1. HUNGER_RU_author_Session 1_Block 5 Barcelona 12-15 May 2003 1 Steel Supports of the Bent Profile for Distribution Power Lines of 6-110 kV Voltages. Yury R. HUNGER A. A. Zevin Russia

2. HUNGER_RU_author_Session 1_Block 5 Barcelona 12-15 May 2003 2 Tower and pole supports AdvantagesDisadvantages Tower 1. Low weight. 2. Easy to produce. 3. Easy to climb. 4. No air-tightness. 1. Big sections. 2. Four foundations. 3. Hard to erect. 4. Hart to transport. Pole 1. Narrow base. 2. One foundation. 3. Dynamic flexibility. 4. Easy to transport. 5. Easy to erect. 1. High weight. 2. Air-tightness. 3. Unclimbable. 4. Hard to produce.

3. HUNGER_RU_author_Session 1_Block 5 Barcelona 12-15 May 2003 3 The support for OHL 6-10 kV Item (per km) Conc rete ourDifference (%) Span (m)50100200 Number of supports2010200 Supports’ weight (t)233.2720 Foundations’ weight (t)8.82.9300 Total weight (t)31.86.1520 Ground work volume (m3) 246400 Railroad transportation (number of cars) 0.60.2 2 270 Trailer transportation (number of routes) 50.51000

4. HUNGER_RU_author_Session 1_Block 5 Barcelona 12-15 May 2003 4 The support for OHL 35-110 kV Item (per km) towerourDiffer ence (%) Number of supports3.33.6-10 Supports’ weight (t)8.64.8180 Foundations’ weight (t)322.21450 Total weight (t)40.67.0580 Ground work volume (m3) 13.33.3400 Railroad transportation (number of cars) 1.00.6170 Trailer transportation (number of routes) 101.2830

5. HUNGER_RU_author_Session 1_Block 5 Barcelona 12-15 May 2003 5 Conclusions The new types of supports for OHL of 6-110 kV: -are designed; -combine the advantages of tower and pole supports; -have better characteristics than all existing supports.