The selecting type of the Cable Assembly, with constructing（chapter 2）
Cable Assembly and road cross in places because Cable Assembly one is counted centralizedly to qualify for the next round of competitions in the transformer substation 10kV, adopt the Cable Assembly tunnel, support to lay. To along urban primary and secondary arterial highway side and street Cable Assembly that lane lay, our city carry on one's shoulder or back urban area adopt open drain Cable Assembly trough way of laying of one, a type of trough is divided into several types such as Line 2, Line 4, Line 6, large Cable Assembly ditch. More than 90% of the Cable Assemblys circuits in the sophisticated city adopt this way to lay. Cross in places to urban roads, will be laid the construction traffic and limit by the circuit in the future, safe in operation from the Cable Assembly, need to bear the weight of the heavily loaded respect of motor vehicle to consider, adopt and bury and arrange in charge of burying the way directlying in advance.
Plan science in 3 network structure, the ring network apparatus selecting type is reliable
Should satisfy " N - 1 " to press the wire harness distribution network in the city The requirement, make sure in the network wiring form of the ring. On condition that have the condition, " support one more fully " of the different transformer substations power that should be selected for use China " 3-1 " Or " 4-1 " Ring network last way,wire harness density for midtown or load high power supply area should take one pair of ring networks as the core. Build and transform restriction of fund by power transformer substation, urban distribution network should can accomplish " 2-1 " at least Only surround by network, both as being the spare, turn on by network structure that ring operate. What the urban distribution network in our city is adopted, in order to surround the network, is both as the spare wiring way only at present, the wire harness reliable rate is at least 99.97% to supply power.
The establishment that the Cable Assembly network node of urban distribution should be possible is the public distribution room, use the network on-load switch cupboard of the ring, reduce railway carriage or compartment type becoming and use of the Cable Assembly branch case, in this way can raise, mix network supply power reliable rate and operation management level greatly. Ring network switchgear choose expanded SF6 in unison or vacuum surround network supply power Entrance, and according to mixing the automatic requirement of the network and disposing the interface in the future.
4 strengthens Cable Assembly construction and operation and management
4.1 The Cable Assembly circuit constructs
The urban Cable Assembly project construction quality of distribution line concerns service life of the Cable Assembly circuit and operation maintenance directly, so must manage the construction course in an all-round way. The terminal making craft of the Cable Assembly must be controlled strictly. Relevant statistics, more than 95% of Cable Assembly trouble are from the head trouble of the Cable Assembly. The reasons mostly relate to make craft and quality at that time. So the making of the terminal very beginning of the Cable Assembly must be be carried on by the personnel of professional technical training. The necessary reliable ground of both ends of insulating other shielding layer of terminal head of Cable Assembly, the area of earthing copper wire is not smaller than 25mm2.
4.2 Operation and management
The management of the urban distribution Cable Assembly circuit should carry on standardized management according to relevant systems. Including the preventative experiment work of Cable Assembly circuit, the capable online parameter measurement of development Cable Assembly; Prevent the external force from destroying; Operate management of the materials,etc.. Among them operate the foundation that the management of the materials is the operation and management. Because the Cable Assembly circuit is to conceal the project, had better introduce and mix the management information system of operation of network, combine the geographical information system (GIS) . Cover, include Cable Assembly apparatus TV station account, operate sets of account, overhaul management, defective management, trouble record, test and record etc..
5 conclusions
The distribution of splices Cable Assembly process of the city concerns the economic development of the city directly, it is one of the important infrastructure of modernization of city. Must consider several respects such as urban development planning, existing electric wire netting and engineering level, fund input, splices constructing and operation and management synthetically in construction and transformation of the urban Cable Assembly, in order to benefit security of the final electric wire netting, high-quality, economical operation.
