Ningbo Suntech Power Machinery Tools Co.,Ltd. |
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132KV Transmission Line Lattice Steel Tower Erection Construction
Power Site
Transmission lines tower are either monopolar or bipolar systems.
With bipolar systems, a conductor arrangement with one conductor on
each side of the tower is used. On some schemes, the ground
conductor is used as electrode line or ground return. In this case,
it had to be installed with insulators equipped with surge
arrestors on the pylons in order to prevent electrochemical
corrosion of the pylons. For single-pole Suntech transmission with
ground return, towers with only one conductor can be used. In many
cases, however, the towers are designed for later conversion to a
two-pole system. In these cases, often conductors on both sides of
the tower are installed for mechanical reasons. Until the second
pole is needed, it is either used as electrode line or joined in
parallel with the pole in use. In the latter case, the line from
the converter station to the earthing (grounding) electrode is
built as underground cable, as overhead line on a separate right of
way or by using the ground conductors.
Electrode line towers are used in some Suntech schemes to carry the
power line from the converter station to the grounding electrode.
They are similar to structures used for lines with voltages of
10–100 kV, but normally carry only one or two conductors.
Towers may be self-supporting and capable of resisting all forces
due to conductor loads, unbalanced conductors, wind and ice in any
direction. Such towers often have approximately square bases and
usually four points of contact with the ground.
A semi-flexible tower is designed so that it can use overhead
grounding wires to transfer mechanical load to adjacent structures,
if a phase conductor breaks and the structure is subject to
unbalanced loads. This type is useful at extra-high voltages, where
phase conductors are bundled (two or more wires per phase). It is
unlikely for all of them to break at once, barring a catastrophic
crash or storm.
A guyed mast has a very small footprint and relies on guy wires in
tension to support the structure and any unbalanced tension load
from the conductors. A guyed tower can be made in a V shape, which
saves weight and cost.
Product | Steel Structure Tower |
Height | 5m to 100m or other height customer requirement |
Suit for | Electric Power Distribution Transmission Steel Tower |
Shape | Conoid ,Multi-pyramidal,Columniform,polygonal or conical |
Material | Usually Q345B/A572,minimum yield strength>=345n/mm2 |
Q235B/A36,minimum yield strength>=235n/mm2 | |
As well as Hot rolled coil from Q460, ASTM573 GR65, GR50, SS400, SS490, to ST52 | |
Strength | 2.5KN,5KN,8KN,10KN,12KN |
Torlance of the dimenstion | -0.02 |
Optical assembly of lighting fixture | IP 65 |
Electroshock resistant protective grade | Grade I |
The casing anti-corrosion performance | Class II |
Working atmosphere of lighting fixture | -40 ºC~+45 ºC |
Surface treatment | Hot dip galvanized Following ASTM A 123, color polyester power or any other standard by client required |
Joint of Poles | Insert mode, inner flange mode, face to face joint mode |
Design of pole | Against earthquake of 8 grade |
Wind Speed | 160km/hour |
Minimum yield strength | 335mpa |
Minimum ultimate tensile strength | 400mpa |
Max ultimate tensile strength | 620mpa |
Standard | ISO9001 |
Length of per section | Within 14m once forming without slip joint |