Grounding - Danfoss Vacon OPTEA Operating Manual

VACON® NXP Advanced Safety Options
Operating Guide
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.

2.4 Grounding

Ground the AC drive in accordance with applicable standards and directives.
DAMAGE TO THE AC DRIVE FROM INSUFFICIENT GROUNDING
Not using a grounding conductor can damage the drive.
-
Make sure that the AC drive is always grounded with a grounding conductor that is connected to the grounding terminal
that is identified with the PE symbol.
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
• 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
S ≤ 16
16 < S ≤ 35
35 < S
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
• 2.5 mm if there is mechanical protection, and
2
• 4 mm 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.
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.
22 | Danfoss A/S © 2021.06
N O T I C E
C A U T I O N
W A R N I N G
2
] The minimum cross-sectional area of the protective earthing con-
ductor in question [mm
S
16
S/2
N O T I C E
2 2
Cu or 16 mm Al. OR
2
]
AQ319736045637en-000101 / DPD01798
Safety