Sistemas de distribuição e protecção contra contactos indirectos e defeitos à terra

ABB

Sistemas de distribuição e protecção contra contactos indirectos e defeitos à terra

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

Deste documento

3 Technical Application Papers April 2008 1SDC007102G0202 Distribution systems and protection against indirect contact and earth fault Technical Application Papers Distribution systems and protection against indirect contact and earth fault 6.2.1 Miniature circuit-breakers System pro M Index 1 Introduction. ....................................... 2 2 Main definitions.............................. 3 3 Protection against earth fault 3.1 General aspects....................................... 5 4 Classification of electrical distribution systems 4.1 TT system................................................ 6 4.2 TN system................................................ 6 4.3 IT system................................................. 7 4.4 Conclusions............................................. 7 5 Protection against indirect contact 5.1 Effects of current on human body........... 8 5.2 Protection against indirect contact by automatic disconnection of the circuit........... 9 5.3 Protection against indirect contact in TN systems........................................ 17 5.5 Protection against indirect contact in IT systems.......................................... 20 6 ABB SACE solutions for protection against earth fault 6.1 6.2 6.2.2 Residual current releases for Tmax moulded-case circuit-breakers. ............. 28 6.2.3 Electronic releases PR ranges for moulded-case and air circuit-breakers with . integrated residual current protection..... 29 6.2.4 Residual current relay...