Power Connections - Frame R2I To R5I; Diagram - ABB ACS800 Hardware Manual

Power connections – Frame R2i to R5i

Diagram

1) 360 degrees grounding
2) Use a separate grounding cable if the
conductivity of the cable shield is less than 50%
of the conductivity of the phase conductor in a
cable with no symmetrically constructed
grounding conductor (see the document
ACS 800 MultiDrive; Planning the Electrical
Installation [3AFE 64783742, English]).
Note:
If there is a symmetrically constructed grounding
conductor in the motor cable in addition to the
conductive shield, connect the grounding conductor
to the grounding terminal at the drive and motor
ends.
Do not use an asymmetrically constructed motor
cable. Connecting its fourth conductor at the motor
end increases bearing currents and causes extra
wear.
Inverter module
INPUT
UDC+ UDC-
1)
L+ L-
Grounding of the motor cable shield at the motor end
For minimum radio frequency interference:
• ground the cable shield 360 degrees at the lead-through of
the motor terminal box
Conductive gaskets
• or ground the cable by twisting the shield as follows:
flattened width > 1/5 × length.
a
OUTPUT
U2 V2 W2
2)
U1 V1 W1
~
3
Motor
360 degrees grounding
b > 1/5 × a
b
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