1.Wire drums need to be stored with stoppers to avoid moving
2.Accessories such as wire sleeves and terminals should be stored in an indoor room to avoid the wet
3.As insulators are fragile, they should be stored in a wooden box and avoid accumulating
4.Accessories should be classified in every (types of) tower.
Article 46. Storage of Cement
The quality of cement is degraded when it is exposedto the air. It can be kept in good condition for approximately three months with appropriate preservation. Cement bag should be closed tightly, and covered with a plastic sheet from the top. Cement mixed with water beforehand must not be used.
Article 47. Storage of Explosive Materials and Warhead
The location to store explosives should be clearly distinguished from the other storage and managed with a lock.
The storage should be located far from the boundary where the storage can be kept away from the public.
Section 4 REQUIREMENTS ON CONSTRUCTION WORKS FOR INSTALLATION OF ELECTRICAL EQUIPMENT
Article 48. Plan preparation before installation of equipment
1. Loading road
Loading roads should withstand the weight of vehicles and materials to transport. The width of the road shall be wide enough considering safety of vehicle and conveyance of materials.
2. Resting room
Considering workers to evacuate from bad weather and to take rests, resting rooms or tents are necessary to be set at each work site. The location of the rooms should not interfere with construction.
3. On-site office
Set up an on-site temporally office for construction works. The location of the office should be easily accessed as well as convenient to transport materials
4. Fire extinction facilities
At the place that fire engines can not reach, prepare potable fire extinguishers which is not expired.
5. Lifting facilities
Appropriate measures should be taken for scaffoldings and ladders to prevent turnover and fall.
6. Water supply
Water supply facilities are necessary for workers.
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Article 49. Preparatory order of construction
As stipulated in Technical Regulation
Article 50. Works inspection and acceptance report
Refer to article 249 of Vol.4.
Article 51. Basis for acceptance of Works
Acceptance test is mentioned in Vol.5.
Article 52. Acceptance of Order
Acceptance test is mentioned in Vol.5.
Article 53. Prefabricated construction items
As stipulated in Technical Regulation
Article 54. Items on wall and utility gallery
As stipulated in Technical Regulation.
Article 55. Underground electrical projects
Underground electric materials should be confirmed their size and strength from factory inspection.
Article 56. Installation of construction machines
As stipulated in Technical Regulation.
Article 57. Other items in the design document
As stipulated in Technical Regulation.
Article 58. Machine foundation
As stipulated in Technical Regulation.
Section 5 TECHNOLOGY AND AUTOMATION FOR POWER INSTALLATION
WORK
Article 59. Assembly at workshop
As stipulated in Technical Regulation.
Article 60. Welder
As the quality of welding is important, welders should be trained well and have sufficient knowledge and techniques. All the welders need to have the qualifications of welding.
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Article 61. Installation of main bus bars
As stipulated in Technical Regulation.
Article 62. Working overhead line without crane
As stipulated in Technical Regulation.
Article 63. Tensioning of big size electric wire
It is recommended to use a tower winch to practically adjust sag of multiple conductors’ line so that it enables to reduce the labor force.
Article 64. Transportation of large equipment
When there is no ceiling crane in a room, heavy equipment should be moved by using a cartairor caster to prevent vibrations and turning over.
If the load limit is not enough for the equipment, put an iron plate on the floor to disperse their weight evenly.
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Figure 64 Transportation of large equipment
Article 65. Installation of electric switchboards and cubicles
When an old switch boards or cubicles need to be replaced to a new one, the old equipment need to be removed from the channel base as follows. The removal work should not cause vibration to prevent the miss trip of the protective relay if there is a protective relaynext to the equipment. To lock the relay is one of recommendable measures.
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Metal
Roller Plate
-First tilt the target equipment to |
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Figure 65 Removal method example of electrical equipment
Article 66. Transportation and preservation of high voltage oil soaked insulators
As stipulated in Technical Regulation.
Article 67. Installation of earthing equipment
To install earthing equipment deeply under the ground, it is recommended to make deep holes by using special drill and water jet, and then insert earth rods in it.
Article 68. Transportation of transformer
As stipulated in Technical Regulation.
Article 69. Installation of electrical equipment
It is the easiest way to use a crane in installation of electrical equipment, but it is strongly suggested to check carefully the environment around work site. If there are hot linesnearby, roller is a useful way to move heavy equipment. (see article 64 and 65)
The minimum clearance between a crane and hot wire is stipulated in article 335 of Vol.1 of Technical Regulation.
Article 70. Unloading and transportation of cables
As cable drums are very heavy, transportation danloading works need to be carried out by using forklift or crane to prevent them from damages
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Figure 70 Transport cable drums
Article 71. Cables crossing over railway and national road
An underground cable is recommended when a cable line crosses over a railway or national road.
Refer to the guidelineVol.1 for more details.
Article 72. Construction of underground cables
The following cable laying accessories should be used in the cable laying work not to apply partial tensile stress to the cable.
Cable Feeder |
Power ball |
Cable rolle |
Cable drum
Figure 72 Installation of underground cables
Article 73. Mechanization in construction of transmission line
As stipulated in Technical Regulation.
Article 74. Transportation of concrete poles
To secure the safety it needs to keep balanceof concrete pole on a vehicle during the transportation. Also, balance the left and right side of a jack to avoid turnover when pulling a cable out from a cable drum.
Article 75. Construction of pole foundation
As stipulated in Technical Regulation.
Article 76. Construction of pole foundation in rocky mountainous areas
Refer to article 67.
Article 77. Installation of concrete poles
Heavy machinery such as a crane should be used at the time of installation of concrete poles.
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Figure 77 Pole assembly by crane
Article 78. Anchor poles when pulling wire
As stipulated in Technical Regulation.
Article 79. Construction of steel poles
Heavy machinery such as a crane should be used to install steel poles.
If there are hot power lines near the site,use rubber tubes around thelive wire to prevent electric shock.
Article 80. Laying conductor and earthing wire
The cable winch or the motor winch should be usedfor laying conductor and earthing wire. During the operation of cable winch, it is vital to make sure the right balance of the machine to prevent from overthrown the heavy cable.
Figure 80 Laying wires by cable winch
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