Salicru CV50-008-4F, Руководство пользователя, Страница: 134 / 144

134 - 144 Peripheral Options and Parts Appendix C
Name Descriptions
Choke
Prolongues the effective transimitting distance of the inverter because controls the
sudden high voltage provoqued when switching on/off the IGBTs of the inverter.
Recommended when the cable distance between the inverter and the motor is
between 50m and 100m. Please install close to the output terminals of the
inverter
.
Output Sine wave
filter
(LC Filter)
Prolongues the effective transimitting distance of the inverter because controls the
sudden high voltage provoqued when switching on/off the IGBTs of the inverter.
Recommended when the cable distance between the inverter and the motor is
longer than 100m. Please install close to the output terminals of the inverter.
C.3 Power supply
Please refer to Electronical Installation .
 Check that the voltage degree of the inverter complies with the voltage of the supply
power voltage.
C.4 Cables
C.4.1 Power cables
Dimension the input power and motor cables according to local regulations.
•
The input power and the motor cables must be able to carry the corresponding load currents.
• The cable must be rated for at least 70 °C maximum permissible temperature of the conductor in
continuous use.
•
The conductivity of the PE conductor must be equal to that of the phase conductor (same cross-sectional area).
• Refer to chapter Technical Data for the EMC requirements.
A symmetrical shielded motor cable (see the figure below) must be used to meet the EMC requirements of the CE.
A four-conductor system is allowed for input cabling, but a shielded symmetrical cable is recommended.
Compared to a four-conductor system, the use of a symmetrical shielded cable reduces electromagnetic
emission of the whole drive system as well as motor bearing currents and wear.
Note: A separate PE conductor is required if the conductivity of the cable shield is not sufficient for the
purpose.
To function as a protective conductor, the shield must have the same cross-sectional area as the phase
conductors when they are made of the same metal.
To effectively suppress radiated and conducted radio-frequency emissions, the shield conductivity must be at
least 1/10 of the phase conductor conductivity. The requirements are easily met with a copper or aluminum shield.
The minimum requirement of the motor cable shield of the drive is shown below. It consists of a concentric layer
of copper wires. The better and tighter the shield is, the lower the emission level and bearing currents.