This photo refers to our 220KV 2-1I3-SZ1 multi circuit tangent and transmission tower, it is widely used in our Chinese market. Some of technical features of this tower as follow:
1 climate condition
| Item | Temperature (ºC) | Wind speed (m/s) | Ice thickness (mm) |
| Max. temperature | 40 | 0 | 0 |
| Mini. temperature | -20 | 0 | 0 |
| Ice thickness | -5 | 10 | 10 |
| Basic wind speed | -5 | 23.5 | 0 |
| Installation condition | -10 | 10 | 0 |
| Annual temperature | 10 | 0 | 0 |
| Lightning overvoltage | 15 | 10 | 0 |
| Operation overvoltage | 10 | 15 | 0 |
2 Technical specification of conductor and OPGW
|
Item |
Conductor | OPGW | |
| LJG-400/35 | JLB40-150 | ||
|
construction |
AL | 48/3.22 | 48/3.22 |
| Steel(Al wrap steel ) | 7/2.50 | 7/2.50 | |
|
Cross-section (mm2) |
Al | 425.24 | 425.24 |
| Steel | 26.82 | 26.82 | |
| Total | 1.349 | 1.3263 | |
| Diameter | 103900 | 111770 | |
| Length mass (kg/km) | 0.07389 | 0.0736 | |
| Elastic module (MPa) | 65000 | 64300 | |
| coefficient of linear expansion (1/ºC) | 20.5×10-6 | 15.5×10-6 | |
|
Tower type |
Horizontal span (m) |
Vertical Span (m) |
Angle º |
Nominal height  27 |
| 2-1I3-SZ1 | 400 | 500 | 0 | tower weight Kg 36.7 |
|
Power voltage |
220kv 2-1I3-SZ1 |
Conductor type |
LJG-400/35 |
Max. operation Tension force (KN/phase) |
157930 |
Un-balance Stress value(%) |
20 |
|
OPGW Type |
JLB40-150 |
Max. operation Tension force (KN/pc) |
25891 |
Un-balance Stress value(%) |
100 Â |
|
Item  |
Horizontal span (m) |
Vertical Span (m) |
Representative Span (m) |
Angle º |
Height (m) |
KV Â |
| data | 400 | 500 | Â | 0 | 27 | / |
|
Site condition |
Normal operation condition | Accident condition |
Installation condition |
||||||
| Basic wind speed | Ice |
Mini. temperature |
Non- broken |
broken | |||||
|
Climate condition (t/v/b) |
-5/27/0 | -5/10/5 | -20/0/0 | Â | Â | -10/10/10 | |||
| Horizontal loading | conductor | 16130 | 4860 | 0 | Â | Â | 2950 | ||
|
Insulator Power fitting |
 |  |  |  |  |  | |||
| Jump | 328 | 50 | 0 | Â | Â | 45 | |||
| Jump & string | Â | Â | Â | Â | Â | Â | |||
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