SR HD 60364-4-43:2011

Low-voltage electrical installations -- Part 4-43: Protection for safety - Protection against overcurrent

IEC 60364-4-43:2008 provides requirements for the protection of live conductors from the effects of overcurrents. IEC 60364-4-43:2008 describes how live conductors are protected by one or more devices for the automatic 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 436 or where the conditions described in 433.3 (omission of devices for protection against overload) 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). This third edition cancels and replaces the second edition, published in 2001, and constitutes a technical revision. The main changes with respect to the previous edition are: - Introduction of new informative Annexes B, C and D. - Information concerning flexible cables added to Scope. - Requirements added for overload detection for the neutral conductor for harmonic currents. - Requirement that devices for protection ag

Status : Valid
Approval date : 2/28/2011
Withdrawal date : 8/23/2026
Number of pages : 34
ICS : 29.120.50 Fuses and other overcurrent protection device,91.140.50 Electricity supply systems
Technical Committee : 136 - Electrical installation in buildings

Relations with other standards: