sectional clearences
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7/30/2019 Sectional Clearences
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Ph-E (mm) Ph-Ph (mm)
36 170 - 320 320 2800
72.5 325 - 630 630 3100
450 - 900 3400
550 - 1100 1100 3700
550 - 1100 1100 3700
650 - 1300 1300 3800
950 - 1900 1900 4300
1050 - 2100 2100 4600
3400* *
- 4200**
800 21001550 (Ph-E)
2550 (Ph-Ph)6400* 9400** 10300
* Based on Rod structure air gap
**Based on rod conductor air gap
As per CBIP page no-44, PDF-52
6400
145
245
420
123
14251050 (Ph-E)
1575 (Ph-Ph)
Minimum CleareancesHighest
system
Voltage (kV)
Lighting
impulse
Voltage (kVp)
Switching
impulse
Voltage (kVp)
Safety
clearences
(mm)
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