Application example

www.myecosine.com

ECOsine™ ActiveIncreased reliability inbuilding technology

For a unique, internationally-esteemed concert hall like the Lucerne KKL (Culture and Conference Centre), it is essential to

have electrical and electronic systems that function with absolute reliability at all times.

Above-average failure rates and signs of wear

In the Lucerne KKL, a large number of single-phase and three-phase non-linear loads are used. These include lighting equip-

ment, for example dimmers for spotlights, stage machinery with numerous motor drives, sound equipment, HVAC systems and

the entire IT infrastructure with the switched power supplies that are typically used.

These loads draw mostly non-sinusoidal current from the mains – current with a large harmonic component. The side-effects

typically associated with this have led to above-average failure rates and signs of wear in the lighting, electronic ballasts and

power units, as well as a high thermal load on the infrastructure, especially the neutral conductors. Because mains harmonics

lie in the audible frequency range, there was also repeatedly interference in the audio range.

Requirement for a sustainable remedy

An independent measurement institute was commissioned by the responsible party to perform a comprehensive analysis of the

mains quality according to the D-A-CH-CZ (Technical rules for assessing mains feedback). The goal of this investigation was to

identify causes and approaches to solving these problems. The following requirements were defined:

■ Reducing the interference with the sound system

■ Eliminating premature equipment failures

■ Reducing the thermal load on the electrical installations, especially the neutral conductors

ECOsine™ Active masters all of the challenges

The measurement institute came to the conclusion that the best way to

deal with the problems would be 12 decentrally installed active filters.

They opted for FN3430 series ECOsine™ Active filters from Schaffner,

modern active filters with four-wire technology and compensation cur-

rents of 60 and 120A. All of the available filter functions were required:

■ Harmonics compensation

■ Reactive-power compensation

■ Load balancing

All of these tasks can be accomplished by one and the same device.

The most modern and fastest filters currently on the market provide

optimal results even with phase-controlled dimmers. What is more, the

60A active filters from Schaffner are impressive for their superior EMC

and minimal audible noise generation, important features in building

technology and especially in the sensitive environment of a concert hall.

The show will go on – thanks to ECOsine™ Active

Compensation of dimmers (phase angle control)

Current waveforms on mains and load side from the connection point of the active filter.

Non-linear load current waveforms without filtering measures Lighting system compensated and balanced by means of active filter

Compensation and balancing of the lighting system

Mains voltage UL1

Load current L1

Mains current L1

Voltage (above) and current waveforms without filtering measures Voltage (above) and current waveforms with ECOsine™ Active

Improvement of the mains quality of an unbalanced mixed load

Without filtering measures. Dominant frequency 150Hz with peak values over 160A The neutral conductor current is practically eliminated through the used of the active filter.

Compensation of harmonic currents on the neutral conductor

The approval measurements after installation of the active filters show that the problems of harmonic loading, reactive power

consumption and unbalances in the mains have been corrected sustainably. Therefore measurably fewer equipment failures and

malfunctions can be expected.

Thanks to the specific use of ECOsine™ Active, discerning concert audiences are guaranteed entertainment of the highest

standard.

To find your local partner within

Schaffner‘s global network, please go to

www.schaffner.com

© 2010 Schaffner EMC.

Specifications are subject to change

without notice. The latest version of the

data sheets can be obtained from the

website. All trademarks recognized.

Schaffner is an ISO-registered company.

Its products are designed and manufac-

tured under the strict quality and environ-

mental requirements of the ISO 9001 and

ISO 14001 standards.

This document has been carefully checked.

However, Schaffner does not assume any

liability for errors or inaccuracies.

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