RAILWAYS CROSSINGS :
Vertical Clearance : The minimum height above rail level of the lowest portion of any conductor of crossing including guard wire, under conditions of maximum. |
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Table 1 |
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Voltage |
Category - A 9 Section electrical on 1500 V.D.C.) |
Category - B (Section already electrified or likely to be converted for eletrified on 25 KV AC Systems) |
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|
Inside Stn. Limits (mts) |
Outside Stn. Limits (mts) |
Inside Stn. Limits (mts) |
Outside Stn. Limits (mts) |
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Upto |
Only by cable |
Only by cable |
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Above 11 KV |
13.28 |
11.28 |
15.28 |
13.28 |
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Up to 33 KV |
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Above 33 KV |
13.59 |
11.59 |
15.59 |
13.59 |
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Up to 66 KV |
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Above 66 KV |
13.89 |
11.89 |
15.89 |
13.89 |
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Up to below 110 KV |
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For 110 KV |
14.2 |
12.2 |
16.2 |
14.2 |
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and 132 KV |
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For 220 KV |
15.11 |
13.11 |
17.11 |
15.11 |
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For 440 KV |
16.63 |
14.63 |
18.63 |
16.63 |
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Note : While calculating the above clearance railways HT lines running over the 1500 V.D.C traction structure in some sections have not been taken into consideration. |
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Voltage |
Broad Guages |
Metre and narrow guages |
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|
Inside Stn. Limits (mts) |
Outside Stn. Limits (mts) |
Inside Stn. Limits (mts) |
Outside Stn. Limits (mts) |
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Up to 11 KV |
Only by cable |
Only by cable |
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Above 11 KV |
10.6 |
7.62 |
8.84 |
6.4 |
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Up to 33 KV |
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Above 33 KV |
10.36 |
7.92 |
9.15 |
6.71 |
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Up to 66 KV |
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Above 66 KV |
10.67 |
8.23 |
9.45 |
7.01 |
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Up to below 110 KV |
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For 110 KV |
10.97 |
8.53 |
9.76 |
7.32 |
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and 132 KV |
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For 220 KV |
11.89 |
9.45 |
10.65 |
8.23 |
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For 440 KV |
13.41 |
10.97 |
12.19 |
9.75 |
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Note : |
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1) If the crossing is located on a metre guage or a Narrow guage likely to be converted to broad guage, clearances applicable to Broad guage shall be adopted 9Section 18-3). |
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2) Station limits shall be taken to mean all tracks lying in the area between the outer most signals of a railway Section (Section 18-4). |
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3) U.G. cable pipe structure should be at 5 meters away from railway power support to be Located by Railway authority (Section 30-1). |
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4) The spun concrete pipe encasting cable under the tracks should be laid at not than 1 metre below the surface of formation level and upto a minimum distance of 3 meters from the nearest track either side (Section 33-1). |
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