
ELECTRICAL INSTALLATIONS OF BUILDINGS - PART 4: PROTECTION FOR SAFETY - CHAPTER 45: PROTECTION AGAINST UNDERVOLTAGE
出版:European Committee for Standards - Electrical

專家解讀視頻
Defines 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.