ABB celebrates the miniature circuit breaker’s 90th anniversary. The invention, patented in Germany in November 1924 by Hugo Stotz and his chief engineer, Heinrich Schachtner, made the rapidly increasing electrification of private homes safer and more efficient. Today, nearly every household is equipped with miniature circuit breakers to stop the flow of electricity, protecting people and equipment from electrical fire. Like a police officer who halts traffic at an intersection when there’s an accident, these breakers interrupt the current when something in a home’s or building’s electricity system goes wrong.

Distribution boards are used in several applications such as: utilities, buildings, ports and airports, sport installations, construction sites, industries, railways and communication system (enclosures). Kabeldon low voltage distribution boards feature small dimensions, flexibility, safety, reliability and a clear layout. To ensure high quality, the enclosure is assembled at the factory. The enclosure is then fitted with the required devices. It is a simple matter to wire up the distribution board and put it into service.

Trust is everything and in industrial environments, it is essential to have human-machine interfaces you can count on. Whenever you start or stop a process, the response must be assured. That’s why ABB pilot devices are designed and engineered to deliver total reliability.

The increasing use of modern power electronic apparatus (drives, uninterruptible power supplies, etc) produces nonlinear current and thus influences and loads the network with harmonics (line pollution). The power factor correction or capacitance of the power capacitor forms a resonant circuit in conjunction with the feeding transformer. Experience shows that the selfresonant frequency of this circuit is typically between 250 and 500 Hz, i.e. in the region of the 5th and 7th harmonics. Such a resonance although can lead to the following undesirable effects: – overloading of capacitors, – overloading of transformers and transmission equipment, – interference with metering and control systems, computers and electrical gear, – resonance elevation, i.e. amplification of harmonics, – voltage distortion. These resonance phenomena can be avoided by connecting capacitors in series with filter reactors in the PFC system. These so called “detuned” PFC systems are scaled in a way that the self-resonant frequency is below the lowest line harmonic. The detuned PFC system is purely inductive seen by harmonics above this frequency. For the base line frequency (50 or 60 Hz usually), the detuned system on the other hand acts purely capacitive, thus correcting the reactive power.

ABB is launching the industry’s first range of motor starting solutions with a Push-in Spring technology that makes fault-free wiring easier than ever. The innovative tool-free connection concept speeds up wiring work and provides a vibration-resistant connection that makes continuous operation more reliable.

SACE Emax 2 is a series of low voltage air circuit-breakers up to 6300 A. The SACE Emax 2 range is made up of 4 sizes: E1.2, E2.2, E4.2 and E6.2 up to 6300A. E1.2 offers 1,600A with breaking capacity up to 66kA and withstand current of 50kA. E1.2 offers 1,600A with breaking capacity up to 66kA and withstand current of 50kA. E4.2 is the new 4,000A circuit-breaker designed with a withstand rating of 100kA. E6.2, with an interrupting rating of 200kA and a structure that allows 6,300A to be reached.