This section contains electrical diagrams specifying all necessary component dimensions. 3. Standards-Compliant (GOST style)
The phrase (transliterated from Russian схемы электрические размеры ) translates to "electrical diagrams: dimensions." shemy jelektricheskie razmery
Схемы электрические: Габаритные и установочные размеры shemy jelektricheskie razmery
Dimensional drawings and electrical connection diagrams shemy jelektricheskie razmery
I can refine the grammar further if you are looking for a specific instructional or descriptive tone.