SAFETY
vacon • 3
24-hour s358 (0)201 212 575 • Email: [email protected]
1
1.4
Earthing and earth fault protection
The Vacon 8000 Solar inverter must always be earthed with an earthing conductor connected to the
earthing terminal marked with
.
The touch current of Vacon 8000 Solar exceeds 3.5mA AC. According to EN62109-1, one or more of
the following conditions for the associated protective circuit shall be satisfied:
A fixed connection and
a) the
protective earthing conductor
shall have a cross-sectional area of at least 10 mm
2
Cu or 16
mm
2
Al.
or
b) an automatic disconnection of the supply in case of discontinuity of the
protective earthing con-
ductor
. See chapter 4.
or
c) provision of an additional terminal for a second
protective earthing conductor
of the same cross-
sectional area as the original
protective earthing conductor
.
The cross-sectional area of every protective earthing conductor which does not form a part of the
supply cable or cable enclosure shall, in any case, be not less than
•
2.5 mm
2
if mechanical protection is provided or
•
4 mm
2
if mechanical protection is not provided. For cord-connected equipment, provisions shall
be made so that the protective earthing conductor in the cord shall, in the case of failure of the
strain-relief mechanism, be the last conductor to be interrupted.
However, always follow the local regulations for the minimum size of the protective earthing
conductor.
CAUTION!
Table 1.
Cross-sectional area of phase
conductors
(
S
)
[mm
2
]
Minimum cross-sectional area of the corresponding
protective earthing conductor
S
≤
16
16 <
S
≤
35
35 <
S
S
16
S
/2
The values above 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 conduc-
tor
shall be determined in a manner which produces a conductance equivalent to that which
results from the application of this table.
13006.emf
