ČSN 332000-4-442-ed.2 (332000)

Low voltage electrical instalations - Part 4-442: Protection for safety - Protection of low-voltage installations against temporary overvoltages due to earth faults in the high-voltage system and due to faults in the low voltage system



STANDARD published on 1.12.2012


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The information about the standard:

Designation standards: ČSN 332000-4-442-ed.2
Classification mark: 332000
Catalog number: 91714
Publication date standards: 1.12.2012
SKU: NS-123180
The number of pages: 16
Approximate weight : 48 g (0.11 lbs)
Country: Czech technical standard
Category: Technical standards ČSN

Annotation of standard text ČSN 332000-4-442-ed.2 (332000):

Pravidla v této normě stanovují požadavky na bezpečnost instalací nn v případě:

  • - poruchy mezi soustavou vn a zemí v transformovně, která napájí instalaci nn;
  • - přerušení vodiče N v síti nn;
  • - zkratu mezi fázovým vodičem a nulovým vodičem;
  • - náhodného uzemnění fázového vodiče v IT soustavě nízkého napětí;

Požadavky na uspořádání uzemnění v transformovně jsou uvedeny v IEC 61936-1

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