5.6
PREPARING FOR THE CABLE INSTALLATION
•
Before you start, make sure that none of the components of the AC drive is live. Read
carefully the warnings in Chapter 2 Safety.
•
Make sure that the motor cables are sufficiently far from other cables.
•
The motor cables must go across other cables at an angle of 90°.
•
If it is possible, do not put the motor cables in long parallel lines with other cables.
•
If the motor cables are in parallel with other cables, obey the minimum distances (see
Table 32 The minimum distances between cables).
•
The distances are also valid between the motor cables and the signal cables of other
systems.
•
The maximum lengths of shielded motor cables are 300 m (984 ft) (AC drives with power
greater than 1.5 kW or 2 HP), and 100 m (328 ft) (AC drives with power from 0.75 to 1.5
kW or 1 to 2 HP). If the used motor cables are longer than these, speak to the factory to
get more information.
NOTE!
Each parallel cable adds to the total length.
NOTE!
If you use long motor cables (max. 100 m or 328 ft) together with small drives
(≤1.5 kW or ≤2.01 HP), the capacitive current in the motor cable can increase
the measured motor current compared to the actual motor current. Think this
when you set up the motor stall protection functions.
•
If the cable insulation checks are necessary, see Chapter 8.4 Measuring the cable and
motor insulation for instructions.
Table 32: The minimum distances between cables
The distance between
cables [m]
The length of the
shielded cable [m]
The distance between
cables [ft]
The length of the
shielded cable [ft]
0.3
≤ 50
1.0
≤ 164.0
1.0
≤ 200
3.3
≤ 656.1
5.7
CABLE INSTALLATION
5.7.1
FRAMES FR4 TO FR7
NOTE!
For information on how to obey the UL regulations in cable installation, see
Chapter 5.2 UL standards on cabling.
VACON · 58
POWER CABLING
5
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