Processes with high automatization often contain VFDs which causes harmonics in the power supply. This can affect machineries and could cause downtime in production lines like at REWE in Dortmund.
 |
|
배경REWE Dortmund Großhandel eG is a federation of over 300 independent retail dealer and supplies approx. 540 식료품 점. The center is the 100.000 m² warehouse and distribution center in Dortmund-Asseln with affiliated butcher. After a fire destroyed the butcher in 2009, it had been rebuild and expended in 2011 에 18.000 평방 미터 대형 정육점. Since end of 2011 REWE produces 250 식료품 점과 최대 고기 톤 25 소시지의 톤 매일. 새로운 정육점 예술 물류 및 육류 가공 시스템의 상태를 포함. 도전The new meat cutter and the included VFDs creating the typically current harmonics of a six-pulse-converter (5일, 7일, 11일, 13일, 등). These harmonics result in commutation notches in the voltage which influences the whole process. It causes disturbances in the light and blackouts. Furthermore it influenced the sausage stuffing and caused long production stops which disturbs the process flow. Occasionally up to 50 % of the employees had to go home for the day caused by disturbances in the process. |
전에:
후:
|
Solution – ADF Active Dynamic Filter with harmonics compensationREWE decided to use a 컴 시스 ADF Active Dynamic Filter to eliminate the problems in the power supply. The installed system consists of one ADP P300-300/480 with a capacity of 300 A harmonics compensation to provide the needed harmonic power for the meat cutter. 결과After the installation and short commissioning, all disturbing harmonics have been canceled and the commutation notches disappeared. For the first time it was possible to start all meat cutter at the same time, without any effect on the light or the sausage stuffing process. |
|
이러한: +46 46 286 35 00 • 팩스: +46 46 286 35 05
E-메일:info@comsys.se