Delta C200 Series Drive Input & Output Choke Details – an input choke smoothens the wave shape of mains current and reduces total harmonic distortion (THD).
When the AC Motor Drive is connected directly to a large-capacity power transformer (500kVA or above) or when a phase lead capacitor is switched, excess peak currents may occur in the power input circuit due to the load changes and the converter section may be damaged. To avoid this, it is recommend using a serial connected AC input reactor at the AC Motor Drive mains input side to reduce the current and improve the input power efficiency.
Output Choke/AC Output Reactor
If the length of cable between AC motor drive and motor is too long, it may make AC motor drive trigger protection mechanism for GF (Ground Fault), OV (Over Current) and the AC motor drive stops running. The cause is the over long motor cable will generate extremely large stray capacitance, make common mode current of 3-phase output get too large and then trigger GF protection mechanism; OC protection is triggered which is caused by stray capacitance of cable-cable and cable-ground are getting larger, and its surge current makes AC motor drive output over large current. To prevent from the common mode current that stray capacitance generates, set up AC output reactor between AC motor drive and motor to increase the high frequency impedance.
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Delta C200 Series Drive Input & Output Choke Details
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