Harmonic Solutions in Mumbai

Harmonic Solutions

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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. Harmonic Filtering Solutions   Active Harmonic Filters With L&T’s active harmonic filters, reduce your THD levels to within IEEE/CEA limits. These filters are IGBT-based power converters. This filter injects negative of the harmonic current resulting in practically no harmonic distortion. Phase balancing and power factor correction is also achieved. Features :- 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 Reactors – Harmonic Filtering Detuned harmonic filters are the series combination of a reactor and power capacitor. This filter offers higher impedance for high frequency harmonics. This prevents harmonic resonance and amplification. Features :- Available as 7% (189 Hz) & 14% (133 Hz) detuned filters Copper & Aluminium wound reactors Very low operating losses - 3 to 5 W / kVAr High linearity - 1.8 times the rated current Low noise Auto-thermal cut-off