26/78 SUREWAVE SFC USER MANUAL
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6 Selecting transformer configuration
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Industrial application
When the incoming supply voltage is between 380 Vac and 480 Vac from a TN power network,
using an output transformer will give the most flexible output configuration. This will enable the
customer to utilize either 3 wire or 4 wire output and give a choice of flexible earthing options.
An additional input transformer may be required if voltage matching is required, this must be
Delta – Star with a solidly grounded star point to create a TN network supply. This is the best
and recommended configuration for the SureWave SFC.
SureWave SFC
Output Isolation
Transformer
DNY11
TN input
380-480 V
50/60Hz
Figure 6-1: Industrial application example.
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Shore to ship (Converter on shore side)
When supplying power to berthed vessels, it is recommended that the SFC has an output trans-
former. The transformer will not only provide voltage matching and isolation of the common
mode voltages generated by the converter, but also very importantly galvanic isolation for the
ship from the shore earth. The isolation is required to eliminate earth currents that cause gal-
vanic corrosion.
