4
vacon • 23
Power cabling
Figure 14.
NOTE
: The EMC requirements are fulfilled at factory defaults of switching frequencies (all
frames).
NOTE:
If safety switch is connected the EMC protection shall be continuous over the whole ca-
ble installation.
4.1
Circuit breaker
Please, disconnect the drive via an external circuit breaker. You have to provide a switching de-
vice between supply and main connection terminals.
When connecting the input terminals to the power supply using a circuit breaker, observe that
this is of
type B or type C
and chose it with a
capacity of 1.5 to 2 times of the inverter’s rated
current
(see Table 19 and Table 20).
4.2
UL standards on cabling
To meet the UL (Underwriters Laboratories) regulations, use a UL-approved copper cable. Use
Class 1 wire only.
The units are suitable for use on a circuit capable of delivering no more than 100,000 rms sym-
metrical amperes, 600V AC maximum.
4.2.1
Cable dimensioning and selection
Table 7 shows the minimum dimensions of the Cu cables and the corresponding fuse sizes.
These instructions apply only to cases with one motor and one cable connection from the AC
drive to the motor. In any other case, ask the factory for more information.
Shield
PE conductors
Shield
PE conductor
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: [email protected]
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