How to choose aluminum cable tray ground work
Aluminum cable tray systems engineering design should work closely with the ground and the building structure, technology and related professional to determine the best configuration. Design content shall meet the following requirements:
A system should be designed to meet the total required amount of bridge engineering Cabling. And left margin.
2 should be properly load rating. When estimating the weight of the cable should consider setting aside the weight margin; construction, temporary additional concentrated load maintenance or other special loads need to be considered (such as wind load, snow load, the combination should be properly calculated.
3 system layout diagram should be marked path towards aluminum tray, tray or ladder specifications, floors, all kinds of elbow position, wider, boards and telescoping plate becomes high set point, hanger configuration and relative dimensions.
4 a sectional view of the system shall be marked with the aluminum bridge between the interlayer spacing between the hanger floor elevation, elevation change path toward and hanger installation methods.
5 should be prepared aluminum tray system for the tray, ladder straight, schedules, specifications and quantity of the elbow, and the main hanger attachment, and indicate its load rating and surface corrosion treatment and other technical requirements.
How to choose aluminum cable bridge work the ground, where the linking cables you choose to share their principles:
Select principle aluminum bridge work the ground, to ensure that the test phase and its constitution as a closed loop, so that the instrument can get the correct test waveforms. It should also be noted that the ground must work systematically together, people, equipment, the high pressure to the device and the cable under test to cable tray with four-body bits. To ensure personal safety and equipment intact.
If the cable is phase faults, ground work must be one of the phase line, and do the ground phase system must be linked together. For lead-free casing aluminum tray, high voltage flashover during the test, the vast majority of failures are on the Earth or space discharge. In theory, the relative failure or space to form a closed loop, but in fact the equivalent impedance circuit inside is quite large, so it can not get the correct test waveforms on the instrument. In the test if this is the case can be taken directly to the suspected fault point method to solve. Whatever the ground, its ground must be reliable.