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4-2 VS1MD AC Drive User Manual
Shield Termination - SHLD
Either of the safety ground terminals provides a grounding point for the motor cable shield. The
motor cable shield connected to one of these terminals (drive end) should also be connected to
the motor frame (motor end). Use a shield terminating or EMI clamp to connect the shield to the
safety ground terminal.
When shielded cable is used for control and signal wiring, the shield should be grounded at
the source end only, not at the drive end.
4.1.1 RFI Filter Grounding
Using drives with RFI filters may result in relatively high ground leakage currents. Therefore, the
filter must only be used in installations with grounded AC supply systems and 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.
4.1.2 Grounding Procedure
Step 1. Remove the front cover.
Step 2. Connect the Grounding wire to the ground terminal through the opening for
ground terminal. Enter the screw driver from vertical to the terminal and
secure the screw tightly.
4.1.3 Grounding Guidelines
Table 4.1 – Grounding Guidelines
Inverter
capacity
200V Class 400V Class
Wire
size
Terminal
screw
Grounding
method
Wire
size
Terminal
screw
Grounding
method
0.5 HP 3.5 mm
2
M3 Type 3 2 mm
2
M3 Special Type 3
1.0 HP 3.5 mm
2
M3 2 mm
2
M3
2.0 HP 3.5 mm
2
M3 2 mm
2
M3
3.0 HP 3.5 mm
2
M3 2 mm
2
M3
7.5 HP 5.5 mm
2
M4 3.5 mm
2
M4