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Our offered Product range includes Special Purpose Contactor and Harmonic Filtering Solutions.

Special Purpose Contactor

L&T’s range of capacitor duty Contactors is specially designed for capacitor switching applications. As capacitor switching is associated with high inrush current, the contactors are provided with damping resistors which limit the value of inrush current to a safe value. The contactors are used in APFC panels for switching power capacitors. Selection of these capacitors depends on the amount of reactive power compensation required. Separately terminated de-latching contacts for enhanced operational reliability Improved switching performance Dual contact gap for auxiliary contacts Separate termination of damping resistors Encapsulated resistor assembly Wide and chatter-free operating band Higher electrical life Enhanced product safety

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Harmonic Filtering Solutions

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 wire4wire Stand-alone & modular units Response time less than 1 ms Easy diagnosis of fault conditions with alarms Easy configuration & parameter monitoring with LCD touch screen HMI

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  • TK Singh
  • Cincinati, .., United States