BENSHAW RSi H2 Series - Page 57

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Installing the Inverter
Step 6 Disabling the EMC Filter for Power Sources with Asymmetrical Grounding
H2 inverters have built-in EMC filters (exceptions are 240V:50 HP and 60 HP, 480V and 575V:100 HP
and 125 HP). An EMC filter prevents electromagnetic interference by reducing radio emissions from
the inverter. Using the built in EMC filter is not always recommended as it increases leakage current.
Before using the inverter, confirm the power supply’s grounding system. If the inverter is connected
to a power source with an asymmetrical grounding connection, the EMC filter must be
disconnected.
Asymmetrical Grounding Connection
One phase of a
delta
connection is
grounded (TN
Systems)
Intermediate
grounding point
on one phase
of a delta
connection (TN
Systems)
The end of a
single phase is
grounded (TN
Systems)
A 3-phase
connection
without
grounding (TN
Systems)
Disconnect the EMC filter if the inverter is connected to a power source with an
asymmetrical grounding structure (Examples above). Personal injury or death by electric
shock may result.
Wait at least 10 minutes before opening the covers and exposing the terminal connections.
Before starting work on the inverter, test the connections to ensure all DC voltage has been
fully discharged. Personal injury or death by electric shock may result.