Uninterruptible power systems (UPS) - Part 1 : Safety requirements
1 Scope
This document applies to movable, stationary, fixed or built-in UPS for use in low-voltage distribution systems and that are intended to be installed in an area accessible by an ordinary person or in a restricted access area as applicable, that deliver fixed frequency AC output voltage with port voltages not exceeding 1000 V AC or 1500 V DC and that include an energy storage device. It applies to pluggable and to permanently connected UPS, whether consisting of a system of interconnected units or of independent units, subject to installing, operating and maintaining the UPS in the manner prescribed by the manufacturer.
Note 1: Typical UPS configurations, including voltage and/or frequency converters and other topologies, are described in IEC 62040-3.
Note 2: UPS generally connect to their energy storage device through a DC link. A chemical battery is used throughout the standard as an example of an energy storage device. Alternative devices exist, and as such, where "battery" appears in the text of this document, this is to be understood as "energy storage device".
This document specifies requirements to ensure safety for the ordinary person who comes into contact with the UPS and, where specifically stated, for the skilled person. The objective is to reduce risks of fire, electric shock, thermal, energy and mechanical hazards during use and operation and, where specifically stated, during service and maintenance.
This document is harmonized with the applicable parts of group safety publication IEC 62477-1:2012 for power electronic converter systems and contains additional requirements relevant to UPS.
This document does not cover:
UPS that have a DC output;
systems for operation on moving platforms including, but not limited to, aircrafts, ships and motor vehicles;
external AC or DC input and output distribution boards covered by their specific product standard;
stand-alone static transfer systems (STS) covered by IEC 62310-1;
systems wherein the output voltage is directly derived from a rotating machine;
telecommunications apparatus other than UPS for such apparatus;
functional safety aspects covered by IEC 61508 (all parts).
Note 3: Even if this document does not cover the applications listed above, it is commonly taken as a guide for such applications.
Note 4: Specialized UPS applications are generally governed by additional requirements covered elsewhere, for example UPS for medical applications.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
Clause 2 of IEC 62477-1:2012 applies, except as follows:
Add the following normative references:
GB/T 7260.2-2009 Uninterruptible power systems (UPS) - Part 2 : Electromagnetic compatibility (EMC) requirements (IEC 62040-2:2005, IDT)
GB/T 14536.1- 2022 Automatic electrical controls - Part 1 : General requirements (IEC 60730-1:2013, IDT)
IEC 60364-4-42 Low-voltage electrical installations - Part 4-42: Protection for safety - Protection against thermal effects
Note: GB/T 16895.2-2017 Low-voltage electrical installations - Part 4-42 : Protection for safety - Protection against thermal effects (IEC 60364-4-42:2010, IDT)
IEC 60384-14 Fixed capacitors for use in electronic equipment - Part 14: Sectional specification - Fixed capacitors for electromagnetic interference suppression and connection to the supply mains
Note: GB/T 6346.14-2015 Fixed capacitors for use in electronic equipment - Part 14 : Sectional specification - Fixed capacitors for electromagnetic interference suppression and connection to the supply mains (IEC 60384-14 : 2005, IDT)
IEC 60529 Degrees of protection provided by enclosures (IP Code)
IEC 60695-11-20 Fire hazard testing- Part 11-20: Test flames- 500 W flame test method
IEC 60755 General requirements for residual current operated protective devices
Note: GB/T 6829-2017 General requirements for residual current operated protective devices (IEC TR 60755:2008, MOD)
IEC 60947-2 Low-voltage switchgear and controlgear - Part 2 : Circuit- breakers
Note: GB/T 14048.2-2020 Low-voltage switchgear and controlgear - Part 2 : Circuit-breakers (IEC 60947-2:2019,IDT)
IEC 60950-1 : 2005 Information technology equipment - Safety- Part 1 :General requirements
Note: GB 4943.1-2011 Information technology equipment - Safety - Part 1 : General requirements (IEC 60950-1:2005, MOD)
IEC 61008-1 Residual current operated circuit - breakers without integral overcurrent protection for household and similar uses (RCCBs) - Part 1 : General rules
Note: GB/T16916.1-2014 Residual current operated circuit-breakers without integral overcurrent protection for household and similar uses (RCCB) - Part 1 : General rules (IEC 61008-1 : 2012, MOD) .
IEC 61009-1 Residual current operated circuit-breakers with integral overcurrent protection for household and similar uses (RCBOs) - Part 1 : General rules
Note: GB/T 16917.1-2014 Residual current operated circuit-breakers with integral overcurrent protection for household and similar uses (RCBOs) - Part 1 : General rules (IEC 61009-1 :2012, MOD)
IEC 62477-1:2012 Safety requirements for power electronic converter systems and equipment - Part 1 : General
3 Terms and definitions
Clause 3 of IEC 62477-1:2012 applies, except as follows:
Table 1 in Clause 3 of IEC 62477-1:2012 is replaced with the following table, with the following new terms and definitions, and new notes.
