[{"id": 52874, "created": "2015-05-06T20:43:46.845679", "project_id": 128, "task_id": 29262, "user_id": 877, "user_ip": null, "finish_time": "2015-05-06T20:43:46.845703", "timeout": null, "calibration": null, "external_uid": null, "media_url": null, "info": {"other": "", "translation": "\r\n[;] Let us transfer these facts to electricity.  The power here is a combination of effective voltage and electricity, the voltage flowing through a generator.  (Look at the essay in the previous edition of this magazine)  It is measure in voltage or watt. (The existing differences between turning voltage and alternate voltage, volt ampere and user have not been taken account of in this context.)  The necessary power for the user is determined by his tasks.  As these are very different and multilateral, industry has developed practically  all electrical appliances in different sizes and with different power output.  The difference in power output is only achieved by the size of \r\n                                                             5\r\nresistance.  Therefore the uptake in electricity is different too, as the voltage of the electricy net is everywhere the same; the consumer determines the power.\r\n\r\n[;] The connection between electrical power and labour can now easily be determined by considering the conditions described above.  Again the labour is the product of power and time.  One does not count in seconds though, but in hours and not in watt , but in kilowatt,  because the resulting unit , the kilowatt hour, is the most practical.  1 kilowatt hour is thus 3600 seconds x 1000 watt = 3 600 000 watt seconds.  In a few examples that means:  one bulb with a power - or, as is said as well - the value of 40 watt can be used for 25 hours; an electrical iron with 500 watt can be used for 2 hours in order to consume one kilowatt hour of energy.\r\n\r\nNow, in a household or workshop various electrical appliances are used simultaneously like motors, electric ovens, heaters etc.  The then available greatest amount of electricity is arrived at by the sum total of individual power consummation of various electric utensils in the household or workshop.  At all times the amount of the overall electricity available is equal to the sum of electricity used by individual utensils.  This electricy is as well a measure for the general power.\r\n\r\n[;] The overall amount of available energy is, as we read above, also dependant on the  duration of the individal implements used.  To determine these  the overall power output is registered in a special utensil, the meter, which contains a turning disc.  The frequency of the disc turnings depends on the amount of power used.  These turnings, standardized for kilowatt hours, are 'counted' automatically and provide a measure for the delivered and used power.\r\n\r\n[;] Finally let us have a quick  outlook on the planning of a power plant because it illustrates generally the above explained expressions of labour and electrical power.  The size of an energy plant is determined by the simultaneous required power of all potential customers. This number  determines how many and what kind of generators are needed.  A large power plant has for instance an installed power output of approximately 300000 kilowatt.   Such a power plant will be keen to attract such customers whose consummation of energy is more or less constant over longer periods of time, as this means their generators are most economically used. The rate of  the delivered energy in kilowatt referring to a whole year should, if possible, reach a yearly output of 8760 hours.  Apart from a few exceptions this is not  rarely achieved, not even approximately.    \r\n", "transcription": "na"}}]