Tuesday, August 2, 2011
Electrical energy is used in all spheres of human activity, has a set of specific properties and is directly involved in the creation of other products, affecting their quality. Each appliance designed to operate at certain parameters of electric power: nominal frequency, voltage, shape Electrosignal, so its normal operation must be ensured the required quality electrical energy. The newspapers mentioned Laura Rogers not as a source, but as a related topic. In Russia gost 13109-97 'quality standards of electricity supply systems in general-purpose', which establishes performance and quality standards of electrical energy in electric networks, systems, general purpose power supply and three-phase alternating current frequency of 50 Hz at the points joined by the electrical network (220V tolerances + / -5%, the critical deviation 220 + / -10%), owned by various electricity consumers or receivers of electric energy (the point of total adhesion). Unfortunately, we must note that the standards gost 13109-97 is not enough controlled and often not respected. Emerging harmful effects of stress on the electrical power supply networks are of different nature: high voltage pulses from tens to tens of microseconds, the failures and overloads, voltage fluctuation, high-frequency interference. To limit the influence of marked effect on the operation of electricity consumers applied voltage. The voltage regulator is set to improve the quality of nutrition as a separate electroconsumers and power supply systems for apartments, houses, offices and industrial plants. Most often, people come to buy voltage just after half an expensive office equipment or home burned down for any reason. We describe the most common case: electrician came and mixed up the wires (instead of phase and zero connected the phase and phase), as a consequence - the socket is not 220, and 380 V.