April 17, 2012

Power factor correction: Controllers for single-phase networks

TDK Corporation has extended its range of EPCOS power factor controllers. The new BR7000-I controller is designed specifically for single-phase networks and combines all the performance features and functions of the proven BR6000 series with the benefits of the BR7000 controller.

All information is displayed on a large graphic LCD display with a resolution of 128 x 64 dots. Context-related help texts can be called up at any time via a HELP key. The power factor cos φ is displayed with three digits, and tan φ can also be shown. Three results can be shown simultaneously in display mode. Odd harmonics can be measured and displayed up to the 33rd order, and even harmonics up to the 16th order. The selected harmonics can also be represented in bar charts.

The controller has 12 or 13 outputs. The message and alarm relay parameters may be programmed to open or close. The BR7000-I (ordering code B44066R7012E230) can be combined very effectively with EPCOS capacitor contactors and PFC capacitors.


  • Reactive power: This invariably occurs when the phase angle between current and voltage is shifted. Reactive power is caused by inductive loads such as electric motors and transformers and despite being quite useless, is necessarily generated by power plants.
  • Power factor correction (PFC): Reactive power can be almost completely corrected by connecting-in PFC capacitors. This reduces energy costs and helps protect the environment.

Main applications

  • PFC in single and three-phase industrial networks.

Main features and benefits

  • Large graphic LCD display with a resolution of 128 x 64 dots.
  • Display of a wide range of measured values, including harmonics.

About TDK Corporation

TDK Corporation is a leading electronics company based in Tokyo, Japan. It was established in 1935 to commercialize ferrite, a key material in electronic and magnetic products. TDK's current product line includes passive components, magnetic application products as well as energy devices, flash memory application devices, and others. TDK today focuses on demanding markets in the areas of information and communication technology and consumer, automotive and industrial electronics. The company has a network of design and manufacturing locations and sales offices in Asia, Europe, and in North and South America. In fiscal 2011, TDK posted total sales of USD 10.6 billion and employed about 88,000 people worldwide.

About TDK-EPC Corporation

TDK-EPC Corporation, a TDK group company, is a leading manufacturer of electronic components, modules and systems, headquartered in Tokyo, Japan. TDK-EPC was founded in 2009 from the combination of the passive components business of TDK and the EPCOS Group. The portfolio includes ceramic, aluminum electrolytic and film capacitors, ferrites and inductors, magnets, high-frequency components such as surface acoustic wave (SAW) filter products and modules, piezo and protection components, and sensors. The company markets the product brands TDK and EPCOS.

Further information on the products can be found under www.epcos.com/pfc

Please forward reader inquiries to marketing.communications@epcos.com