Conduit; Armored Cable / Shielded Power Cable; Power Factor Compensation Capacitors; Equipment Connected To The Rotor Cable - ABB ACS800 Series Hardware Manual

Conduit

Where conduits must be coupled together, bridge the joint with a ground conductor
bonded to the conduit on each side of the joint. Bond the conduits also to the
converter enclosure. Use separate conduits for input power, generator, brake
resistors, and control wiring. When conduit is employed, type MC continuous
corrugated aluminium armor cable or shielded cable is not required. A dedicated
ground cable is always required. Do not run generator wiring from more than one
converter in the same conduit.

Armored cable / shielded power cable

Six conductor (3 phases and 3 ground) type MC continuous corrugated aluminium
armor cable with symmetrical grounds is available from the following suppliers (trade
names in parentheses):
• Anixter Wire & Cable (Philsheath)
• BICC General Corp (Philsheath)
• Rockbestos Co. (Gardex)
• Oaknite (CLX).
Shielded power cables are available from Belden, LAPPKABEL (ÖLFLEX) and
Pirelli, among others.

Power factor compensation capacitors

Do not connect power factor compensation capacitors or surge absorbers to the
generator cables (between the converter and the generator). They are not designed
to be used with converters, and will degrade generator control accuracy. They can
cause permanent damage to the converter or themselves due to the rapid changes
in the converter output voltage.
If there are power factor compensation capacitors in parallel with the three phase
input of the converter, ensure that the capacitors and the converter are not charged
simultaneously to avoid voltage surges which might damage the unit.

Equipment connected to the rotor cable

Installation of safety switches, contactors, connection boxes, etc.

To minimize the emission level when safety switches, contactors, connection boxes
or similar equipment are installed in the rotor cable (i.e. between the converter and
the rotor):
• EU: Install the equipment in a metal enclosure with 360 degrees grounding for the
shields of both the incoming and outgoing cables, or in another way connect the
shields of the cables together.

Bypass connection

Planning the electrical installation
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