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General-purpose oil-immersed power transformers of 110 and 220 kV and autotransformers 27,5 kV for electric a. c. railway. General specifications

Document status: Replaced by GOST R 51559-2022

Flexible PVC for insulation and protective jackets of wires and cables. Specifications

Document status: Active

Electrical relays. Part 16. Impedance measuring relays

Document status: Active

Enamelled round wires. Method of test for springiness

Document status: Active

PE insulated rubber sheathed control cables. Specifications

Document status: Active

Explosive atmospheres. Part 33. Equipment protection by special protection 's'

Document status: Cancelled