EMIS Launches TPQH3411 Three-Phase Passive Harmonic Filter

Global EMC solutions provider EMIS announces the availability of the TPQH3411 passive harmonic filter, designed and manufactured to provide a cost-effective solution for harmonic mitigation in Power Systems by maintaining THID in compliance with the current and voltage requirements of IEEE 519.

Three-Phase Passive Harmonic Filters are used to minimise harmonic distortion, especially in installations with high levels of non-linear loads such as variable frequency drives (VFDs), UPS units and rectifiers. They function by using passive components, resistors, inductors and capacitors in a filter network to suppress unwanted harmonic currents and voltages.

They are typically tuned to specific harmonic orders (e.g.,3rd, 5th, 7th, 11th...), providing low-impedance paths at those frequencies to effectively divert harmonic content. The capacitive elements in these filters offer reactive power compensation, enhancing the system's power factor.

Key specifications include:

Passive harmonic filters are recognised for their simple and robust design, making them a popular and cost-effective solution for mitigating harmonics in power systems. In addition to assisting with compliance with harmonic distortion limits set by standards such as IEEE 519, the filters also help reduce overheating, mechanical stress, and vibrations in motors and transformers caused by harmonic distortion.

Applications for the EMIS TPQH3411 passive harmonic filter include:

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