Power

Harmonic filters designed for “out of reach” locations

7th January 2014
Staff Reporter
0

Designed to meet IEEE-519, the PB-W (Wall-Mount) Series of three-wire and four-wire active (3x200VAC to 3x480VAC) harmonic filter modular systems has been announced by Schaefer. The systems are scalable, with the wall-mount versions designed for mounting in small and confined areas, as well as required “out of reach” locations.

Featuring ultra-fast (21μs) reactive power compensation, the harmonic filters also have a 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 <300μs, 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 - this can lead to the malfunctioning of the system, due to the large quantities of harmonics, which result 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.

The filters are designed to improve power quality for tower buildings as well as automation, wind turbine and a wide range of industrial applications.

 

 

 

 

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