Russian standards PDF
Rotating electrical machines. Part 18-22. Functional evaluation of insulation systems. Test procedures for wire-wound windings. Classification of changes and insulation component substitutions
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International electrotechnical vocabulary. Part 321. Instrument transforms
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Polyvinylchloride insulated cables of rated voltages up to and including 450/750V. Part 2. Test methods
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Rubber insulated cables for rated voltages up to and including 450/750 V. Part 4. Cords and flexible cables
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Electrical relays. Part 16. Impedance measuring relays
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