Active Harmonic Filters In Printing Applications
Harmonic Filter Restores Power Quality and Reduces Downtime Caused by Harmonics
Problems with power quality often become apparent through problems in production and surrounding equipment such as lighting.
This is what happened at one of the largest printers in Holland.
The printing company consists of two printing plants located in Amsterdam. The plant employs 170 people, producing six daily newspapers and several other free local papers and magazines. The plant prints up to 1 million papers every day with printing presses running almost nonstop.
Poor Power Quality – the Challenge
The printers had been struggling with power quality problems for many years. Flourescent lighting had to be changed continuously as the tubes kept failing. The electrical ballast had to be changed every six months instead of every 5 years. This kept one employee busy 2-3 days a week. In 2011 just the lighting problems and other broken components cost the printers about
300 000 €. In addition to these losses, the plant had power quality related problems during startup of the presses, which resulted in additional losses through production downtime.
Active Harmonic Filters – the Solution
The printing group decided on an investment in power quality and quite literally, a brighter future. Six harmonic filters with a total compensation current of 1800 A were installed to optimize the power grid and reduce harmonics.
Harmonic Filtering Gave Quick Results
Following installation and commisioning of the active harmonic filters all previous problems disappeared. The printing plant can nowuse their printing presses without disturbances from poor power quality. Due to the continuous stops in production and equipment failure, which had been a daily occurrance, the return on investment for the harmonic filtering system was very short.
Both diagrams are “with” filters???
Thank you for pointing that out. The top diagram is without filters.