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Instalação de contactores ESB e EN
ABB

Instalação de contactores ESB e EN

Os contactores são dispositivos que funcionam de forma electromagnética. Veja neste documento técnico qual o seu princípio de funcionamento e o que deve garantir na sua instalação.

ABB

Instalação de contactores ESB e EN

Publicado: 28 de janeiro de 2016 · Categoria: Cadernos técnicos

Os contactores são dispositivos que funcionam de forma electromagnética. Veja neste documento técnico qual o seu princípio de funcionamento e o que deve garantir na sua instalação.

Deste documento

ESB and EN installation contactors Application handbook 2 2CDC103022M0201 Content 1 Basic function of installation contactors 4 2 Modular DIN rail components 5 3 ESB/EN Installation contactors 6 4 Technical requirements 9 5 Utilization categories 12 5.1 AC-1 15 5.2 AC-3 16 5.3 AC-5a 17 5.4 AC-5b 18 5.5 AC-7a/AC-7b 18 5.6 Summary of the utilization categories 20 6 Applications 21 6.1 Motors 21 6.2 Lighting 22 6.3 Mixed Loads 24 6.4 Heating 25 6.5 E-mobility 26 6.6 Solar power systems 27 2CDC103022M0201 3 1 Basic function of installation contactors Contactors are electromagnetically operated switches. The functional principle can be described as follows: when control power flows through the magnet coil of a contactor, the resulting magnetic field attracts the mechanical contact carrier. By interruption of the coil control circuit the mechanical contact carrier returns to the starting position. Installation contactors belong to the class of air-break contactors. If coil power is removed, an arc is created as the contacts open. Air-break contactors extinguish the arc by separating the contacts by a sufficient distance. Air-break contactors are more economic, because the price and the maintenance costs are lower than with other classes of contactors (e.g. oil immersed, vacuum). Figure 1 shows the basic construction of a contactor. This contactor consists of a normally closed and normally open contact. Current is drawn into the coil when an energy supply is connected to coil...

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