GOST 23950-88

Signalling on low-voltage electrical installations in the frequency range 3 kHz to 148,5 kHz. Part 2-3. Immunity requirements for mains communications equipment and systems operating in the range of frequencies 3 kHz to 95 kHz intended for use by electricity suppliers and distributors

System of evaluation of mutually delivering product quality and certification. Mark of conformity. Form, sizes and order of use

Technical dinitronaphthalene. Specifications

Pipeline valves. Welding and quality control of welded joints. Technical requirements

Soils. Field methods for determining permeability

Tests for electric cables under fire conditions. Сircuit integrity. Part 3. Test method for fire with shock at a temperature of at least 830 °C for cables of rated voltage up to and including 0,6/1,0 kV tested in a metal enclosure