ISO7241-1B
interchange series Quick Couplings features a rugged ball latch mechanism with automatic self-sealing poppet
valves in a wide array of port configurations and multiple valved and non-valved
configurations. Self-sealing poppet valve design provide excellent high and low
pressure sealing. The Quick Coupling have standard seal material-Buna-N, others
seal options available in PTFE, Neoprene, Fluorocarbon, EPDM, and Kalrez .The Quick Coupling have standard body
material-zinc plated steel with stainless steel springs, balls and retaining
rings.
ISO7241-B Series Quick Coupling Quick Connect Coupling,Hydraulic Quick Coupler,Hydraulic Coupling,Iso7241 B Series Quick Couplings XINXIANG PINGYUAN AVIATION HYDRAULIC EQUIPMENTS CO.,LTD , https://www.coupling.pl
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The operation quality, safety and reliability of the power supply system are not only related to the quality of the wire and cable itself, but also related to the construction quality of the cable accessories and lines.
1. How to lay the cable
The laying methods of cables are as follows: There are advantages and disadvantages in the methods of direct burial laying, pipe laying, shallow groove laying, cable trench laying, cable tunnel laying and overhead laying. Generally speaking, urban development plans must be taken into account. Existing buildings The density of cable lengths and the effect of the surrounding environment. From a technical comparison, the cable tunneling method and the laying of cable trenches are convenient for the construction, maintenance and overhaul of cables. Direct laying and shallow trough laying are economical methods of laying. Buried cables are the most economical and widely used method of electrical laying. They are used in places where suburban and vehicle traffic are less frequent. But it is not conducive to the maintenance and overhaul of the cable. Once a cable fault is encountered, even if the tester is used to measure the fault, it is necessary to re-open the cable trench. This is extremely inconvenient. Therefore, the choice of cable laying methods must be based on actual conditions and based on factors such as engineering conditions, environmental characteristics, cable types and quantities, and development perspectives, and should be determined in accordance with the requirements of meeting operational reliability, ease of maintenance, and technical and economical rationality.
2. Cable selection
The commonly used power cables include oil-impregnated cables, PVC insulated cables, cross-linked polyethylene cables, and the like, which are extended to different types of special cables depending on the occasion. Selecting specific conditions to minimize crossings of various pipe-edge railways, highways, and communication cables; when using direct-buried and shallow-slot laying methods, consideration should be given to the use of steel cables.
3. Selection of cable cross-sectional area
The choice of cable cross-section area relates to the amount of investment, the loss of the line and voltage quality, and the service life of the cable. If the cross-sectional area is selected to be too small, the quality of the voltage will drop, and the loss of the line will be too large, which will make the initial investment too high. Therefore, according to the load forecasting results, the development plan should be selected and the appropriate cross-sectional area should be selected so that the power cable can meet the core temperature requirements and voltage drop requirements under the maximum operating current, and the thermal stability requirements under the action of the maximum short-circuit current.
November 08, 2019