標準號：IEC 60364-4-43-2008
中文標準名稱：低壓電氣裝置.第4-43部分:安全防護.過電流保護
英文標準名稱：Low-voltage electrical installations - Part 4-43: Protection for safety - Protection against overcurrent
標準類型：P91
發布日期：1999/12/31 12:00:00
實施日期：1999/12/31 12:00:00
中國標準分類號：P91
國際標準分類號：29.120.50;91.140.50
引用標準：IEC 60269-2;IEC 60269-3;IEC 60269-4;IEC 60364-4-41;IEC 60364-5-52-2001;IEC 60439-2;IEC 60724;IEC 60898;IEC 60947-2;IEC 60947-3;IEC 60947-6-2;IEC 61009;IEC 61534;IEC Guide 104
適用范圍：This part of IEC 60364 provides requirements for the protection of live conductors from theeffects of overcurrents.This standard describes how live conductors are protected by one or more devices for theautomatic disconnection of the supply in the event of overload (Clause 433) and short-circuit(Clause 434) except in cases where the overcurrent is limited in accordance with Clause 436or where the conditions described in 433.3 (omission of devices for protection againstoverload) or 434.3 (omission of devices for protection against short-circuit) are met.Coordination of overload protection and short-circuit protection is also covered (Clause 435).NOTE 1 Live conductors protected against overload in accordance with Clause 433 are considered to beprotected also against faults likely to cause overcurrents of a magnitude similar to overload currents.NOTE 2 The requirements of this standard do not take account of external influences,NOTE 3 Protection of conductors according to this standard does not necessarily protect the equipmentconnected to the conductors.NOTE 4 Flexible cables connecting equipment by plugs and socket-outlet to fixed installations are not part of thescope of this standard and for this reason are not necessarily protected against overcurrent.NOTE 5 Disconnection does not mean isolation in this standard.