High current transformer with tappings


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High current transformer with tappings

BV 2914105


Customer’s demand


Our customer needs a high current output transformer in series connection for the thermal calibration of motor circuit breakers and automatic fuses. There should be the possibility to set three current ranges to adjust the needed constant current of the fuse.


Solution


We construct a one-phase transformer. The divided high current winding will be connected in parallel. For an optimal junction to get a very small Uk we also divided the primary winding.


Technical data


Primary: 4 x 64 V (series or parallel circuit)
Secondary: 0 - 4,6 - 6,9 - 13,8 V
Current: 0 - 1600 - 640 - 260 A
Weight: ca. 80 kg


Table


Type

Type
size

Secondary
power

Current

Dimensions

Mounting holes

Copper
weight

Total
weight

BV

b

l

h

f1

f2

f3

TUO

SU 132/72

2000 VA

180 A

171

255

145

120

190

10

6 kg

20 kg

1231019

TUO

UI 168/92

4000 VA

800 A

268

221

346

144

136

10

17 kg

42 kg

3359000a

TUO

SU 210/103

7360 VA

max 1600 A

278

419

270

220

312

8

25 kg

80 kg

2914105

Technical changes and optimisation reserved. All details are guide values, variations are possible. Other dimensions or changes on request.

04/21


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