BENSHAW RSi GM2 Series - Page 34

Installing the Inverter
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GM2 Series VFD
890054-00-00
Step 6 Disabling the EMC Filter for Power Sources with Asymmetrical Grounding
Applies to 480V models only. When connecting the inverter to a power source with asymmetrical
grounding (see figures below), the internal EMC filter must be disabled.
The Built-in EMC filter is enabled by factory default. The EMC filter prevents electromagnetic
interference by reducing emissions from the inverter. Current leakage increases when the EMC filter
feature is enabled.
Asymmetrical Grounding Connection
One phase of a delta
connection is
grounded
Intermediate
grounding point on
one phase of a delta
connection
End of a single phase
is grounded
A 3-phase
connection without
grounding
• Disable the EMC filter if the inverter uses a power source with an asymmetrical
grounding structure, for example a grounded delta connection. Otherwise it may cause
an electrical shock and result in personal injury or even death.
• Before opening the cover to start working, wait at least 10 minutes after the power is
disconnected and check that the DC voltage of the product is discharged. Otherwise it
may cause an electrical shock and result in personal injury or even death.