STA – Single-phase control transformers


Designed and tested according

· IEC/EN 61558-2-2 / 2-4 / 2-6
· EN 60079-0
· EN 60079-7

Typical applications

· Control voltage circuit
· Protective seperation
· Functional low voltage
· Safety low voltage

For use according to

· EU RL 94/9/EG

Basic equipment

· Separate windings
· Insulation class B
· Ambient temperature –25 to 40 °C
· Connection terminal
· Frequency 50/60 Hz
· ±5 % tapping on the primary side

Sample order

· requested type STA0,1
· requested rated input voltage 230 V
· requested rated output voltage 36 V

The correct type designation reads STA0,1(230/36)

The unambiguous article number of your configuration will be defined by trafomodern during the offer- and process.

The transformer must always be installed in an approved enclosure to with a standardised flameproof rating to EN60079.

Technical notes

Equipment marking:

  • Ex II 2G Ex eb IIB Gb

Important notes:

According to IEC/EN 61 558 transformers with rated outout voltages ≤ 50 V can be used as safety transformers.When ordering, the following information must be added to the type designation:

  • STA0,1(*/*)
  • 1st place holder ≙ rated input voltage
  • 2nd place holder ≙ rated output voltage

CAD-data

show

Rated output kVAShort time rating kVARated input voltage V (selectable)Rated output voltage V (selectable)TypePrice per unit EuroPrice per unit ACu-no. 1)
0,10,2450-750 ± 5 %12-750STA0,1(*/*)Price on requestPrice on request0,35
0,20,4450-750 ± 5 %12-750STA0,2(*/*)0,65
0,41,150-750 ± 5 %12-750STA0,4(*/*)1,00
0,51,650-750 ± 5 %12-750STA0,5(*/*)1,40
0,551,750-750 ± 5 %12-750STA0,55(*/*)1,70
0,75250-750 ± 5 %12-750STA0,75(*/*)2,10
1,23,750-750 ± 5 %12-750STA1,2(*/*)3,20
1,65,550-750 ± 5 %12-750STA1,6(*/*)4,70

1) The calculation method of the material price surcharge will be explained in Section 2.1 in the general conditions of business.

typetotal
weight
no-load
losses
short-circuit
losses 1)
short-circuit
voltage
efficiencyabc
(WDU 4)
c
(WDU 16)
efø gb1c1
kgWW%
STA0,126117,50,86858013564614,8 x 87474,5
STA0,2310165,90,891068215380,5615,8 x 128094
STA0,45,218224,10,9112110016390805,8 x 1298106
STA0,56,821263,80,91121120163901105,8 x 12118106
STA0,557,721253,60,92151107187201122827 x 15104132
STA0,759,624313,30,93151124187201122997 x 15121132
STA1,214,941372,50,941751382102241351107 x 15135152
STA1,62)17,419382,20,9719214222624015011010 x 18140170

1) Values measured at room temperature
2) Instead of the split baseplate, STA1,6 has a mounting bracket