Carrying, installation, store the stress that the cable in reaching use process can be differred, such as: Mechanical stress, temperature, humidity or sun's rays. Below these ambient conditions, cable also ought to have reliable property. Accordingly ought to special understand and comply with these operations and installation are normative, all sorts of conditions in still answering to use cable at the same time consider inside. The rigid structure of cable depends on installation means and environment. When the structure of cable and raw material should assure to should have operation and setup according to the regulation, cable can maintain what its appoint to transmit function in whole use process.
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1, carry reach memory
The line should assure when carry dish always be erect place, such layers that wind a string just can keep former, there also won't be any problems when taking a line. To prevent cable inattentive, mobile line dish when should its according to the line dish the demonstrative arrowhead on side panel has roll. Line dish crane or forklift should be used when mount or discharge leave car. Drop about line dish can mix to cable line dish cause loss. Line dish should connect its and fixed base together when carry, in order to prevent shift. Shun pair of lines as far as possible Pan Chong is attacked or elapse, until must not get rid of before installation line dish the baffle outside.
The proposal adopts indoor memory cable. If have the store outdoor, should avoid sun's rays point-blank or successional moisture. Should the terminal that special attention protects cable, avoid be affected with damp be affected with damp, the proposal uses shrink sex to protect coat.
2, installation
2.1 installation are basic program, consult next graphs 1.
1) preparation works. The installation of line of make a present of passes pulley, car to be its installation on iron tower commonly, get stuck to had secured its through line of make a present of. Accordingly, head of window of line of card of line of rope of the iron tower that should want place before installation, condole, pulley, make a present of, ground connection card, make a present of, join and corresponding tool get ready.
2) of cable of wire of make a present of put roll with promotion. Carefully cable dish debus comes, put online dish on bracket. Tear open the baffle outside open quotation, edge arrowhead direction takes out cable, with bind a rope to secure cable go up in condole rope, pull a string through capstan drawing, cable promotion reachs ideal height point.
3) of cable of wire of make a present of fixed. Cable of wire of vertical section make a present of gets stuck to secure cable with line of make a present of go up in iron tower, the span between card of line of photograph adjacent make a present of suggests to be between 1.0~1.5 rice, level paragraph cable of wire of make a present of is secured with perpendicular rings ladder climbs in the level, rings span can be between 3.5~4.5 rice.
4) the ground connection of line of make a present of. Below normal circumstance, to prevent the be struck by lightning of system of day make a present of, line of make a present of must have 3 to handle ground connection, if pursue 2.
·1/2 ″ jumps the 10~15cm below the line is in must ground connection;
·Perpendicular lower end and level climb line of make a present of ladder is conterminous around must ground connection;
·Before line of make a present of enters a computer room must ground connection.
·If length of line of make a present of exceeds 50 meters, criterion among require ground contact.
5) join. With proper join head, line of make a present of, jump line and antenna, line of make a present of, jump line and join of computer room catapult rise, comprise a complete day make a present of system of line radical station.
2.2 installation note
1) the limiting value that each phase that installing ought to observe installation standard or manufacturer place offers. It is the numerical value of most fundamental a few maximums when installation below:
·Drawing reachs the radius of the smallest curved mist when bending finally
·Lowest installs temperature
·The largest pulling force
Graph 1 cable installs sketch map
Graph sketch map of 2 cable ground connection (in the graph " 3 " for ground connection position)
The regulation of the smallest radius of bend is to won't be opposite when bend the knot of cable constructs to damage. Too previous bend (already angle of bend is very small) can make cable twist off, create cable character thereby impedance is local inside change, should change the transmission function of cable. The smallest radius of bend basically is aimed at the following two kinds of circumstances: When drawing and final installation. The to the smallest radius of bend requirement when be being installed finally is more more slashing than be when drawing. This value basically depends on the structure of cable, in the smallest radius of bend that every kinds of cable already gave out in structural function index.
Lowermost installation temperature basically is the same as plastic the mechanical function that reachs cable other to make material is concerned. Below microtherm, plastic meeting hardens and suffer damage easily, disconnect for instance or split. Should notice this lowest temperature is the temperature of environment of temperature and rather than of cable. Usually, indoor for - 40 ℃ , outdoors it is - 20 ℃ .
The largest tensile force depends on the metallic cross section of cable. Should the guidance according to cable manufacturer tensile force even action at departmental cent. The largest tensile force is concerned with the construction of cable, this numerical value is offerred by manufacturer. "8 " the largest tensile force is the same as word tectonic cable the intensity of plumb-line is relevant.
2) in all unit process of cargo bandling, answer to prevent the following situation as far as possible:
·Press too;
·Overwhelm on sharp or pointed horn;
·Undertake punch or jerk to cable;
·With sharp or rough surface attrition;
·Excessive and screwy cable;
·Redundant arc is formed on cable.
·The largest pulling force.
3) the terminal of cable matchs impedance value to should comparative with the characteristic impedance of cable.
4) if have specific provision or electromotive force difference too when congress is harmed to person or other equipment, should cable ground connection. The ground connection end of cable had better match for the terminal of cable place.
Installation of 2.3 leakage cable considers a factor
1) leakage discharge installs the position in channel
The position of cable is very large to coupling loss influence, the leakage discharge cable that installation is in in corner of channel cross section does a test, can detect the coupling loss increment that is as high as 13dB.
Normally, we suggest the position of cable leaves corner of every cross section at least 1 Mi Yuan. First-rate installation plan is cable condole is in of channel coping in the middle of the half height of occasional installation wall.
2) the distance of cable and ground
Leakage discharge cable and surface (or the ceiling or wall, install to want a basis
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