3 Phase Autotransformer, base fixed housing – degree protection IP23DAB 1.6 - 100kVA according IEC/DIN EN61558-2-13

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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 housing (degree of protection IP23).
Housing is prepared for base fixing. 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!

Power > 6.3 kVA: For safe transportation – e.g. to crane the transformer – loops are mounted to the housing.

3 Phase Autotransformer IP23 base fixed housing  IEC/EN61558-2-13

Voltage range input / output100 V … 550 V
Rated frequency50/60 Hz
Power range1,6 … 630kVA
Output designStandard switching matrix: YNa0

typical star load approx. 10%

Switching matrix – on request: ZNa0

typical star load 100%

Max. ambient temperature40°C
UL Insulating system (optional)OBJY2.E181051
Insulation class (IEC85)B 130°C
Fire protection classUL94HB (V-0 possible)
Degree of protectionIP00-open transformer
Protection classI ready
  • No galvanic isolation
  • Base fixable steel sheet housing, powdercoated – RAL7035 (Standard), degree of protection IP23
  • Wire bushings according to DIN regulations
  • Screw terminals proof in according to BGV A3
  • Transformer completely vacuum impregnated
Rated
power
kVA
Dimensions
approx. mm
Copper 
weight
KG
Total 
weight
KG
Size
Type and
Ordering No.
A
B
C
D
E
F
G
1,6406320350182306116,0021,03UI 120/41DAB0016
2406320350185306116,7026,03UI 120/51DAB0020
2,5406320350200306117,9028,03UI 132/46DAB0025
3,2406320350200306118,8032,03UI 132/60DAB0032
4,04263603962193401113,039,03UI 150/52DAB0040
4,54263603962193401112,243,53UI 150/65DAB0045
5,0576440546452434201118,052,03UI 168/58DAB0050
6,3576440546452594201113,054,0EI 300/300/63DAB0063
8,0576440546452594201113,562,5EI 300/300/78DAB0080
10,0646520626453165001113,071,0EI 350/350/73DAB0100
12,5646520626453165001115,085,0EI 350/350/88DAB0125
16706560676533605401124,5110,0EI 400/400/83DAB0160
20706560676533605401128114,0EI 400/400/83DAB0200
25706560676533605401133126,0EI 400/400/93DAB0250
30706560676533605401143150,0EI 400/400/110DAB0300
35706560676533605401141173,0EI 400/400/140DAB0350
40706560676623605401145192,0440/420-80/137DAB0400
50956660726624606401169218,0440/420-80/188DAB0500
63956660726624606401189263,0550/470-90/120DAB0630
80956660726624606401189296,0550/470-90/150DAB0800
1009566607266246064011110362,0550/470-90/180DAB1000
1259566607266267064011168362,0550/470-90/180DAB1250
160102078010516267073515203600680/120DAB1600
200102078010516267073515255710680/150DAB2000
225102078010516267073515280845680/180DAB2250
250102078010516267073515310980680/210DAB2500
31514601000130062684960154401130830/150DAB3150
40014601000130062684960155401330830/200DAB4000
50014601000130062684960155901550830/250DAB5000
630174012001500627801160186601680960/1800DAB6300

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!