Russian standards PDF

Explosive atmospheres. Part 30-1. Electrical resistance trace heating. General and testing requirements

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Power capacitors for induction heating installations. Part 1. General

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Miniature fuses. Part 1. Definitions for miniature fuses and general requirements for miniature fuse-links

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Miniature fuses. Part 4. Universal modular fuse-links for through-hole and surface mount types

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Electrical relays. Part 12. Directional relays and power relays with two input energizing quantities

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Measuring relays and protection equipment. Part 127. Functional requirements for over/under voltage protection

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