The increasing use of modern power electronic apparatus (drives, uninterruptible power supplies, etc.) produces nonlinear current and thus loads the network with harmonics. The capacitance of the power capacitor forms a resonant circuit in conjunction with the feeding transformer. Experience shows that the self-resonant frequency of this circuit is typically between 250 and 500 Hz, i.e. in the region of the 5th and 7th harmonics. Typical loads requiring harmonic filtering include 6 pulse drives (AC / DC), 3 phase UPS, frequency converters

• 30-600 A Active filter in 3 phase 3 wire/4wire
• Stand-alone & modular units
• Response time less than 1 ms/li>
• Easy diagnosis of fault conditions with alarms
• Easy configuration & parameter monitoring with LCD touch screen HMI