Generalidades e oferta ABB para a coordenação de dispositivos de protecção

ABB

Generalidades e oferta ABB para a coordenação de dispositivos de protecção

Publicado: 13 de setembro de 2013 · Categoria: Cadernos técnicos

Deste documento

Three-phase asynchronous motors 1SDC007106G0201 Generalities and ABB proposals for the coordination of protective devices Technical Application Papers Three-phase asynchronous motors Generalities and ABB proposals for the coordination of protective devices Index Introduction................................................ 2 1 Three-phase asynchronous motor 1.1 Typologies and use.................................. 3 1.2 Structure of the asynchronous motor...... 4 2 Protection and switching of the asynchronous motor 2.1 Main Standard definitions of general character.................................................. 6 2.2 Main Standard prescriptions regarding coordination ............................................ 8 2.2.1 Normal and heavy starting....................................... 8 2.2.2 Co-ordination type 1 and type 2.............................. 9 3 Main starting modalities of a three-phase asynchronous motor with squirrelcage rotor 3.1 Direct-on-line starting............................ 10 3.2 Reduced voltage starting....................... 10 3.2.1 Star/delta (Y/) starting ........................................ 10 3.2.2 Autotransformer starting....................................... 12 3.2.3 Starting with stator resistors or reactors............... 12 3.2.4 Soft starting........................................................... 13 4 ABB equipment and solutions for co-ordination 4.1 Theoretical considerations about co-ordination equipment..........................