The high-voltage apparatuses

341100 Power transformers (one-phase with power more than 4 Kw, three-phase with the power more than 6.3 Kw)
341200 Transformation stations complexes
341310 General purpose transformers of small power rates
341400 Electrical high voltage apparatus
349300 Isolators electro ceramic and glass ones
349400 Insulators or isolating materials from other means (except for ceramics and glass)
358700 Optical cables
359900 Cable armature