Many companies talk about their “eco credentials” but at Tratos we put our environmental policy into action.
Our packaging is manufactured from recycled material, including recycled wood for our drums. The packaging is produced close to our cable manufacturing site, reducing travel requirements and subsequent emissions.
We are very much committed to reducing our impact on the environment and aim to keep our packaging’s carbon footprint as low as possible as a further step to achieving this.
Below you can find recommendations and advice regarding the installation and packaging of Tratos special cables.
Storage, handling, installation and packaging guide
STORAGE AND HANDLING
The drums storage and movement shall be carried out with crane or forklift truck. It is not allowed to drop drums from the truck to the floor. All cables during transport and handling can be demaged so we suggest to verify before and during installation procedure any possible demage to avoid heavy problems during cable working life. For the benefit of the workers involved in electrical work is absolutely necessary to observe some safety rules normaly indicated on the local still in force standards.
Do not remove staves and cable end caps until the cable will be laid down. If you cut a piece of cable leaving the rest in a open stock put on again ends protections. Unwind and rewind cables as shown in the pictures. In case of transfering from one drum to an other remember the minimum bending cable radius and consequently the barrel drum diameter.
We summarize some rules to be observed during the installation of MV cables for fixed layng. In order to provide easy operations we suggest do not work at cable temperature below than 5°C. Cables bending radius are indicated in Range and Dimensions tables and they must be to value carefully. For unarmoured cables and in order to pull cable inside pipes or trench it is advisable to apply the pool force on the conductors being careful do not exceed 5 kg/mm2 of total area for copper cables and 3 kg/mm2 for aluminium cables.
copper cable 1 x 240 mm2: max pull force kg 1200
aluminium cable 1 x 240 mm2: max pull force kg 720
copper cable 3 x 240 mm2: max pull force kg 3600
aluminium cable 3 x 240 mm2: max pull force kg 2160
For steel cable armour the strain rope will be applied to the armour while the pool force by steel braid is advisable only for limited efforts.
If there are curves along the lay route must be placed a sufficients conveyers, for example at the entrance of pipes, suitable to keep the cable in the right direction line in order to avoid to exceed the maximum pulling load allowed.
Concerning overhead cables any strain will be charged on the supporting rope for installaion operations and during working time.
Besides data reported in this booklet is always important to consider the effects of thermal dissipation.
All installations in parallel trefoil must be realized with maximum care in order to aim the most balanced charge distribution on the cables connected to the same phase. Therefore please consider the following infomation:
• all cables must have the same metal conductors
• all cables must have the same lenght and section
• the bundle cables must be made-up following R, S and T phases system as indicated on page 25
• the cables must be properly spaced
• right and balanced connections to the cables terminals
DRUMS CAPACITY (meters)
HOW TO SELECT THE DRUM
1 - kind cable ARE4H1R-12/20 kV 1x240 mm2 see page 16 overall cable diameter mm 39.1 a round figure mm 40 minimum bending radius mm 560 cable quantity mt 500
2 - determination of drum barrel diameter = mm 560 x 2 = 1120 mm consequently qualified drums are BL180/ 200/ 220/ 250.
3 - outcome = following above practice the more convenient drum able to contain mt 500 is BL 18
The data belong to the standard wooden drums daily in force in all Tratos Cavi facilities. Neverthless for uncommon cable lengths there are available very large wooden and metallic drums. In this cases transport resctrictions have to be considered like special law-loading trailers and permits from traffic authorities in accordance with local regulations.
TRATOS CAVI S.p.a reserves the right to make at any time without previous notice, variations on productsdescribed in this catalogue. Moreover TRATOS CAVI S.p.a shall not have any responsibility for improper use of it’s electrical cables.