Safety 9
Grounding
These instructions are intended for all who are responsible for the grounding of the
inverter.
WARNING
! Ignoring the following instructions can cause physical injury or death,
increased electromagnetic interference and equipment malfunction.
•
Ground the inverter, motor and adjoining equipment to ensure personnel safety in all
circumstances, and to reduce electromagnetic emission and interference.
•
Make sure that grounding conductors are adequately sized as required by safety
regulations.
•
When shielded cables are used, make a 360° high frequency grounding of cable
entries at the cabinet lead-through to suppress electromagnetic disturbances. In
addition, connect the cable shields to protective earth (PE) to meet safety regulations.
Note
:
•
The power cable shields are suitable for equipment grounding conductors only when
adequately sized to meet safety regulations.
•
Standard IEC/EN 62109, 5.2.5 requires that as the normal touch current of the inverter
is higher than 3.5 mA AC or 10 mA DC, you must use a fixed protective earth
connection.
•
A four-conductor system is allowed for input cabling, but shielded symmetrical cable is
recommended. To operate as a protective conductor, the shield conductivity must be
as follows when the protective conductor is made of the same metal a the phase
conductors.
•
Automatic disconnection of the supply must be provided in case of discontinuity of the
protective earthing conductor.
•
A second protective earthing conductor of the same cross-sectional area as the
original protective earthing conductor must be provided.
Cross-sectional area of
the phase conductors
S (mm
2
)
Minimum cross-sectional area of the
corresponding protective conductor
S
p
(mm
2
)
S
16
S/2
S
16
≤
16
S
35
≤ ≤
35
S
<
Summary of Contents for ACS355 series
Page 1: ...ABB machinery drives Supplement ACS355 Solar pump inverter N827...
Page 4: ......
Page 10: ...10 Safety...
Page 14: ...14 Introduction...
Page 18: ...18 Operating principle and hardware description...
Page 30: ...30 Start up and controls...
Page 36: ...36 Program features...
Page 66: ...66 Actual signals and parameters...
Page 70: ...70 Fault tracing...
Page 76: ...76 Technical data...