UNE-EN 88528-11:2004 Reciprocating internal combustion engine driven alternating current generating sets -- Part 11: Rotary uninterruptible power systems - Performance requirements and test methods (Endorsed by AENOR in October of 2004.)
2004UNE-EN 88528-11:2004 Reciprocating internal combustion engine driven alternating current generating sets -- Part 11: Rotary uninterruptible power systems - Performance requirements and test methods (Endorsed by AENOR in October of 2004.)