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 kVA Short time rating kVA Rated input voltage V (selectable) Rated output voltage V (selectable) Type Price per unit EuroPrice per unit A Cu-no. 1)
0,1 0,24 50-750 ± 5 % 12-750 STA0,1(*/*) Price on requestPrice on request0,35
0,2 0,44 50-750 ± 5 %12-750 STA0,2(*/*) 0,65
0,4 1,1 50-750 ± 5 %12-750 STA0,4(*/*) 1,00
0,5 1,6 50-750 ± 5 %12-750 STA0,5(*/*) 1,40
0,55 1,7 50-750 ± 5 %12-750 STA0,55(*/*) 1,70
0,75 2 50-750 ± 5 %12-750 STA0,75(*/*) 2,10
1,2 3,7 50-750 ± 5 %12-750 STA1,2(*/*) 3,20
1,6 5,5 50-750 ± 5 %12-750 STA1,6(*/*) 4,70

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

type total
weight
no-load
losses
short-circuit
losses 1)
short-circuit
voltage
efficiency a b c
(WDU 4)
c
(WDU 16)
e f ø g b1 c1
kg W W %
STA0,1 2 6 11 7,5 0,86 85 80 135 64 61 4,8 x 8 74 74,5
STA0,2 3 10 16 5,9 0,89 106 82 153 80,5 61 5,8 x 12 80 94
STA0,4 5,2 18 22 4,1 0,91 121 100 163 90 80 5,8 x 12 98 106
STA0,5 6,8 21 26 3,8 0,91 121 120 163 90 110 5,8 x 12 118 106
STA0,55 7,7 21 25 3,6 0,92 151 107 187 201 122 82 7 x 15 104 132
STA0,75 9,6 24 31 3,3 0,93 151 124 187 201 122 99 7 x 15 121 132
STA1,2 14,9 41 37 2,5 0,94 175 138 210 224 135 110 7 x 15 135 152
STA1,62) 17,4 19 38 2,2 0,97 192 142 226 240 150 110 10 x 18 140 170

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