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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.
The standard EN 61800-5-1 tells that 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
Cu or 16 mm
2
Al. OR
There must be an automatic disconnection of the mains, if the protective earthing conductor breaks. OR
There must be a terminal for a second protective earthing conductor in the same cross-sectional area as the first protective
earthing conductor.
Cross-sectional area of the phase conductors (S) [mm
2
] The minimum cross-sectional area of the protective earthing con-
ductor in question [mm
2
]
S ≤ 16
S
16 < S ≤ 35
16
35 < S
S/2
The values of the table are valid only if the protective earthing conductor is made of the same metal as the phase conductors. If this
is not so, the cross-sectional area of the protective earthing conductor must be determined in a manner that produces a conduc-
tance equivalent to that which results from the application of this 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:
2.5 mm
2
if there is mechanical protection, and
4 mm
2
if there is not mechanical protection. With cord-connected equipment, make sure that the protective earthing conductor
in the cord is the last conductor to be interrupted, if the strain-relief mechanism breaks.
Obey the local regulations on the minimum size of the protective earthing conductor.
N O T I C E
MALFUNCTION OF FAULT CURRENT PROTECTIVE SWITCHES
Because there are high capacitive currents in the AC drive, it is possible that the fault current protective switches do not operate
correctly.
N O T I C E
VOLTAGE WITHSTAND TESTS
Doing voltage withstand tests can damage the drive.
Do not do voltage withstand tests on the AC drive. The manufacturer has already done the tests.
W A R N I N G
SHOCK HAZARD FROM PE CONDUCTOR
The drive can cause a DC current in the PE conductor. Failure to use a residual current-operated protective (RCD) device Type B or
a residual current-operated monitoring (RCM) device can lead to the RCD not providing the intended protection and therefore
can result in death or serious injury.
Use a type B RCD or RCM device on the mains side of the drive.
AQ275638903263en-000601 / DPD00910
42 | Danfoss A/S © 2022.12
Electrical Installation
VACON® NXS/NXP Air-cooled
Operating Guide