BS EN IEC 62040-1:2019 pdf free.Uninterruptible power systems (UPS).
3.101 uninterruptible power system UPS combination of convertors, switches and energy storage devices (such as batteries), constituting a power system for maintaining continuity of load power in case of input power failure Note 1 to entry: Continuity of load power occurs when voltage and frequency are within rated steady-state and transient tolerance bands, and with distortion and interruptions within the limits specified for the output port. Input power failure occurs when voltage and frequency are outside rated steady-state and transient tolerance bands, or with distortion or interruptions outside the limits specified for the UPS. 3.102 skilled person person with relevant education and experience to enable him or her to perceive risks and to avoid hazards which the equipment can create Note 1 to entry: Such person has access to restricted access areas. [SOURCE: IEC 60050-195:1998，195-04-01, modified – The word “(electrically)” has been deleted from the term, and “electricity” has been replaced by “the equipment” in the definition.  The note has been added.]3.103  instructed person person adequately advised or supervised by s killed persons to enable him or her to perceive risks and to avoid hazards which the equipment can create Note 1 to entry: Such person has access to restricted access areas. Note 2 to entry: Examples of activities performed by an instructed person can be found in IEC 61140:2001, Clause 8. [SOURCE: IEC 60050-195:1998, 195-04-02， modified – The word “(electrically)” has been deleted from the term, and the notes have been added.]3.104 ordinary person person who is neither a skilled person nor an instructed person Note 1 to entry: Such person does not have access to a restricted access area and is not trained to identify hazards. Such person may otherwise have access to the equipment or may be in the vicinity of the equipment. An ordinary person will not intentionally create hazards nor have access to hazardous parts under normal and single fault conditions. [SOURCE: IEC 60050-195:1998, 195-04-03, modified一The note has been added.] 3.105 service access area area accessible by skilled persons by the use of a tool, where it is necessary for skilled.BS EN IEC 62040-1 pdf download.