Electrical Installation; Safety Instructions; Emc-Compliant Installation; Grounding - Danfoss VLT Decentral Drive FCD 302 Operating Manual

VLT® Decentral Drive FCD 302
Operating Guide

4 Electrical Installation

4.1 Safety Instructions

See 2.1 Safety Precautions for general safety instructions.
INDUCED VOLTAGE
Induced voltage from output motor cables that run together can charge equipment capacitors, even with the equipment turned
off and locked out. Failure to run output motor cables separately or to use shielded cables could result in death or serious injury.
-
Run output motor cables separately or use shielded cables.
-
Simultaneously lock out all the drives.
SHOCK HAZARD
The unit can cause a DC current in the PE conductor. Failure to use a Type B residual current-operated protective device (RCD)
may lead to the RCD not providing the intended protection and therefore may result in death or serious injury.
-
When an RCD is used for protection against electrical shock, only a Type B device is allowed on the supply side.
Overcurrent protection
• Extra protective equipment, such as short-circuit protection or motor thermal protection between drive and motor, is required
for applications with multiple motors.
• Input fusing is required to provide short circuit and overcurrent protection. If not factory-supplied, the installer must provide
fuses. See maximum fuse ratings in
Wire type and ratings
• All wiring must comply with local and national regulations regarding cross-section and ambient temperature requirements.
• Power connection wire recommendation: Minimum 75 °C (167 °F) rated copper wire. See
wire sizes and types.

4.2 EMC-compliant Installation

To obtain an EMC-compliant installation, follow the instructions provided in
the Motor, and 4.10.1 Control
POTENTIAL EQUALIZATION
Risk of burst transient when the ground potential between the drive and the control system is different. Install equalizing cables
between the system components. Recommended cable cross-section: 16 mm

4.3 Grounding

For electrical safety
• Ground the drive in accordance with applicable standards and directives.
• Use a dedicated ground wire for input power, motor power, and control wiring.
• Do not ground 1 drive to another in a daisy chain fashion.
• Keep the ground wire connections as short as possible.
18 | Danfoss A/S © | 2020.07
W A R N I N G
W A R N I N G
7.7.2 Recommended Maximum Pre-fuse Size 25
Wiring.
N O T I C E
A.
7.1 Electrical Data
4.3 Grounding, 4.4 Wiring Schematic,
2
(6 AWG).
AQ267036816112EN-000101 / 130R0208
Electrical Installation
for recommended
4.7 Connecting