	195	112	185	173	92	8 x 11	10,5	A
ET3o_* - 1,0	1,0	210	105	200	173	85	8 x 11	12	A
ET3o_* - 1,5	1,5	240	131	226	198	105	11 x 15	16	A
ET3o_* - 2,0	2,0	240	146	226	198	120	11 x 15	22	A
ET3o_* - 2,5	2,5	261	140	239	198	114	11 x 15	26	A
ET3o_* - 3,0	3,0	300	152	274	240	122	11 x 15	30	A
ET3o_* - 4,0	4,0	300	165	274	240	135	11 x 15	38	A
ET3o_* - 5,0	5,0	300	192	274	240	160	11 x 15	49	A
ET3o_* - 6,3	6,3	360	230	365	310	125	11 x 15	47	B
ET3o_* - 7,5	7,5	360	237	365	310	132	11 x 15	54	B
ET3o_* - 8,0	8,0	360	247	365	310	142	11 x 15	60	B
ET3o_* - 10,0	10,0	360	270	365	310	162	11 x 15	71	B
ET3o_* - 12,5	12,5	420	255	425	370	158	11 x 15	82	B
ET3o_* - 15,0	15,0	420	265	425	370	168	11 x 15	91	B
ET3o_* - 16,0	16,0	420	265	425	370	168	11 x 15	92	B

*) - 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//24 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.