Tell me something about the wisdom of the light pole - electrical engineering design China lighting network
Today about wisdom light pole electrical engineering design. Wisdom light pole is mounted on the light pole street lighting, LED information display, security camera, alarm for help system, traffic signal, wireless base stations, such as charging pile, the load each are not identical, nature and function in the engineering design should fully understand the needs of customers, reasonable system design. 1, load under normal circumstances, the wisdom of the light pole for level 3 load load level. Few things will improve the load level, such as the important section of the security system of load level can moderately increase, this need to be determined in consultation with the owner. Need 2, load calculation load calculation recommended coefficient method, the grouping of different types of load to load. The wisdom light pole without proper need coefficient, yet only reference for the similar load related information. There is no doubt that the wisdom of the light pole lighting load capacity; Charging pile is wisdom light pole, big load standard communication charging pile for 7 kw / 220 v AC
; And the LED information display parameters such as capacity depends on its size, brightness and resolution, and dynamic/static situation, general situation and street lamp LED display in the subordinate status, the screen will not very big, otherwise it will affect the driving safety. 3 lamps, high pressure system adopted preinstalled type transformer substation, high pressure using ring network cabinet, simple and economic. But pay attention to the high side grounding form, small resistance grounding, the arc suppression coil earthing grounding system and there is a big difference, the selection of equipment, cables have bigger influence. 4, low pressure low pressure systems use TT or TN - more S system. Because wisdom light pole installed in outdoor, so, the low voltage wire loop need to set up the residual current protection device. If there are conditions, intelligent streetlight electricity load power and low-voltage distribution cables can be Shared, it has a good economy. 5, note 1) Can be set up according to the need to set up by ShanQi general wisdom light pole in the city, streets are generally have a tall buildings or trees, in this case the wisdom light pole in the construction of lightning protection system within the scope of protection, can not meet ShanQi Settings. 2) TT system load side grounding to meet 'Ia. RA 3) Protection sensitivity calibration due to low voltage line is longer, need check protection sensitivity. According to the specification for design of low-voltage distribution GB - 50054 6, 2011. 2. Stipulated in article 4
when the short-circuit protection circuit breaker for electrical appliances, protected lines at the end of the short circuit current should not be less than the instantaneous or short time delay current circuit breaker tripping device setting current of 1. Three times. In a word, the wisdom light pole by the rapid development of the new things, is applied in some cities, some areas, need to seriously comb, analysis in engineering design level. YanZhiXiang
bean mandarin electric
the author li binghua,