Page 74 - IRSEM_Main Book

Para No. 3.8.4(b) Annexure: 3-A11

Where Disconnection Notice is not Required

Situations in which disconnection notice need not be issued provided suitable precautions
are taken are as under;

1. Cleaning and/or Lubricating/Graphiting without affecting any Physical Electrical
Disconnection

(a) Lever frame basement.
(b) Relay Room & Battery Room.
(c) Apparatus case/battery boxes/Goomty.
(d) Lifting barrier mechanism including winch.
(e) Lever lock and circuit controller without opening cover.
(f) Inspection and cleaning of inside equipment by opening the covers of point machines,
signal motors, reversers, apparatus cases and detectors.
(g) Point, facing point lock and lock bar.
(h) Cranks, compensators, pullies, wheels, roller stands, counterweights & levers.
(i) Power supply equipment.
(j) Insulation joints.
(k) Lens/roundels of signal, point indicator, trap indicator & shunt permitting indicator provided
phantom indication to driver of an incoming train is prevented by covering lenses.

2. Testing of

(a) Track locking, approach locking, back locking, indication locking, route release.
(b) Checking various parameters of axle counter without disconnecting the equipment.
(c) Power supply equipment.
(d) Lever frame, SM's control frame, signal operation, point operation, level crossing gate & slot
circuits.
(e) Point by obstruction test for lock only.
(f) Checking and testing of track circuit parameters when the track is unoccupied.
(g) Focussing of colour light signal provided phantom indication to Loco pilot of an
incoming train is prevented by covering lenses.

3. Adjustment of

(a) Wire transmission except double wire operated point transmission, where existing.
(b) Tightening of terminals using insulated tools without causing any shorts on adjacent
terminals.

Chapter 3: Duties Of Signal Supervisors And Technical Staff Page 50 of 535