27
Motor cables
To ensure the EMC compatibility and minimize noise level and leakage currents, keep the
motor cable as short as possible (use shielded cables only if the total length exceeds 1.5
meters).
Additional component line choke (coil)
Line coils are available as an option and should be mounted between the HYDROVAR and
the main fuse. The Line coil should be as near as possible to the HYDROVAR (max. 30cm).
Advantages:
•
better efficiency
•
reduction of harmonic currents
For the following applications additional line chokes are strongly recommended:
•
high short circuit currents
•
compensation-plants without a coil
•
asynchronous motors which are responsible for a voltage drop >20% of the line
voltage
EMC summary
•
Install potential equalization according to local regulations
•
Do not install the power-cables in parallel to signal-cables
•
Use screened signal-cables
•
Connect both ends of the screen of the motor cable to ground
•
Connect only one end of the screen of a signal-cable to ground
•
Motor-cable as short as possible
•
Pigtails should be prevented
9.3
Recommended Cable Types
To ensure the above mentioned points
and
to guarantee EMC compatibility and correct
function of the HYDROVAR the recommended cable types should be used.
Application Recommended
cable-type
- Motor-cables HV 2.015-2.022
HV 4.022 – 4.030- 4.040
HV 4.055-4.075
HV 4.110
HV 4.150 – 4.185
HV 4.220
4G1,5 + (2 x 0.75)
4G1,5 + (2 x 0,75)
4G2,5 + (2 x 0,75)
4G 4 + (2 x 0,75)
4G6 + (2 x 0,75)
4G10 + (2 x 0,75)
- Control- and signal- cables
JE-Y(ST)Y … BD
JE-LiYCY … BD
- Cables connected to RS485 interface
JE-Y(ST)Y 2 x 2 x 0,8 BD
