Cost-effective solution improves power quality and protects connected equipment

EMIS has announced the availability of the TPQH3411 passive harmonic filter, designed and manufactured to provide a cost-effective solution for harmonic mitigation in power systems, while maintaining THID in compliance with the current and voltage requirements of IEEE 519.

Three-phase passive harmonic filters are employed to minimise harmonic distortion, particularly in installations with high levels of nonlinear loads, such as VFDs, UPS units, and rectifiers. They function by using passive components, such as 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 divert harmonic content effectively. The capacitive elements in these filters offer reactive power compensation, enhancing the system’s power factor.

Key specifications include:

• Operating Voltage - 415 VAC
• Operating Frequency - 50HZ
• Power Rating - 1.1KW to 250KW
• Mounting - Floor/wall

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 decrease overheating, mechanical stress, and vibrations in motors and transformers caused by harmonic distortion.

Applications for the EMIS TPQH3411 passive harmonic filter include VFDs, induction furnaces, robotics, conveyors, high-power pumps, blowers, motor drives, ups systems and switch-mode power supplies, crushers, rolling mills, large motors, compressors, offshore drilling systems, pumps, elevators, lighting with electronic ballasts, inverter-based wind/solar systems, and cement, paper, and steel industries.