Installing Power Wiring 5-9
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.
Standard
(Option 2)
Tray rated 600V,
75°C or 90°C (167°F
or 194°F) RHH/
RHW-2
Shawflex 2ACD/
3ACD or equivalent
• Three tinned copper conductors with
XLPE insulation
• 5 mil single helical copper tape (25%
overlap min.) with three bare copper
grounds in contact with shield
• PVC jacket
Class I & II;
Division I & II
Tray rated 600V,
75°C or 90°C (167°F
or 194°F) RHH/
RHW-2
• Three tinned copper conductors with
XLPE insulation
• 5 mil single helical copper tape (25%
overlap min.) with three bare copper
grounds in contact with shield
• PVC 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)
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