Russian standards
Switching surges from protective systems. Switching surges protection devices of coal mines underground electrical networks. Specifications and test methods
Document status: Active
Fire hazard testing. Part 10-2. Abnormal heat. Ball pressure test
Document status: Active
Explosive atmospheres. Electrical resistance trace heating. Part 30-1. General and testing requirements
Document status: Cancelled
Explosive atmospheres. Part 5. Equipment protection by powder filling 'q'
Document status: Active