Grounding Connections - WEG CFW-11 User Manual

Installation and Connection

3.2.4 Grounding Connections

DANGER!
Do not share the grounding wiring with other equipment that operate with high currents (ex.: high
power motors, soldering machines, etc.). When installing several inverters, follow the procedures
presented in figure 3.17 for the grounding connection.
ATTENTION!
The neutral conductor of the network shall be solidly grounded; however, this conductor shall not
be used to ground the inverter.
DANGER!
The inverter shall be connected to a Protective Ground (PE).
Observe the following:
- Minimum wire gauge for grounding connection is provided in table 3.2. Conform to local regulations
3
and/or electrical codes in case a different wire gauge is required.
- Connect the inverter grounding connections to a ground bus bar, to a single ground point, or to
a common grounding point (impedance ≤ 10 Ω).
- To comply with IEC 61800-5-1 standard, connect the inverter to the ground by using a single
conductor copper cable with a minimum wire gauge of 10 mm , since the leakage current is greater
2
than 3.5 mA AC.
CFW-11 #1 CFW-11 #2 CFW-11 #N
CFW-11 #1
CFW-11 #2
Internal cabinet ground bus bar
Figure 3.17 - Grounding connections with multiple inverters
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