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58 Planning the electrical installation
Not allowed power cable types
Generator cable shield
If the generator cable shield is used as the sole protective earth conductor of the
generator, make sure that the conductivity of the shield is sufficient. See subsection
above, or IEC 61800-5-1.
To effectively suppress radiated and conducted radio-frequency emissions, the cable
shield conductivity must be at least 1/10 of the phase conductor conductivity. The
requirements are easily met with a copper or aluminum shield. The minimum requirement
of the generator cable shield of the converter is shown below. It consists of a concentric
layer of copper wires with an open helix of copper tape or copper wire. The better and
tighter the shield, the lower the emission level and bearing currents.
A four-conductor system (three phase conductors and a PE conductor in a PVC
conduit)
Corrugated cable with three phase conductors and a protective conductor or
cable in EMT
conduit
A well-shielded (Al/Cu shield) four-conductor system (three phase conductors
and a PE conductor or four conductors)
Symmetrical shielded cable with individual shields for each phase conductor is
not allowed on any cable size for grid and generator cabling.
1
Insulation jacket
2
Helix of copper tape or copper wire
3
Copper wire screen
4
Inner insulation
5
Cable core
PVC
EMT
PE
1
3
4
5
2
Summary of Contents for ACS880-87LC-4000A/4021A-7
Page 4: ......
Page 10: ...10 ...
Page 17: ...Safety instructions 17 1 3 2 4 5 6 7 ...
Page 18: ...18 Safety instructions 8 9 ...
Page 28: ...28 Introduction to the manual ...
Page 52: ...52 Mechanical installation ...
Page 66: ...66 Planning the electrical installation ...
Page 74: ...74 Electrical installation Diagrams for the customer connections are presented below ...
Page 75: ...Electrical installation 75 optional Fast shutdown ...
Page 85: ...Maintenance 85 b c a Air flow direction 2 3 4 6 ...
Page 87: ...Maintenance 87 2 5 4 ...
Page 88: ...88 Maintenance 7 Arrow indicating the air flow direction 5 6 6 ...
Page 90: ...90 Maintenance Air flow circulation b a ...
Page 106: ...106 Maintenance ...
Page 124: ...124 Control units of the converter ...
Page 126: ...126 Dimension drawings ...
Page 127: ...Dimension drawings 127 ...
Page 128: ...128 Dimension drawings ...
Page 142: ...142 Cooling and heating ...