IEC 62505-1:2009 is applicable to single-phase a.c. one-pole circuit-breakers designed for indoor or outdoor fixed installations for operation at frequencies of 16,7 Hz, 50 Hz and 60 Hz on traction systems having an UNm above 1 kV up to 52 kV.
IEC 62505-1 Ed. 1.0 b:2009 History
IEC 62505-1 Ed. 2.0 b:2016
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IEC 62505-1 Ed. 1.0 b:2009
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