Ultra-high voltage cable in line three security requirements:
(1) to establish accurate, reliable and secure communication system. Need to operate the power switch to the nearest, suspended cable traction at any time, ensure the cable equipment against losses. 1) in the cable, hoist and its key parts position bell switch, electric bell, radios and other devices, and hold people operating and monitoring. 2) make unified command signal and action rules, the control to rapid and reliable, because of the simplicity of the signal to before the cable laying should be control signal system installation and debugging and use method of signal device to all the staff of laying cable.
(2) take the necessary safety technical measures. 1) USES the brake line of the rotation of the disk. 2) use the twister eliminate the torsional stress. 3) install the tension meter monitor traction size. When laying on the hoist and installed on both ends of the cable tension machine, when traction over the allowable values of cable laying, can rapidly through controlled contact equipment to cut off power supply.
(3) other matters should be paid attention to safety. 1) before laying fixed plug should be used when the temporary power box, power box shell must be reliable grounding. 2) cable drag, it is forbidden to move the cable with the hand, in case of crushed. Cable traction, all personnel are strictly prohibited in the traction angles stay, construction personnel should be on the safe position, spirit is concentrated, to obey the unified command. 3) in laying parts of the shaft and tunnel is relatively complex, the construction of such as have the sudden power failure, should immediately brake line plate and tighten all the anchor rope tight.
