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

Cost saving

• Reduced machine downtime due to failures and malfunctions
• Longer service life of motors
• Reduction of active power losses due to harmonics
• Risk minimisation in the supply of control systems and instrumentation and control technology

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
• High filter efficiency ( > 97% )
• Automatic standby function

Sustainability

• Easy expandability in case of changing filter requirements
• Compact and robust design

Technological superiority

• Automatic detection of network resonances
• No uncontrolled feed-in into the customer network
• Multilevel protection strategy
• Interference-resistant fibre optic cables to the power sections