Tham khảo tài liệu 'connection to the lv utility distribution network', kỹ thuật - công nghệ, điện - điện tử phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Chapter C Connection to the LV utility distribution network Contents 1 Low-voltage utility distribution networks Low-voltage consumers C2 C2 Low-voltage distribution networks C10 The consumer service connection cii Quality of supply voltage C15 2 Tariffs and metering C16 C1 Schneider Electric - all rights reserved Schneider Electric - Electrical installation guide 2010 1 04 12 2009 C2 Schneider Electric - all rights reserved C - Connection to the LV public distribution network 1 Low-voltage utility distribution networks The most-common LV supplies are within the range 120 V single phase to 240 415 V 3- phase 4-wires. Loads up to 250 kVA can be supplied at LV but power-supply organizations generally propose a MV service at load levels for which their LV networks are marginally adequate. An international voltage standard for 3-phase 4- wire LV systems is recommended by the IEC 60038 to be 230 400 V Low-voltage consumers In Europe the transition period on the voltage tolerance to 230V 400V 10 - 10 has been extended for another 5 years up to the year 2008. Low-voltage consumers are by definition those consumers whose loads can be satisfactorily supplied from the low-voltage system in their locality. The voltage of the local LV network may be 120 208 V or 240 415 V . the lower or upper extremes of the most common 3-phase levels in general use or at some intermediate level as shown in Figure C1. An international voltage standard for 3-phase 4-wire LV systems is recommended by the IEC 60038 to be 230 400 V. Loads up to 250 kVA can be supplied at LV but power-supply organizations generally propose a MV service at load levels for which their LV networks are marginally adequate. Country Frequency tolerance Hz Domestic V Commercial V Industrial V Afghanistan 50 220 k 380 220 a 380 220 a 380 220 a Algeria 50 220 127 e 220 k 380 220 a 220 127 a 10 000 5 500 6 600 380 220 a Angola 50 380 220 a 220 k 380 220 a 380 220 a Antigua and .
