3 Phase Autotransformer including wall mountable housing – degree of protection IP55DAW 0.1 - 25kVA according to IEC/DIN EN61558-2-13

overviewtechnical dataPDF data sheet

Typical applications

3 phase autotransformer according to IEC/EN61558-2-13 for general applications without the need of a galvanic isolation, e.g. for transforming typical mains voltage to other voltages needed by tools, machinery or other devices.

Autotransformers do not provide any electrical protection due to the lack of galvanic isolation between input and output windings.

Specifications

3 phase transformer according to EN61558-2-13. protection class I ready, built in a stable sheet steel wall mountable housing (degree of protection IP55).

Due to innovative vacuum impregnation in polyester varnish, the noise level is extraordinary low. Screw terminals are contact proof according to BGV A3. DIN connectors – sizes depend on wire gauges – are used for wire bushings.

Autotransformers are provided for a voltage range from 100 V up to 550 V (special voltage versions on request).

Standard switching matrix: Yan0 (typical star load approx. 10%). If typical star load should reach rated current, switching matrix Zan0 is used.
Please add switching matrix requested when ordering the transformer. For further information, don´t hesitate to contact us!

3 Phase Autotransformer IP55 including wall mountable housing IEC/EN61558-2-13

Voltage range input / output100 V … 550 V
Rated frequency50/60 Hz
Power range100VA … 25kVA
Output designSchaltgruppe Standard YNa0

Sternpunktbelastbarkeit ca.10%

Schaltgruppe auf Anforderung ZNa0

Sternpunktbelastbarkeit 100%

Max. ambient temperature40°C
UL Insulation System (optional)OBJY2.E181051
Insulation class (IEC85)B 130°C
Fire protection classUL94HB (V-0 possible)
Degree of protectionIP00
Protection classI ready
  • No galvanic isolation

  • Wall mountable sheet steel housing, powder coated – RAL7035 (Standard)Degree of protection IP55
  • Wire bushings in according to DIN regulations
  • Transformer connections: Screw terminals according to BGV A3
  • Transformer completely vacuum impregnated

Rated

power

kVA

Dimensions
approx. mm
Copper
weight
KG
Total
weight
KG
SizeType and
Ordering No.
A
B
C
D
E
F
0,10
285
160
325
250
200
9,0
0,60
5,58
3UI 60/21
DAW0010
0,16285
160
325
250
200
9,0
0,806,553UI 60/31DAW0016
0,25285160325250200
9,0
1,307,803UI 75/26DAW0025
0,40
285160325
250
200
9,0
1,609,453UI 75/41,5DAW0040
0,50
385
210
428
350
300
9,0
2,70
14,40
3UI 90/31DAW0050
0,63
385210
428
350
300
9,0
3,0016,103UI 90/41,5DAW0063
0,80
385
210
428
350300
9,0
3,50
17,603UI 90/51,5DAW0080
1,00
385210
428
350
300
9,0
5,00
20,803UI 114/40DAW0100
1,25
385
210428
350
300
9,0
5,50
21,50
3UI 114/40DAW0125
1,603852104283503009,06,4023,403UI 120/41DAW0160
2,003852104283503009,07,0029,203UI 120/51DAW0200
2,503852104283503009,08,2033,503UI 132/46DAW0250
3,204852605304504009,09,5041,803UI 132/60DAW0320
4,004852605304504009,012,8052,003UI 150/52DAW0400
5,004852605304504009,013,5055,503UI 168/58DAW0500
6,304852605304504009,014,0057,50EI 300/300/63DAW0630
8,004852605304504009,014,0075,40EI 300/300/78DAW0800
10,006852606406505009,014,0086,00EI 350/350/73DAW1000
12,506852606406505009,018,0097,00EI 350/350/88DAW1250
16,006852606406505009,020,00110,50EI 400/400/83DAW1600
20,006854106406505009,031,00181,50EI 400/400/93DAW2000
25,006854106406505009,041,00191,50EI400/400/110DAW2500

Explanation and vector-groups to applicate 1 phase and 3 phase autotransformers

Autotransformers do not provide galvanic isolation.

They have electroconductive connection between input and output winding. It`s not allowed to take autotransformers for electrically protective separation.

 

If difference between input voltage and output voltage is small:

  • mains power may be higher
  • transformed power is lower
  • size can be reduced (core, copper winding)

Since the high-voltage and low-voltage windings in an autotransformer share a common portion of the same winding, the size and material costs can be reduced.

Example shows 90% power saving compared to an isolating transformer

Equation to calculate the requested size

Example: 1 phase autotransformer / Input voltage 440 V / Output voltage 400 V / „Rated power“ needed for application 5 kVA

Identical equation works with 3 phase transformers.

 

 

 

 

Regarding input/ output “upper“ or „lower voltage“ is independant, voltage related only for 3 phase autotransformers value of phase voltage is important.

Standard circuit design of 3 phase autotransformers is YNa0. Max. load at neutral wire is approx. max. 10% of nominal current (phase current).

If 100% neutral wire load is requested, circuit design ZNa0 is manufactured.

Note: YNa0 design can be used in certain circumstances, if neutral wire at input provides full load and transformer star point is permanently connected to load. Please contact us for further informations!