Typical applications
3 phase isolating transformer according to IEC/EN61558-2-4 for general applications, e.g. for providing electrical (galvanic) isolation according to VDE0700/EN60335 regulations or network supply transformer (e.g. TN network system).
Specifications
3 phase isolating transformer according to EN61558-2-4. protection class I ready. Due to innovative vacuum impregnation in polyester varnish, the noise level is extraordinary low. Screw terminals are contact proof according to VBG4.
Standard switching matrix: Yyn0 (max. typical star load of phase current: approx. 10%). Switching matrix: Please note the distinction between different voltages (e.g. phase voltage, line voltage).
For further information, don´t hesitate to contact us!
Any user-defined mounting position is possible.
3 phase isolating transformer, horizontal mounting version
according to IEC/EN61558-2-4
| Voltage range / Input, Output | 200 V … 550 V | |
| Rated frequency | 50/60 Hz | |
| Power range | 250VA … 2,0kVA | |
| Max. ambient temperature | 40°C | |
| UL-Insulation system | OBJY2.E181051 |  |
| Insulation class (IEC85) | B 130°C |  |
| Fire protection class | UL94HB (V-0 possible) | |
| Open transformer – degree of protection | IP00 | |
| Protection class (ready) | I | |
- Transformer completely vacuum impregnated
- Standard switching matrix Yyn0 (typical star load approx. 10%)
- Screw terminals contact proof according to VBG4
- Ready for horizontal mounting including angle brackets
|
Rated
power
kVA |
Dimensions approx. mm |
Copper weight
KG
|
Total weight
KG |
Size | Type | |||||
|
A
|
B*
|
C
|
D
|
E
|
F
|
|||||
|
0,25
|
156
|
73
|
140
|
140
|
100
|
5,8×9,0
|
1,30
|
3,90
|
3UI 75/26 |
DTL0025
|
| 0,40 | 156 |
90
|
140 | 140 | 100 |
5,8×9,0
|
1,60 |
5,70
|
3UI 75/41,5 | DTL0040 |
| 0,50 | 206 |
84
|
160 |
184
|
120 |
7,0×13,0
|
2,20 |
6,60
|
3UI 90/31 | DTL0050 |
|
0,63
|
206 | 95 | 160 |
184
|
120 |
7,0×13,0
|
2,80 |
8,00
|
3UI 90/41,5 | DTL0063 |
|
0,80
|
206
|
105
|
160
|
184
|
120 |
7,0×13,0
|
3,00
|
9,90
|
3UI 90/51,5 | DTL0080 |
|
1,00
|
254 | 95 |
190
|
228
|
152 |
7,0×13,0
|
4,60
|
13,50 | 3UI 114/40 | DTL0100 |
|
1,25
|
254
|
95 |
190
|
228 | 152 |
7,0×13,0
|
5,30
|
14,20 | 3UI 114/40 | DTL0125 |
|
1,60
|
290 |
100
|
200
|
258
|
160
|
9,0×13,0
|
5,70
|
15,30
|
3UI 120/41 | DTL0160 |
3 Phase Isolating Transformers Circuits and Circuit Designs
3 phase isolation transformers offer various possibilities to connect PRIMARY and SECUNDARY winding.
Each design allows specific transformer characteristics. See the following table for preferred circuit designs.
- Neutral wire “N“ or “n”. Percentage of neutral wire current allways refers to nominal current of phase conductor.
- Please mind:
- Secundary star circuit allows load on neutral wire.
- Parallel connection of transformers must comply to following criteria:
- Nominal voltage and rated frequency
- Circuit design
- Short circuit voltages
- Ratio of rated loads should not extend 3:1
