Rotating electrical machines. Classification of degrees of protection provided by enclosures for rotating machines 
             
            
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              Electrical products. Terms and definitions of basic concepts 
             
            
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              Power generating sets and mobile electric power stations with internal combustion engines. Terms and definitions 
             
            
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              Excitation systems for turbo generators, hydro generators and synchronous condensers 
             
            
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              Resistance welding machines. Terms and definitions 
             
            
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              Generating sets and moving power stations with internal-combustion engines. System of symbols 
             
            
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              Electric small machines. Conditional designation 
             
            
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              Rotating electrical machines. Symbols for types of construction and mounting arrangements. 
             
            
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              Electrical rotary machines. Conventions for description of synchronous machines 
             
            
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              Electrical rotating machinery. Terms and definitions 
             
            
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              Product-quality index system. Electrical rotating frames, number above 56 to 355 including. Nomenclature of indices 
             
            
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              Product-quality index system. Turbo-generators, whater-wheel generators, synchronous condensers and their excitation systems. Nomenclature of indices 
             
            
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