7200GS Manual - TECO-Westinghouse Motor Company
7200GS Manual - TECO-Westinghouse Motor Company
7200GS Manual - TECO-Westinghouse Motor Company
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CAUTION<br />
Lead size should be determined taking into account voltage drop of leads. Voltage<br />
drop can be obtained by the following equation: select such lead size that voltage<br />
drop will be within 2% of normal rated voltage.<br />
phase-to-phase voltage drop (V)<br />
= 3 x lead resistance ( Ω /km) X wiring distance(m) x current(A) X 10 -3 .<br />
Wiring length between inverter and motor.<br />
If total wiring distance between inverter and motor is excessively long and inverter<br />
carrier frequency (main transistor switching frequency) is high, harmonic leakage<br />
current from the cable will increase to effect the inverter unit or peripheral devices.<br />
If the wiring distance between inverter and motor is long, reduce the inverter<br />
carrier frequency.<br />
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