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19.9.5 Maintenance of Electrical Point Detector (EPD)
Maintenance schedule as shown in Annexure: 19-MS3 shall be followed.
19.9.6 Maintenance of Circuit Controller
Railways having these equipments may refer to earlier version of SEM Part-II,
September 2001. These shall not be used in new installations and the existing
one to be replaced in phased manner, except in few cases like LC gates.
19.9.7 Maintenance of Station Master's Slide Control Frames
Railways still having these equipments may refer to previous version of SEM
Part-II, September 2001.These shall not be used in new installations and the
existing one to be replaced in phased manner.
19.9.8 Maintenance of Electric Key Transmitters, Fuse & Fuse Alarm Systems
Maintenance schedules as shown in Annexure: 19-MS4 shall be followed for
Electric Key Transmitters.
Maintenance schedules as shown in Annexure: 19-MS5 shall be followed for
Fuse & Fuse Alarm Systems.
19.9.9 Maintenance of Thick Web Switch Point Machine: Maintenance instructions
issued by RDSO and Zonal Railways shall be followed.
19.9.10 Maintenance Schedules
The maintenance schedule for various Signalling equipment are given in
Appendix-I. At stations having dense traffic and high speeds, Zonal Railways
may prescribe more intensive schedules as considered necessary.
Section 10: Lightning & Surge Protection for Outdoor
Equipment
19.10.1 Lightning and Surge protection shall be provided for Axle Counter Systems,
IPS and Electronic Interlocking, IB huts/Goomties etc.
19.10.2 Installations to be Protected:
(a) Equi-potential bonding to be provided for all the equipment for effective
lightning and surge protection in Signal Equipment Rooms, such as End
goomties/cabins.
(b) External Lightning Protection and Class/Type I, II & III devices are to be
provided at
(i) External Lightning Protection on Top of Buildings housing S&T Equipment.
(ii) Class B/Type-I devices at the Input of Power Supply Equipment.
(iii) Class C/Type-II devices at Output of Power Supply Equipment.
(iv) Class D/Type-III devices at Indoor and Field Equipment.
Chapter 19: Installation, Testing & Maintenance of Signalling Equipment Page 408 of 535
