IEC 60364-4-44:2001

Gives rules to ensure the safety of persons and equipment in a LV system if a fault occurs between the HV system and earth in the HV part of transformer stations which supply low-voltage systems.

Identifies and describes the locations in electrical installations where transient overvoltages may appear; describes the means by which such overvoltages may be limited to values not exceeding the withstand impulse voltages of the equipment supplied.

Provides information for architects of buildings and for designers and installers of electrical installations of buildings on some installation concepts which can limit electromagnetic interference (EMI). Basic considerations are give here to mitigate these disturbances.

Concerns the precautions to be taken where a drop in voltage, or a loss and subsequent restoration of voltage could imply dangerous situations for persons or property or where a part of the installation or current-using equipment may be damaged by a drop in voltage.

The rules of this Part of IEC 60364 are intended to provide requirements for the safety of electrical installations in the event of voltage disturbances and electromagnetic disturbances generated for different specified reasons. This second edition of IEC 60364-4-44 cancels and replaces the first edition published in 2001, amendment 1 (2003) and amendment 2 (2006). The contents of the corrigenda of May 2010 and October 2011 have been included in this copy.