Electronic Systems for Type B RCBO/RCCB

Electronic Systems at Type B RCBO/RCCB

In general, the electronic system at type B RCBO/RCCB can be categorized by the design of residual current detection systems as follows.

• Single detection system (Sole VD system): This system utilizes voltage-dependent (VD) fluxgate technology to effectively detect a wide range of currents, including sinusoidal AC residual current, pulsating DC residual current, composite residual currents with frequencies up to 1000 Hz, and smooth DC residual current.

• Hybrid detection system (Hybrid VI and VD systems): This system combines two subsystems. One sub-system is adept at detecting sinusoidal AC residual current and pulsating DC residual current, independent of line voltage (VI). The other sub-system employs voltage-dependent (VD) fluxgate technology to detect smooth DC residual current.

Single detection system
Hybrid detection system
To detect DC smooth current, “fluxgate” technologies are widely used in the electronic systems of type B RCBO/RCCB. However, the electronic system of type B RCBO/RCCBs is much more than a fluxgate current sensor, in order to provide precise tripping for electrical protection and avoid nuisance tripping that interrupts continuous power supply.

Electronic Systems at Type B RCBO/RCCB

Complete electronic system of VD Type B RCBO/RCCB

The electronic system of voltage-dependent(VD) type B RCBO/RCCB typically consists of
  • Summation current transformer (Fluxgate sensing coil)
  • Fluxgate sensing circuit
  • Electronic amplifier
  • Trip relay
Although the basic operation principle of type B VD RCDs seems similar to type AC/A VD RCDs, the fundamental technologies used to detect various kinds of residual currents are different. The electronic system of AC/A VD RCDs uses the linear input/output of the summation current transformer to measure the residual current, while the electronic system of type B VD RCDs generates a pulse via the excitation coil and then uses the change of the sensing coil saturation’s point symmetry to measure the residual current.
complete electronic system of a VD Type B RCBO RCCB
Example of the complete electronic system of a VD Type B RCBO/RCCB
example of the VD sub system of hybrid Type B RCBO RCCB

Example of the VD sub system of hybrid Type B RCBO RCCB

VD sub-system of hybrid Type B RCBO/RCCB

The VD sub-system of hybrid type B RCBO/RCCB consists of
  • Summation current transformer (Fluxgate sensing coil)
  • Fluxgate sensing circuit
The VD sub-system can be supplied by the voltage between any two poles, and it can send fault signal output to a permanent magnet relay. Such an electronic system is mainly used for type B RCBO/RCCB compliant with EN 62423 and does not allow for the VD design to detect sinusoidal AC residual current and pulsating DC residual current. 

Why to use our electronic systems for your type B RCBO/RCCB

The lifespan of our RCBOs/RCCBs integrated with electronic systems begins with their launch by the original equipment manufacturers (OEMs). Ensuring a high standard throughout the extended lifespan of industrial products involves more than just electronic system development. It encompasses aspects like robust supply chain management and responsive support and service. We enhance the value we provide to our customers by focusing on the following key perspectives.

 

  • Advanced technologies: fluxgate current sensing technologies specifically optimized for residual current protection, with proven records in the applications of EV charging and inverters
  • Trustworthy Quality: Products designed following strict internal standards and produced by recognized assembly partners. In particular, we have a dual supply chain with industrial-recognized upstream partners from Jiangsu Province in China, and the DACH region in Europe.
  • Shortened project period: Our experts and project managers have broad experience in designing electronic systems for many miniature circuit breaker platforms (C60/65, L7, LS63, etc.), which helps shorten the integration period to 6-12 months for full production.
  • Cost-effective solution: We provide not only electronic systems for your type B RCBO/RCCB with excellent performance-price ratios, but also help our customers build up large-scale manufacturing and testing capability without big investment.
  • Professional support & service: An experienced team with industrial expertise to support customers and partners. We use a systematic product life cycle management system, to ensure OEMs are well supported.
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