Safety vacon • 7
Local contacts: http://drives.danfoss.com/danfoss-drives/local-contacts/
1
1.3 Grounding and earth fault protection
The touch current of the drive is more than 3.5 mA AC. 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.
a) The protective grounding conductor must have a cross-sectional area of minimum 10 mm
2
Cu or
16 mm
2
Al. OR
b) There must be an automatic disconnection of the mains, if the protective grounding conductor
breaks. See Chapter 5 "Installation". OR
c) There must be a terminal for a second protective grounding conductor in the same cross-
sectional area as the first protective grounding conductor.
The values of the table are valid only if the protective grounding conductor is made of the same
metal as the phase conductors. If this is not so, the cross-sectional area of the protective grounding
After having disconnected the Active Front End from the AC supply, wait until the fan
stops and the indicators on the keypad go out (if no keypad is attached see the indica-
tor through the keypad base). Wait 5 more minutes before doing any work on Active
Front End connections. Do not even open the cover before this time has expired.
Do not use spare parts that are not from the manufacturer. Using other spare parts
can cause damage to the drive.
Do not touch the components on the circuit boards. Static voltage can cause damage
to these components.
Prevent radio interference. The AC drive can cause radio interference in a domestic
environment.
NOTE!
If you activate the autoreset function, the system starts automatically after an auto-
matic fault reset. See the VACON
®
NX AFE Application Manual.
NOTE!
If you use the AC drive as a part of a machine, the machine manufacturer must sup-
ply a mains disconnection device (refer to EN 60204-1).
The AC drive must always be grounded with a grounding conductor that is connected
to the grounding terminal that is identified with the symbol .
Not using a grounding conductor can cause damage to the drive.
Table 2. Protective grounding conductor cross-section
Cross-sectional area of the phase
conductors (S) [mm
2
]
The minimum cross-sectional area of the
protective grounding conductor in question [mm
2
]
S ≤ 16 S
16 < S ≤ 35 16
35 < S S/2
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