Page 552 - IRSEM_Main Book

7.5.2 COLOUR LIGHT SIGNALS LOCATED BETWEEN TRACKS

(a) SIGNALS WITHOUT ROUTE INDICATORS

No overhead equipment structure shall, as far as possible, be located in the same lane as
Signals for a distance of atleast 600 m before a Signal.

Drop Arms of Portals shall also not normally be located in the lane where Signals are located
atleast for a distance of 600 m before the Signal. Where this is not possible for any reason,
the Signal shall be mounted on an Offset Bracket.

In addition, a special study shall be made in each such case, in respect of these Drop
Arms before the Signal, to see whether the Drop Arms can be offset from the centre line of
the lane in a direction opposite to the Arms. Reduction in the Signal height must also be
examined.

(b) SIGNALS WITH ROUTE INDICATORS

The principles mentioned in the preceding paras shall be observed in this case also.

No part of a colour light Signal without a Route Indicator, shall, as far as possible, be higher
than 5.2 m above rail level. Great care must be exercised in deciding the location of the
colour light Signals with Route Indicators so that the necessary minimum clearances are
available between the Signals and live out of run wires, or pantograph sway zone.

Note:- For Drawing on Distance in Rear from the Signal in Meters for High Rise OHE , Please
refer to Drg .No: 22-D7 in Appendix II.

Chapter 22: Requirements Of Signalling In 25 KV AC Electrified Area Page 495 of 535