ABB ACS880-77CC, Hardware Manual

Page: 57 / 128

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Control cable ducts
24 V DC
230 V AC
(120 V AC)
230 V AC
(120 V AC)
24 V DC
Picture on the left: Lead 24 V and 230/120 V control cables in separate ducts into the inside
of the cabinet.
Picture on the right: Not allowed unless the 24 V cable is insulated for 23 V (12 V) or
insulated with an insulation sleeving for 230 V (120 V).
Protecting the converter installation
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Protecting the grid cable in short-circuit situations
Equip the cable with fuses. Size the fuses according to local safety regulations, appropriate
voltage and the rated current of the converter.
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Protecting the generator and generator cable in short-circuit situations
The converter protects the generator cable and the generator in a short-circuit situation
when the generator cable is sized according to the nominal current of the converter. No
additional protection devices are needed.
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Protecting the converter, generator cable and grid cable against
thermal overload
The converter protects itself, the grid cables and generator cables against thermal overload
when the cables are sized according to the nominal current of the converter and ambient
conditions are within the limits specified under ambient conditions in the technical data. No
additional thermal protection devices are needed.
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Protecting the converter against ground faults in the generator or
generator cable
Both the grid-side converter and generator-side converter are equipped with an internal
ground fault protective function to protect them against ground faults in the converter itself,
the generator and generator cable. (This is not a personal safety or a fire protection feature.)
You can disable both ground fault protective functions (not recommended); refer to the
firmware manual.
Planning the electrical installation 57