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Three-phase transformers from  40 kVA to 300 kVA
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Three-phase transformers with cooling channels
Three-phase power dry transformers
Three-phase isolation transformers
Datasheet as PDF
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Field of application
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Isolation transformer conform to IEC/EN61558-2-4 for general purpose, e.g. as safe isolation of devices conform to VDE0700/EN60335, or as distribution transformer to build TN-net systems. Suitable for potentialfree nets, test systems and as power-ratio transformer.
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Description
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Three-phase transformer, built as isolation trasnformer conform to EN61558-2-4 in a housing IP 23. Basically this type size can be built in any vector group. If there is no vector group given, we will use Dyn5 by default.
Please consider the difference between outside conductor voltage and phase voltage to star point at the different vector groups.
For a safe and easy transport, the transformers have crane hooks at the upper side. The mounting has to be done in a way, that makes natural cooling through the cooling channels possible.
The used block terminals are shock proof conform to VBG4. A vacuum varnishing makes a low
hum-noise possible.
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Table
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Type
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Type size
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Sec.-
power
kVA
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Efficiency
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Iron
losses
Watt
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Copper
losses
Watt
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Dimensions in mm
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Copper
weight
kg
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Total
weight
kg
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b
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l
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l1
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h
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h1
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f1
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f2
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f3
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TEO
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EI500/500/100
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40
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96%
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300
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1230
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600
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192
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180
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500
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570
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150
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450
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18
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46
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177
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TEO
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EI500/500/125
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50
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97%
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380
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1210
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600
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202
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205
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500
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570
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175
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450
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18
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52
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220
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TEO
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EI500/500/150
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63
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97%
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450
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1360
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600
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252
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230
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500
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570
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200
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450
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18
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61
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261
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TEO
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EI500/500/175
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80
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97%
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520
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1622
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600
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265
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255
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500
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570
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225
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450
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18
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72
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305
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TEO
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EI500/500/200
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100
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98%
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600
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1700
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600
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292
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280
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500
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570
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250
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450
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18
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94
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360
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TEO
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EI600/600/150
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125
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98%
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670
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1900
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720
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250
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230
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610
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680
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200
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600
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18
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130
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430
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TEO
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EI600/600/200
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160
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98%
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850
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1900
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720
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300
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280
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610
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680
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250
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600
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18
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208
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570
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TEO
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EI700/700/200
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225
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98%
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900
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2700
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840
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440
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440
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750
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800
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250
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600
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18
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260
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750
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TEO
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EI800/720/160
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300
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98%
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740
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3600
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1100
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700
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-
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770
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-
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280
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730
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11
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253
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1030
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Technical changes and optimization reserved
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06/2011
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Customer specified solution - customer’s demand
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Our customer builds test and simulation systems for the solar technology. Photovoltaic cells react different during possible weather conditions. The characteristics and the behaviour of various solar cells should be set and programmed freely. The transformer has to generate and supply the needed power in many various steps.
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Solution
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We construct a 300 kW three-phase transformer for twelve pulse rectification with the vector group Dddyy. Like this the rectified voltage is low on ripples and stable. The powersteps can be reached by several primary steps.
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Technical data
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Power: 300 kVA
Dimensions: 1100 mm x 700 mm x 770 mm
Weight: 1030 kg
Vector group: Dddyy
BV 2914104
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BV 2914104
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