ABB ACS800-04, Hardware Manual

Page: 48 / 118

Planning the electrical installation
48
Additional US requirements
Type MC continuous corrugated aluminum armor cable with symmetrical grounds or
shielded power cable must be used for the motor cables if metallic conduit is not
used. For the North American market, 600 V AC cable is accepted for up to
500 V AC. 1000 V AC cable is required above 500 V AC (below 600 V AC). For
drives rated over 100 amperes, the power cables must be rated for 75
°
C (167
°
F).
Conduit
Separate parts of a conduit must be coupled together, bridge the joints with a ground
conductor bonded to the conduit on each side of the joint. Bond the conduits also to
the drive enclosure and motor frame. Use separate conduits for input power, motor,
brake resistor, 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.
Note : Do not run motor wiring from more than one drive in the same conduit.
Armored cable / shielded power cable
Six conductor (3 phases and 3 ground) type MC continuous corrugated aluminum
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.
Power factor compensation capacitors
Power factor compensation is not needed with AC drives. However, if a drive is to be
connected in a system with compensation capacitors installed, note the following
restrictions.
WARNING! Do not connect power factor compensation capacitors or harmonic
filters to the motor cables (between the drive and the motor). They are not meant to
be used with AC drives and can cause permanent damage to the drive or
themselves.