3KC3 and 3KC6 transfer switching equipment3KC3 and 3KC6 transfer switching equipment
Installing and connecting an autotransformer (400 V / 230 V)
The 3KC3 transfer switching equipment requires a supply voltage of 230 V AC to supply the transfer switching equipment. The autotransformer (3KC9624–1) converts the voltage of 400 V AC that is active between the phases to the required voltage of 230 V AC.
In the case of the 3KC6 transfer switching equipment, the autotransformer can be used to connect the necessary rated voltage of 230 V AC to the main circuit connections of the 3KC6 transfer switching equipment in a three-phase 3-wire network without neutral conductor (3PH).
Installing an autotransformer
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Mount the autotransformer at the desired position with 4 bolts in accordance with the figure.
Installing an autotransformer
Connecting the autotransformer
See the table below for the requirements of the supply lines needed for the connection:
Cu |
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400 VA Ue = 400 / 230 V Uimp = 2.5 kV |
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0.5 ... 2.5 mm2 |
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0.5 ... 1.5 mm2 |
On the autotransformer, the phase on terminal L3 is transformed in each case, and output terminal NDPS is used as a neutral conductor.
Please proceed as follows to connect the autotransformer correctly:
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Strip the cable insulation as shown in the figure below.
Connect the supply lines with the autotransformer in accordance with the figure.Connecting the autotransformer -
Tighten the contacts with a screwdriver.