Scope of application

The PQFM active filter is used to filter harmonic currents, reactive current compensation and load current balancing between the phases. phases. The filter is preferably used in industrial networks with non-linear three-phase consumers (frequency converters, UPS systems, etc.). used.

Description

The PQFM active filter is connected in parallel to the mains. From the harmonic currents are fed into the supply network from the active filter. which are in phase opposition to the harmonic currents of the load. load. At the connection point, the selected At the connection point, the selected harmonics are reduced to at least 97% of the filter's nominal current. Each active filter consists of a basic unit and up to 7 extension units. extension units. Adjacent nominal current groups may be combined The distance between the smallest and the largest filter unit may be max. be max. one nominal current group.

Advantages

Operational safety, cost savings

• Reduction of the risk of overload and fire in the neutral conductor
• Reduction of active power losses due to harmonics
• Reduction of conducted EMC interference
• Risk minimisation in the supply of EDP equipment

Compliance with EMC directives

• Fulfilment of OS compatibility levels (up to the 50th harmonic!)
• Compliance with the regulations of the energy supplier
• Economical use of filter resources
• Selective compensation of single or multiple harmonics
• Adjustable limits and filter strategies
• Reactive current compensation with adjustable cos ϕ
• Load current balancing between the phases
• Load current balancing between phases and neutral conductor
• High filter efficiency ( > 97% )
• Automatic standby function

Sustainability

• Easy extensibility
• Compact and robust design