Planning the electrical installation
80
A double-shielded cable is the best alternative for low-voltage digital signals but
single-shielded twisted multipair cable (figure b) is also usable.
Run analogue and digital signals in separate, shielded cables.
Relay-controlled signals, providing their voltage does not exceed 48 V, can be run in
the same cables as digital input signals. It is recommended that the relay-controlled
signals be run as twisted pairs.
Never mix 24 V DC and 115 / 230 V AC signals in the same cable.
Relay cable
The cable type with braided metallic screen (e.g. ÖLFLEX LAPPKABEL, Germany)
has been tested and approved by ABB.
Control panel cable
In remote use, the cable connecting the control panel to the drive must not exceed 3
metres (10 ft). The cable type tested and approved by ABB is used in control panel
option kits.
Coaxial cable (for use with Advant Controllers AC 80/AC 800)
• 75 ohm
• RG59, diameter 7 mm or RG11, diameter 11 mm
• Maximum cable length: 300 m (1000 ft)
Routing the cables
Route the motor cable away from other cable routes. Motor cables of several drives
can be run in parallel installed next to each other. It is recommended that the motor
cable, input power cable and control cables be installed on separate trays. Avoid
long parallel runs of motor cables with other cables in order to decrease
electromagnetic interference caused by the rapid changes in the drive output
voltage.
Where control cables must cross power cables make sure they are arranged at an
angle as near to 90 degrees as possible. Do not run extra cables through the drive.
The cable trays must have good electrical bonding to each other and to the
grounding electrodes. Aluminium tray systems can be used to improve local
equalizing of potential.
a
Double-shielded twisted pair
cable
b
Single-shielded twisted multipair
cable
To Next Page
Loading...
