1.
2.
3.
4.
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5.8.6 Connecting to Ground
W A R N I N G
LEAKAGE CURRENT HAZARD
Leakage currents exceed 3.5 mA. Failure to ground the drive properly can result in death or serious injury.
Ensure the correct grounding of the equipment by a certied electrical installer.
N O T I C E
POTENTIAL EQUALIZATION
There is a risk of burst transient when the ground potential between the drive and the control system is dierent.
Install equalizing cables between the system components. Recommended cable cross-section: 16 mm
2
(5 AWG).
Strip a section of the outer cable insulation.
Fasten a connector/cable lug to the end of the stripped cable.
Connect the ground cable to the nearest grounding terminal.
Tighten the terminals in accordance with the specications shown in 10.11 Fastener Torque Ratings.
Example
Illustration 53: Connection Grounding Points
Symbol indicating grounding terminals
Grounding points on drive module
Grounding bar (provided in every cabinet)
5.9 Installing Upstream Fuses
5.9.1 Upstream Fuse Considerations
Factory fuse options like a fusible disconnector or MCCB protect the busbars and circuits within the drive. To protect the cables, an
installer should use separate F1 fuses for upstream protection.
AQ357954340588en-000201 / 130R0881 | 89Danfoss A/S © 2020.09
Electrical Installation
VLT® Refrigeration Drive FC 103
Operating Guide
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