Danfoss VACON 1000 Operating Manual page 73

Operating Guide | VACON® 1000
6.6 Grounding
Use interconnection busbars to connect the ground busbars in each cabinet.
In installations following the IEC standard, the cross-sectional area of the interconnection busbars must be at least:
Standalone type: 25 mm × 3 mm.
l
Lineup type <350 A: 40 mm × 3 mm.
l
Lineup type 350–680 A: 50 mm × 4 mm.
l
In installations following the UL standard, the cross-sectional area of the interconnection busbars must be at least 50 mm × 6 mm.
Connect the main grounding busbar of the cabinet to the system grounding cable. The recommended minimum cross-sectional area for
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the connection is 95 mm .
The cross-sectional area of the grounding cables must be ≥16 mm
wires. The grounding resistance of the grounding connection must be lower than 4 Ω.
The ground leakage current value must be lower than 3.5 mA AC or 10 mA DC and must meet the safety specifications related to high
leakage current equipment.
The PE of the system grounding terminal must be grounded reliably to prevent accidents.
Do not use the same grounding wire with other power equipment or load device. Ground each drive independently where there are
multiple drives in the same room. Series connection to the ground is forbidden.
Figure 64: Grounding Connection Between Cabinets
1 Interconnection busbar
1 SW VACON® 1000
2 SW VACON® 1000
3 SW VACON® 1000
Figure 65: Connecting the Drive to System Ground
Danfoss A/S © 2024.12
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and at least half of the cross-sectional area of the high voltage phase
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VACON® 1000 M
VACON® 1000 M
VACON® 1000 M
Electrical Installation
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