Network Communications News (NCN) October 2017 - Page 34

UPS Maintaining standards Alan Luscombe, director at Uninterruptible Power Supplies Ltd., a Kohler company, explores the wide range of standards applicable to UPS systems, installations and batteries. T he ques tio n of s ta n da rds re l at ing to UP Ss is co m p l ex , beca us e ma ny a s pects a re i nvolved. There a re s afet y , E M C compli a n ce a nd per form a nc e consi d eration s for the U PS equ i pment its el f, a nd l im itat io ns for t he equipment’ s imp a ct o n t he power network. Taking a typical case, if lead-acid batteries are being used, then these have 34 | October 2017 their own regulations relating to selecting, safe operation, testing, maintenance and replacement. Further aspects of the UPS installation are also subject to regulation; these include environmental protection (IP) standards, wiring regulations, equipotential bonding and earthing, and other factors. B e l ow, we rev i ew t h e m o s t i m p o r ta nt o f t h e s e s ta n d a rd s . P r i m a r i l y , U P S s m u s t c o m p l y w i t h Low Vo l ta ge ( LV ) e l e ct ro m a g n et i c c o m p at i b i l i t y ( E M C ) d i re ct i ve s a s we l l a s ot h e r re g u l at i o n s . T h i s c o m p l i a n c e i s t y p i c a l l y a c h i eve d t h ro u g h U P S S ta n d a rd E N 6 2 0 4 0 , w h i c h c o m p r i s e s t h re e p a r t s : E N62040 – Part 1 (General and Safety Requirements) E N62040 – Part 2 (EMC – Electromagnetic Compatibility) E N62040 – Part 3 (Performance)