ieee.c2.1997_2 155
DESCRIPTION
aTRANSCRIPT
-
235Blb(1)
Voltage between
conductors 915 (kV)
2.4 375
4.16 390
12.47 450
13.2 455
13.8 460
14.4 465
24.94 545
34.5 620
46 705
PART 2. SAFETY RULES FOR OVERHEAD LINES
Table 235-2 Horizontal Clearances Between Line Conductors
Smaller Than A WG No.2 at Supports, Based on Sags (See also Rule 235Blb.)
Sag (mm)
1220 1830 2440 3050
Horizontal clearance (mm)
520 730 890 1025
535 745 905 1040
595 805 965 1100
605 810 970 1105
605 815 975 1110
610 820 980 1115
695 900 1060 1195
765 975 1135 1270
855 1060 1220 1355
1 Clearance determined by Table 235-1, Rule 235B 1 a.
NOTE: Clearance = 7.6 (kV) + 20.4 Js - 610, where S is the sag in millimeters.
Voltage between
conductors 36 (kV)
2.4 14.7
4.16 15.3
12.47 17.7
13.2 18.0
13.8 18.1
14.4 18.3
24.94 21.5
34.5 24.4
46 27.8
Table 235-2 Horizontal Clearances Between Line Conductors
Smaller Than A WG No.2 at Supports, Based on Sags (See also Rule 235Blb.)
Sag (in)
48 72 96 120
Horizontal clearance (in)
20.5 28.7 35.0 40.3
21.1 29.3 35.6 40.9
23.5 31.7 38.0 43.3
23.8 32.0 38.3 43.6
23.9 32.1 38.4 43.7
24.1 32.3 38.6 43.9
27.3 35.5 41.8 47.1
30.2 38.4 44.7 50.0
33.6 41.8 48.1 53.4
1 Clearance determined by Table 235-1, Rule 235B 1 a.
NOTE: Clearance = 0.3 (kV) + 4.04 Js - 24, where S is the sag in inches.
117
235B 1 b(l)
m
But not less
4570 6095 than1
1300 1525 300
1315 1540 300
1375 1605 345
1385 1610 350
1385 1615 355
1390 1620 365
1475 1700 470
1545 1775 570
1635 1860 685
in
But not less
180 240 than l
51.2 60.1 12.0
51.8 60.7 12.0
54.2 63.1 13.5
54.5 63.4 13.8
54.6 63.5 14.0
54.8 63.7 14.3
58.0 66.9 18.5
60.9 69.8 22.4
64.3 73.2 26.9