The series ballast for cable fault street lamp electric fujian led street lamp manufacturer

According to the conditions of solar street light line operation and years of work experience, summed up the following situations: 1, external force damage. From the point of the fault analysis of buried cable, at present a lot of street lamp cable fault is caused by mechanical damage. Example



according to the conditions of solar street light line operation and years of work experience, summed up the following situations: 1, external force damage. From the point of the fault analysis of buried cable, at present quite a lot of street lamp cable fault' In the domestic accelerated the process of socialist modern construction, the rising electricity demand of the city. 】 Are caused by mechanical damage. For example: due to the cable laying installation construction non-standard mechanical damage [ After receiving the mechanical violent action, when the body organ organization structure was damaged or function obstacle. 】 ; The buried cable' Buried cable direct burial cable is in accordance with the requirements of the specification, after digging the directly buried in cable trench, spread sand cushion in the ditch, ditch and remove impurities, and laying cable, cable laying is completed, will immediately to fill sand, but also in the cable is covered with a layer of brick or concrete slab to protect the cable, and then a way of cable laying, backfilling. 。 。 】 On the civil construction and make the operation of cable by external damage, etc. If the injury is not serious, months or even years can lead to injury completely breakdown form fault, fault can happen when the severely damaged. 2, insulation be affected with damp be affected with damp. It is also very common, usually occur in the directly buried or in the exhaust pipe of cable joint 【 Cable joint is also called the cable head. 】 Place. For example: in the humid climate conditions make cable joint and joint production does not conform to the requirements, can make the joint water seepage or into water vapor, under the effect of electric field for a long time of the cable by oxidation erosion by water 'branches', gradually damage the insulation of the cable strength and cause failure. 3, chemical corrosion. Cable directly buried in the acid and alkaline larger formation, often can cause cable armoring, lead or outer sheath corrosion, protective layer due to the long suffering chemical corrosion and electrochemical corrosion, the coating failure, the insulation is reduced, can also lead to cable fault. 4, long-term overload operation. Due to the cable overload operation for a long time, the heating effect of the electric current is bigger, load current 【 When load current is refers to the motor load actual detect stator current value, this value changes with the size of the load. 】 Through cable inevitably lead to conductor heating, electric charge at the same time the skin effect of the Skin effect is also called the skin effect. 】 And armor of the eddy current loss, dielectric loss also can produce additional heat, making the cable temperature. Overload for a long time running, the high temperature will accelerate aging of the insulation, and insulation breakdown. Especially in hot summer, the temperature of the cable often resulted in the breakdown of cable insulation is weak at first, so in the summer, the failure of the cable is much more special. 5, cable joint failure. Cable joint is the weakest link in the cable line, fault directly by the people, Construction of bad) The cable joint failure often occurs. Construction personnel in the process of making cable joint, if there is a connection is not tight, heating or inadequate pressure to reason, will result in cable insulation to reduce, causing accident. 6, the environment and temperature. Cable of the external environment and heat can cause cable high temperature, insulation breakdown, even burst into flames.