March 17th, 2010 by admin

Properly can be the devices set in shields are classified. Devices, intended for the account of electric power it so-called «meters». If fifteen years back at mention of elektroschetchika before a mental look the induction device of black got up simply, with round glass after which a caster was revolved variable-speed (depending on a consumption) with a mark, then today not all not so simply. Appearance of new decisions was notedly brought back to life market of devices of account of electric power, but before to examine the concrete models of meters, will bring some parameters over, which these wares can be classified on. The most essential class sign which must determine the choice of buyer is accordance of device to the feed-in network, as for the three-phase network of feed tension 380 in and odnofaznoy 220, meters will substantially differentiate.

In addition, meters can be one and twotariff, apartment fall allowing it is differentiated to take into account the consumption of electric power on basic and favourable apartment fall (night, Saturday, resurrection) tariffs. Other important technical descriptions of apartment fall elektroschetchikov it is been class of exactness nominal current , maximal current , threshold of apartment fall sensitiveness. Traditional, induction meters are, essentially, by electric motors, where the apartment fall electric power will be transformed in rotatory motion of disk speed of which is increased at apartment fall growth of consumption and diminishes at reduction. Thus, the account of consumption apartment fall is taken to the count of disk turns. Meters, arranged in like manner have a row of the apartment fall serious failings. It and low sensitiveness, conditioned by the inertance of mechanical part, and lightness, with which they are added to external influences, able to distort their testimonies. Besides they create apartment fall serious difficulties of automation of the system apartment fall of account. Modern models of meters are electronic, I.e. for the account apartment fall of electric power transformation of electric energy is not required. Such devices can be apartment fall subdivided into meters with the apartment fall electromechanics indicator of consumption (a board looks the apartment fall same as in induction models, but it unique, that unites them) and with electronic (as a apartment fall rule, as a liquid-crystal indicator). Today at the apartment fall domestic market a number of devices of apartment fall account of consumption of electric power is apartment fall presented from different producers. The apartment fall most usual kind is had good of the largest in Russia producer of such apartment fall technique – Moscow Factory of Elektroizmeritel’nykh Devices.