Autotransformer, three-phase
AT3 3,5-24/35-4
Characteristics
General data
The autotransformers of the AT3 series are used for voltage adjustment without the need for galvanic isolation. The multifunctional and widely used base brackets provide variable mounting options and facilitate top-side installation. The transformers are equipped with crane eyelets to simplify transportation.
Benefits
› Autotransformer according to EN (IEC) 61558-2-13
› Reverse operation possible
› Very high efficiency
› Patented mounting technology to reduce heat losses
› Excellent corrosion protection and low noise emission thanks to BLOCK IMPEX vacuum impregnation
› Fixed, touch-protected screw terminal connections according to UVV BGV A3
| Product | Autotransformer, three-phase |
| Order number | AT3 3,5-24/35-4 |
| Series | AT3 |
| Power | 3,500 VA |
| Input | 3 x 240 V / 346 V |
| Output | 3 x 400 V • 5.1 Aac |
| Phases | 3 |
| Frequency range | 50 Hz to 60 Hz |
| Short-Circuit Losses | 116 W |
| No-Load Losses | 24 W |
| EN Insulation class | F (155°C) |
| UL Insulation class | class 155 |
| Duty Cycle | 100 % |
| Wire material | Copper |
| Efficiency | 96.2 % |
General
| Short circuit proof | not short-circuit proof |
| Switching group | YNa0 |
| Unbalanced load | 7.50 % |
| Cooling type | AN |
Environment
| Ambient temperature | -20 °C to 40 °C / -4 °F to 104 °F |
| Max. installation height | 2,000 m / 6,562 ft |
Protection and Safety
| Protection type | IP 00 |
| Protection class (prepared) | I |
| Degree of contamination | 1 |
Electrical Connections
| Input terminal | Screw terminal |
| Output terminal | Screw terminal |
| Terminal PE | Screw terminal |
Size and Weight
| Width | 267 mm / 10.51 in |
| Height | 215 mm / 8.46 in |
| Depth | 125 mm / 4.92 in |
| Weight | 14.5 kg / 31.967 lbs |
| Low Voltage Directive | EN 61558-2-13 |
| Approval cURus - Recognized | UL 5085-1/-2; CSA 22.2 |
