Rockwell Automation MD65 User Manual Version 2.0 - Manual (Page 34)

5-10 MD65 AC Drive User Manual
5.7 Reflected Wave Protection
The drive should be installed as close to the motor as possible.
Installations with long motor cables may require the addition of
external devices, such as reactors, to limit voltage reflections at the
motor (reflected wave phenomena). Contact Reliance Electric for
recommendations.
The reflected wave data applies to all frequencies 2 to16 kHz. For
240 V ratings, reflected wave effects do not need to be considered.
5.8 Output Disconnect
The drive is intended to be commanded by control input signals that
will start and stop the motor. A device that routinely disconnects
then reapplies output power to the motor for the purpose of starting
and stopping the motor should not be used. If it is necessary to
disconnect power to the motor with the drive outputting power, an
auxiliary contact should be used to simultaneously disable drive
control run commands.
Class I &
II;
Division I
& II Tray rated 600V,
90°C (194°F) RHH/
RHW-2
Anixter 7V-7xxxx-3G
or equivalent • Three bare copper conductors with
XLPE insulation with impervious
corrugated continuously welded
aluminum armor
• Black sunlight-resistant PVC jacket
overall
• Three copper grounds on #10 AWG and
smaller
Table 5.5 – Shielded Motor Cable Types Acceptable for 200-600 Volt Installations
Location Rating/Type Description
Table 5.6 – Maximum Cable Length Recommendation
Reflected Wave
380-480V Ratings Motor Insulation Rating Motor Cable Only 1
1 Longer cable lengths can be achieved by installing devices on the
output of the drive. Consult factory for recommendations.
1000 Vp-p 15 meters (49 feet)
1200 Vp-p 40 meters (131 feet)
1600 Vp-p 170 meters (558 feet)