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10 Electrical Installation Considerations
10.1 Safety Instructions
W A R N I N G
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.
W A R N I N G
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.
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 certified electrical installer.
For electrical safety
According to the standard EN 61800-5-1, 1 or more of these conditions for the protective circuit must be true. The connection must
be fixed.
The protective earthing conductor must have a cross-sectional area of minimum 10 mm
2
(8 AWG) Cu or 16 mm
2
(6 AWG), OR
There must be an automatic disconnection of the mains if the protective earthing conductor breaks, OR
There must be a terminal for a 2
nd
protective earthing conductor in the same cross-sectional are as the 1
st
protective earthing
conductor.
Cross-sectional area of the phase conductors (S) [mm
s
(AWG)]
The minimum cross-sectional area of the protective earthing con-
ductor in question [mm
2
(AWG)]
S≤16 (6)
S
16 (6)<S≤35 (2)
16 (6)
35 (2)<S
S/2
The values of the table are only valid if the protective earthing conductor is made of the same metal as the phase conductors. If this
is not the case, the cross-sectional area of the protective earthing conductor must be determined in a manner that produces a con-
ductance equivalent to that which results from the calculations in the table.
The cross-sectional area of each protective earthing conductor that is not a part of the mains cable or the cable enclosure must be a
minimum of:
25 mm
2
(14 AWG) if there is mechanical protection, AND
4 mm
2
(12 AWG) if there is no mechanical protection. With cord-connected equipment, ensure that the protective earthing con-
ductor in the cord is the last conductor to be interrupted if the strain relilef mechanism breaks.
Adhere to the local regulations on the minimum size of the protective earthing conductor.
Further instructions for electrical safety:
AJ300847815559en-000101 / 130R0337 | 105
Danfoss A/S © 2020.09
Electrical Installation
Considerations
VLT® AQUA Drive FC 202
Design Guide