Vertiv launches active harmonic filters to improve power quality in industrial applications in India

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VertivTM Liebert® AF4 Active Harmonic Filters Powered by ANN Technology

Mumbai, India [September 4, 2023]: Vertiv (NYSE: VRT), a global provider of critical digital infrastructure and continuity solutions, today announced the launch of the Vertiv™ Liebert® AF4, a set of active harmonic filters powered by artificial neural network (ANN) technology, designed to address the increasing importance of power quality in the facility electrical distribution system in India.

An increasing number of electronic components have been deployed across manufacturing processes, and many of the electronic components can distort the current from the source. This can affect the quality of the source voltage waveform, impairing the operation or leading to the failure of the components. Therefore, it is of paramount importance to improve the power quality in the distribution system to achieve continuity in the production process and reduce equipment maintenance costs and downtime. The Liebert® AF4 is designed to efficiently address these waveform distortions.

The Liebert AF4 leverages high-speed Insulated-Gate Bipolar Transistor (IGBT) technology, connected in parallel with the load, and improves power quality management in manufacturing and data centre facility environments, irrespective of the loading condition. Capabilities include:

  • Mitigates harmonic currents
  • Improves the power factor
  • Balances three-phase source currents
  • Compensates for neutral harmonic currents

The Liebert AF4’s HMI 7-inch capacitive touchscreen display is embedded with an adaptive artificial neural network control algorithm that enables the best-in-class dynamic response time of 100 microseconds. Operating on an intelligent ANN-based control technique, the Liebert AF4 accurately identifies the composition of downstream load currents, including active, reactive, harmonic, and unbalanced components. Through precise control of IGBTs, the Vertiv™ Liebert® AF4 effectively eliminates unwanted harmonic components at the load end.

“Electrical distribution power quality becomes even more crucial with today’s industry4.0 technology-driven facilities to ensure seamless and uninterrupted operations. At Vertiv, we understand the evolving needs of our customers and remain committed to supporting them with innovative and reliable solutions”, said Vikas Srivastava, director, medium/large AC power offering (India), Vertiv. “The Liebert AF4 is a testament to our dedication to empowering industrial environments with advanced power solutions. We will continue to innovate our offerings to meet the ever-evolving business landscape and support our customers as they navigate power-related challenges”.

For more information about Liebert® AF4 and other Vertiv solutions, visit

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