It Networks; Grounding Connections - WEG CFW-11 Installation Manual

Installation Guide

IT NETWORKS

When the neutral is not grounded, or the grounding is provided
by a high ohm value resistor or in grounded delta networks ("delta
corner earth").
(a) Size A
(c) Size C
Figure 17 (a) to (d): Sizes A to D - Location of Grounding Screws -
Remove for IT networks
PRT1 board
(a) Location of board
(b) Initial position
Figure 18 (a) to (c): Size E - Location of terminal on PRT1 board –
Change position for IT networks
12 | CFW-11
(b) Size B
(d) Size D
(c) Final position (IT)
Remove
(a) Initial position
Figure 19 (a) and (b): Sizes F and G - Location of terminal on
PRT1 board – change position for IT networks

GROUNDING CONNECTIONS

DANGER!
The inverter ground must be connected to a protective
ground (PE).
Refer to local regulations and/or electrical codes for
selecting grounding wire gauge.
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 than 3.5 mAac.
ATTENTION!
The neutral conductor of the mains supply must be
solidly grounded. However, this conductor must not
be used to ground the inverter.
CFW-11 nº1 CFW-11 nº2
CFW-11 nºN
Internal cabinet
ground bus bar
Figure 20: Grounding connections with multiple inverters
Connect
(b) Final position (IT)
,
2
CFW-11 nº1
CFW-11 nº2