Madalpingelised aparaadikoosted. Osa 1, Üldreeglid = Low-voltage switchgear and controlgear assemblies. Part 1, General rules (IEC 61439-1:2011)2012 https://www.ester.ee/record=b2860114*est

Madalpingelised aparaadikoosted. Osa 2, Jõuaparaadikoosted = Low-voltage switchgear and controlgear assemblies. Part 2, Power switchgear and controlgear assemblies (IEC 61439-2:2011)2012 https://www.ester.ee/record=b2860121*est