I.S.HD 384.4.442 S1:1998
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ELECTRICAL INSTALLATIONS OF BUILDINGS - PART 4: PROTECTION FOR SAFETY - CHAPTER 44: PROTECTION AGAINST OVERVOLTAGES - SECTION 442: PROTECTION OF LOW-VOLTAGE INSTALLATIONS AGAINST FAULTS BETWEEN HIGH-VOLTAGE SYSTEMS AND EARTH
Hardcopy , PDF
01-25-2012
English
01-01-1998
Introduction
442.1 General
442.1.1 Scope and object
442.1.2 Power-frequency stress-voltage
442.1.3 Normative references
442.1.4 Symbols
442.2 Earthing arrangements in transformer sub-stations
442.3 Earthing arrangements with regard to type of earthing
systems in low-voltage system
442.3.1 TN-systems
442.3.2 TT-systems
442.3.3 IT-systems
442.4 Power-frequency stress-voltage in low-voltage equipment
of transformer sub-stations
442.4.1 TN- and TT-systems
442.4.2 IT-systems
442.5 Stress-voltage in case of loss of the neutral conductor
in a TN or TT system
442.6 Stress-voltage in case of accidental earthing of an IT
system
442.7 Stress-voltage in case of a short-circuit between a
line conductor and the neutral conductor
Annex A (informative) Clause 9 of prEN 50179 - Earthing systems
Annex B (informative) A-deviations
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