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Wall-Mounted Active Harmonic Filters incorporate PFC.

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Wall-Mounted Active Harmonic Filters incorporate PFC.
Wall-Mounted Active Harmonic Filters incorporate PFC.
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January 9, 2014 - Comprising 3- and 4-wire active (3 x 200 Vac to 3 x 480 Vac) harmonic filter modular systems, wall-mount Power Balance (PB-W) Series monitors current signal and compensates for unwanted elements of measured current. Scalable solutions, designed to meet IEEE-519, eliminate harmonic oscillations to improve power quality. Features include 21 Ásec reactive power compensation, phase compensation current of 60–300 A extendable, harmonic correction to 50th order, and response time of <300 Ásec.

Wall-Mount Active Harmonic Filter - Cost Effective Power Quality Modules with PFC

Schaefer, Inc.
45 South Street
Hopkinton, MA, 01748

Press release date: January 6, 2014

Hopkinton, MA – Schaefer Inc. is proud to introduce our new PB-W (Wall-Mount) Series of three-wire and four-wire active (3x200VAC to 3x480VAC) harmonic filter modular systems that are designed to meet IEEE-519. The Power Balance (PB-W) family is scalable and offers a cost-effective solution for improving power quality for tower buildings as well as automation, wind turbine and a wide range of industrial applications. The Wall-Mount versions are ideal for mounting in small and confined areas, as well as the required “out of reach” locations.

These active harmonic filters have ultra-fast (21Ás) reactive power compensation, phase compensation current of 60A to 300A extendable and harmonic correction is provided for harmonics to the 50th order. Additional features include flicker compensation, ultra-fast response time of <300Ás, load balancing between phases and unload neutral wire and grid resonance detection. Communication connections via Ethernet and Ethercat system, Ethernet TCP/IP interface permits control via browser. Subsystems display control unit, active sensor unit, ModBus, PQ Analyzer.

Harmonic currents generate power that cannot be used and consumes electrical system capacity. Large quantities of harmonics can lead to malfunctioning of the system that results in downtime and increase in operating costs. The PB-W Series active harmonic filter monitors the current signal and compensates for the unwanted elements of the measured current, thus eliminating harmonic oscillations and consequently costs savings for reactive energy.

For further information and unit pricing contact – Jeff Roffee, Director of Power Systems.
View detailed product specifications or visit us at

Contact Schaefer, Inc., 45 South Street, Hopkinton, MA 01748.
Tel: 508/435-6400 Fax: 508/435-6401
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