Block AT325-48/50-4 Catalog Page

Autotransformer

AT3 25-48/50-4

Advantages

Low weight and small size (compared to isolating transformers)

Very high efficiency

Patented assembly technology to lower heat losses

Very good corrosion protection and low noise thanks to vacuum
impregnation

Fixed, contact protected screw connection terminals complying
with UVV BGV A3

Multifunctional fixing rails with 12 oval slots

Enlarged fixing rail for easy installation from above

Integrated crane eyes

Applications

Autotransformer for adjustment of the voltage on the input and output sides
with no requirement for electrical isolation.

Sample application

Picture shows AT3 2-20/21-4

Standards ? Z

Autotransformer
to: VDE 0570 Teil 2-13, DIN EN 61558-2-13, EN 61558-2-13,
IEC 61558-2-13, UL 5085-1/-2, CSA 22.2 No.66

Approvals W Z

UL 5085-1/-2, CSA 22.2 No.66

Autotransformer

192.0350.0

280.0

224.0

240.0

328.0

119.0

129.0

145.0

+

-

30

AT3 25-48/50-4

Type AT3 25-48/50-4

Input

Rated input voltage
Rated frequency

Output

Rated output voltage
Rated Power
Vector group
Efficiency

Approvals

Approvals

Environment

Ambient temperature max.

Safety and protection

Type
Insulation class
Protection index
Safety class (prepared)
Short circuit strength
Test voltage

Order numbers

Recommended enclosure

Order Number

3 x 480/500 Vac
50 - 60 Hz

3 x 400 Vac

25.000 VA
YNaO

95.0 %

cURus

40 °C

Open type
F
IP 00
I
non-short-circuit proof
4000 Vac, 50 Hz

BGE-065

AT3 25-48/50-4

Type AT3 25-48/50-4

Terminal and mounting

Fixing method
Fixing screws
Terminals

Measures and weights

Core type
Weight

Fixing rail
M8
Screw-type terminals

3 UI 150/77

44.0 kg

Subject to change.