Appendix B
CE Conformity
B–3
!
ATTENTION: To guard against possible equipment damage,
RFI filters can only be used with AC supplies that are nominally
balanced with respect to ground. In some installations,
three-phase supplies are occasionally connected in a 3-wire
configuration with one phase grounded (Grounded Delta). The
filter must not be used in Grounded Delta supplies or in an
ungrounded wye configuration.
JOG
ESC SEL
R (L1)
S (L2)
Ground Rod/Grid
or Building Structure Steel
T (L3)
PE
Conduit/4–Wire Cable
RFI
Filter
Shield Terminated in Cable
Clamp on A Frame Drives
Grounding RFI Filter Grounding
Important: Using the RFI filter may result in relatively high ground
leakage currents. Surge suppression devices are also incorporated into
the filter. Therefore, the filter must be permanently installed and solidly
grounded (bonded) to the building power distribution ground. Ensure
that the incoming supply neutral is solidly connected (bonded) to the
same building power distribution ground.
Grounding must not rely on flexible cables and should not include any
form of plug or socket that would permit inadvertent disconnection.
Some local codes may require redundant ground connections. The
integrity of all connections should be periodically checked.
Electrical Configuration
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