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Autotransformers AJN/ATN

AJN Autotransformers single-phase
ATN Autotransformers three-phase

Autotransformer - is a transformer, which has a common part of the primary and secondary winding.

Use - there, where the galvanic separation of the primary and secondary winding is not necessary.

The advantages of autotransformer - the need of smaller transformer core, so it is possible to get savings of place and savings of funds.

The size of the autotransformer depends on the primary and secondary voltage ratio.

The example 1:

Let’s transform the wattage 1000 VA, transfer 250 V/220 V:

  • The use of a normal transformer
    RJV 1, 1000 VA, 250///220V, price c. 145 Euro
  • The use of the autotransformer
    AJN 100, 1000 VA, 250/220V, price c. 16 Euro

The example 2:

Let’s transform the wattage 6300 VA, transfer 3 x 460 V/3 x 400 V :

  • The use of a normal transformer
    RTV 6,3, 6300 VA, 3 x 460 V///3 x 400 V, price c. 528 Euro
  • The use of the autotransformer
    ATV 1, 6300 VA, 3 x 460 V/3 x 400 V, price c. 161 Euro

Each demand on the autotransformer needs to be discussed with the technical section, for each autotransformer it is necessary to perform calculation.

According to
ČSN EN 61558-2-13
Touch protection
I
Coverage level
IP 00
Insulation class
B
Warming
40 °C
Frequency
50-60 Hz
Short-circuit proof
non resistant, conditionally resistant with fusible link (up to 250V)
Input voltage
according to customer
Output voltage
according to customer
Power rating
depends on the ratio of primary and secondary voltage and current required

CONTACT PERSONS - transformers
Ing. Aleš Svárovský
manager of the technical section
Tel.: +420 482 465 913
Fax: +420 482 770 019
Mobil: +420 739 609 310
E-mail: ales.svarovsky@sved.cz
Miroslav Chrastecký
manager of the production
Tel.: +420 482 465 921
Fax: +420 482 770 028
Mobil: +420 604 201 568
E-mail: miroslav.chrastecky@sved.cz