3 Phase Isolating Transformer with Module Core; Vertical mounting versionDTM 25 - 630kVA according to IEC/DIN EN61558-2-4

overviewtechnical dataPDF data sheet

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: Dyn5 (max. typical star load of phase current: 100%). Switching matrix: Please note the distinction between different voltages (e.g. phase voltage, line voltage). Final operation position must allow natural convection through coolant bores. For further information, don’t hesitate to contact us.

Transformer provides 2 loops for safe transportation or craning.

DTM versions providing special specs on request:

  • Short circuit voltage
  • Degree of efficiency
  • Fe- and Cu losses
  • Make current and open-circuit operation

3 phase isolating transformer according to IEC/EN61558-2-4, natural convection through coolant bore, without coil former, winding on glass-fibre reinforced plastic profiles,
usage of module core

Voltage range / Input, Output200 V … 550 V
Rated Frequency50/60 Hz
Power range25,0kVA … 630kVA
Max. ambient temperature40°C
UL-Insulation system (optional)E181051
Insulation class (IEC85)F 155°C
Fire protection classUL94HB (V-0 möglich)
Open transformer – degree of protectionIP00
Protection class (ready)I
  • Transformer completely vacuum impregnated
  • Standard switching matrix Dyn5 (total single load vs. N possible)
  • Screw terminals contact proof according to BGV A3
  • Ready for vertical mounting – including angle brackets

 

 

 

 

 

 

 

 

 

Rated power
kVA
Uk
in %
Fe-
Losses
KW
Cu-
Losses
KW
Dimensions
approx. mm
Copper
weight
KG
Total
weight
KG
SizeType
A
B
C
D
E
F
254,80,120,675402904902 x 18017211,046126440/420 – 80/80DTM0250
31,53,90,1650,845403204902 x 18019911,040145440/420 – 80/107DTM0315
403,40,210,995403504952 x 18022911,042176440/420 – 80/137DTM0400
503,50,2350,985403505052 x 18022911,td>67202440/420 – 80/188DTM0500
636,00,251,506903605552 x 23022211,086247,0550/470 – 90/120DTM0630
804,80,311,706903905652 x 23025211,083282550/470 – 90/150DTM0800
1004,40,391,656904205652 x 23028211,0108348550/470 – 90/180DTM1000
1605,00,532,848303908752 x 28022215,0203496680/740 – 120/120DTM1600
2004,60,663,008304208402 x 28025215,0205570680/740 – 120/150DTM2000
2253,60,793,008304508402 x 28028215,0213656680/740 – 120/180DTM2250
2503,00,953,008304808502 x 28031215,0210725680/740 – 120/210DTM2500

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