Additional Grounding Requirements - Iec - ABB ACH580-31 Hardware Manual
Industrial drives
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- Hardware manual (254 pages) ,
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- Installation manual (238 pages)
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conductor must be determined in a manner which produces a conductance
equivalent to that which results from the application of this table.
Cross-sectional area of the phase conduct-
S (mm 2 )
16 < S ≤ 35
1) For the minimum conductor size in IEC installations, refer to
If the protective earth conductor is not part of the input power cable or input
power cable enclosure, the minimum permitted cross-sectional area is:
2
•
2.5 mm
if the conductor is mechanically protected,
or
2
•
4 mm
if the conductor is not mechanically protected. If the equipment is
cord-connected, the protective earth conductor must be the last conductor
to be interrupted if there is a failure in the strain relief mechanism.
￭
Additional grounding requirements – IEC
This section gives grounding requirements according to standard IEC/EN 61800-5-1.
Because the normal touch current of the drive is more than 3.5 mA AC or 10 mA DC:
•
the minimum size of the protective earth conductor must comply with the
local safety regulations for high protective earth conductor current equipment,
and
•
you must use one of these connection methods:
1.
a fixed connection and:
•
a protective earth conductor with a minimum cross-sectional area of
10 mm
permitted),
or
•
a second protective earth conductor of the same cross-sectional area
as the original protective earth conductor,
or
•
a device that automatically disconnects the supply if the protective
earth conductor is damaged.
2. a connection with an industrial connector according to IEC 60309 and a
minimum protective earth conductor cross-section of 2.5 mm
a multi-conductor power cable. Sufficient strain relief must be provided.
Guidelines for planning the electrical installation 73
ors
S ≤ 16
35 < S
2
2
Cu or 16 mm
Al (as an alternative when aluminum cables are
Minimum cross-sectional area of the corres-
ponding protective earth conductor
S p (mm 2 )
Additional grounding requirements –
1)
S
16
S/2
2
as part of
IEC.
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