Network Communications News (NCN) October 2017 - Page 36

Total.book Page 268 Saturday, September 7, 2013 5:22 PM Total.book Page 267 Saturday, September 7, 2013 5:22 PM UPS Applicable Standards - Standards Relevant to UPS Installations Standards Relevant to Lead Acid Batteries Standards Relevant to UPS Installations Standard CE Applicable Standards - Standards Relevant to Lead Acid Batteries Details Standard Marking in compliance with the following European directives: • Low Voltage Directive 2006/95/EC • EMC Directive 2004/108/EC Details BS 6133:1995 Code of practice for safe operation of lead- acid stationary batteries BS 6290-4: 1997 Lead-acid stationary cells and batteries. Specification for classifying valve regulated types ISO/IEC 27001:2005 Information Security Standards BS 25999-1:2006 Business continuity management. Part 1: Code of practice BS EN 60896-1:1992, IEC BS 7698-1:1993, ISO 8528-1:1993 Reciprocating internal combustion engine driven alternating current generating sets. Specification for application, ratings and performance Stationary lead-acid batteries. General requirements and methods of test. Vented type BS EN 60896-2:1996, IEC ER G59/1 Recommendations for the connection of embedded generating plant to the Public Electricity Suppliers distribution systems. Energy Networks Association Stationary lead-acid batteries. General requirements and methods of test. Valve regulated type BS EN 50272-2:2001 Safety requirements for secondary batteries and battery installations. Stationary batteries BS EN 60529:1992 Specification for degrees of protection provided by enclosures (IP code) BS EN 60439-4:2004: Low-voltage switchgear and control gear assemblies ANSI/IEEE 450-2002 IEEE recommended practice for maintenance, testing and replacement of vented lead-acid batteries for stationary applications BS 7671:2001 Requirements for electrical installations. IEE Wiring Regulations. Sixteenth edition ANSI/IEEE 1184-1994 IEEE recommended guide for selection and sizing batteries for Uninterruptible Power Supplies (UPS) BS EN 50310:2006 Application of equipotential bonding and earthing in buildings with information technology equipment Low-voltage switchgear and control gear assemblies ANSI/IEEE 1188-1996: BS EN 60439-4:2004 IEEE recommended practice for maintenance, testing and replacement of valve-regulated lead-acid (VRLA) batteries for stationary applications Here, VFD means that the UPS output is dependent on mains voltage and frequency, while VI describes a UPS output dependent on mains frequency variations, while mains Voltage variations are The UPS Handbook regulated (Independent). VFI refers to a UPS output Independent of mai ns Volta ge a n d Frequ e nc y var i at i ons . Fig.1 (previou s p a ge) shows maximum a l l owa b l e response times for the t h re e d i f fe re nt cla s s es to var io u s mai ns p ro blems . UPS output waveform is the second step of the EN 62040- 3 classification. This is rated as either sinusoidal or non-sinusoidal, according to its harmonic content, and the linearity or otherwise of the reference load conditions. It allows for separate assessment of this waveform on battery and on mains operation. EN 62040-3’s third and final step concerns the UPS outp ut’s dynamic performance. It provides a set of graphs showing transient overvoltage and undervoltage limits against transient duration time for different circumstances:  hange of operation mode C performance  S tep linear load performance in mains/battery mode 36 | October 2017 Figure 2 (left) Figure 3 (right)  tep reference non-linear S load per formance in mains/ battery mode These graphs and other detailed information about EN 267 are shown in the UPS 62040-3 268 Handbook, revised fourth edition. This shows the highest possible UPS classification as VFI-SS-111, which can only be achieved by modern, true on-line, double conversion UPS topologies. Energy Networks Association ER G5/4-1 T h i s re co mme n d at i o n state s t h at sat i sfa cto r y o p e rat i o n of t h e e l e ct r i c i t y su p p l y sy ste m a n d u se r ’ s e q u i p m e nt i s o n l y o bta i n e d w h e re e l e ct ro ma g n et i c co mp at i b i l i t y ( EM C ) b et we e n t h e m exi st s. B y l i m i t i n g t h e h a r m o n i c e mi ssi o n s of c u sto me r s’ n o n - l i n e a r l o a d s a n d ge n e rat i n g p l a nt , E R G 5 /4- 1 h e l p s to f u l f i l t h e te c h n i c a l o b j e ct i ve of t h e UK EM C Re g u l at i o n s. While harmonic distortion limits are not governed by statute, electrical design consultants and manufacturers must ensure equipment emissions when connected to the supply system do not exceed the planning levels set by G5/4-1 and that such harmonic distortions are acceptable to the Network Operating Company (NOC). Standards applicable to UPS installations and The lead-acid UPS Handbook batteries Fig. 2 lists standards relevant to UPS installations, while Fig. 3 covers standards relevant to lead- acid batteries. Conclusion This ar ticle has introduced readers to the legislative landscape per taining to UPSs, their batteries and installation. More information is available from the UPS Handbook Four th Edition (revised), obtainable from Uninterruptible Power Supplies Ltd Ltd’s website. However, to ensure that your UPS system is fully compliant with all relevant standards – without unnecessary or inappropriate investment – it’s best to consult with a reputable UPS supplier who can review your situation and advise on a suitable strategy. More information: Uninterruptible Power Supplies Ltd upspower.co.uk