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Power Wiring 4-7
4.7 Reflected Wave Protection
When more than one motor is connected to one inverter, total wiring length should be
less than 200m (656ft). Do not use a 3-wire cable for long distances. Due to increased
leakage capacitance between wires, over-current protective feature may operate or
equipment connected to the output side may malfunction. In case of long wire length,
lower carrier frequency or contact Baldor for recommendations.
Table 4.4 – Wire Length Recommendations
Length Between Inverter and Motor Allowable Carrier Frequency
Up to 50 meters Less than 15 kHz
Up to 100 meters Less than 5 kHz
More than 100 meters Less than 2.5 kHZ