ABB ACS850-04 series, Hardware Manual

Page: 59 / 164

Planning the electrical installation
59
Additional US requirements
Use type MC continuous corrugated aluminum armor cable with symmetrical
grounds or shielded power cable 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. For
drives rated over 100 amperes, the power cables must be rated for 75
°
C (167
°
F).
Conduit
Couple separate parts of a conduit 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.
Selecting the control cables
Shielding
All control cables must be shielded.
Use a double-shielded twisted pair cable for analog signals. This type of cable is
recommended for the pulse encoder signals also. Employ one individually shielded
pair for each signal. Do not use common return for different analog signals.
Insulation jacket
Copper wire screen
Helix of copper tape
or copper wire
Cable core
Inner insulation