27/78 SUREWAVE SFC USER MANUAL
SureWave SFC
Output Isolation
Transformer
Delta-Delta
TN input
380-480 V
50/60Hz
Figure 6-2: Shore to ship typical configuration.
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On-board shore power
When the SureWave is installed on board to provide power conversion from the shore supply, a
transformer must be provisioned on the input side of the frequency converter. 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 from the shore earth. Galvanic iso-
lation from the shore earth is required to eliminate the earth currents that cause galvanic corro-
sion between the ship’s hull and other metal objects. An additional transformer may be required
on the output if voltage matching, or a neutral point is required.
Note: unless a static balancer is employed on the output, in this configuration the SFC is not ref-
erenced to ground, therefore an earth leakage monitoring device will be required to trip the con-
verter offline if earth faults are detected.
SureWave SFC
Figure 6-3: On board typical configuration.
