Now it is impossible to sale electrical and electronic equipment in Europe without certificate of compliance with EMC standards. There is EMC certification in Russia too. Competent body can give certificate on the base of test report. All equipment must be tested in accredited laboratory. Emission tests are intendent to measure of electromagnetic noise generated by equipment.
Many standards are under consideration.
Russian standards will be harmonized with EMC European Norms. A voltage dip may be caused by switching operations and by faults. GOST 29280-91 Low frequency harmonics in supply networks. Harmonics are generated in electrical networks by thyristor rectifiers and other power equipment. This disturbance is generated by discharge of static electricity.