Technical paper nº 3 | Distribution systems and protection against indirect contact and earth fault (EN)

ABB

Technical paper nº 3 | Distribution systems and protection against indirect contact and earth fault (EN)

Publicado: 3 de fevereiro de 2015 · Categoria: Cadernos técnicos

Deste documento

Technical Application Papers No.3 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 and System pro M compact with residual current protection..................... 23 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 with external 6.3 6.4 transformer............................................ 30 The solution with function G................... 31 Protection function G or residual current . protection?............................................ 33 6.4.1 Typical...