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适用范围：This part of IEC 62040 applies to uninterruptible power systems (UPS) with an electricalenergy storage device in the d.c. link. It is used with IEC 60950-1, which is referred to in thisstandard as "RD" (reference document).NOTE UPS applications generally make use of a chemical battery as the energy storage device. Alternativedevices may be suitable, and as such, where “battery” appears in the text of this standard, where applicable, thismay be understood as “energy storage device”.When a clause is referred to by the phrase "The definitions or the provisions of item/RDapply", this phrase is intended to mean that the definitions or provisions in that clause ofIEC 60950-1 apply, except any which are clearly inapplicable to uninterruptible powersystems. National requirements additional to those in IEC 60950-1 apply and are found asnotes under relevant clauses of the RD.The primary function of the UPS covered by this standard is to ensure continuity of analternating power source. The UPS may also serve to improve the quality of the power sourceby keeping it within specified characteristics.This standard is applicable to UPS which are movable, stationary, fixed or for building-in, foruse in low-voltage distribution systems and intended to be installed in any operatoraccessible area or in restricted access locations as applicable. It specifies requirements toensure safety for the operator and layman who may come into contact with the equipmentand, where specifically stated, for the service person.This standard is intended to ensure the safety of installed UPS, both as a single UPS unit oras a system of interconnected UPS units, subject to installing, operating and maintaining theUPS in the manner prescribed by the manufacturer.This standard does not cover UPS based on rotating machines.Electromagnetic compatibility (EMC) requirements and definitions are given in IEC 62040-2.