IRSE News 138 Oct 08.pdf

TECHNICAL
IRSE
Figure 5
Details of wiring in the point machine
and point JB during commissioning
MANPOWER PLANNING
This was one of the most important
aspects for the success. Proper planning
was done well in advance for deployment
of staff to achieve the goal of completing
the changeover to new RRI system within
the 24 hr. possession. All the activities
involved, necessary instructions and guidelines
to follow during commissioning were
documented along with distribution of work
to each team, mode of testing & commissioning
within a specified time period.
Competent signalling staff were
arranged from different zonal railways in
order to form a number of teams to take
up work simultaneously at site for
changeover of equipment, followed by
testing and commissioning. Many teams
were formed, viz. 12 points teams, 5 signal
teams, 2 track circuit teams, 3 fringe
teams, 2 crank handle teams, 1 intermediate
CT rack team, 1 new relay room
CT rack team, 2 new relay room teams and
2 central panel teams. Each team was led
by one team leader to communicate with
other teams and to ensure that all guidelines
were strictly followed. Each team
was comprised of 4 to 5 people on
average.
Each team was assigned specific jobs
and was provided with list of equipment to
be commissioned and a change-over
arrangement drawing for each item. Each
and every staff member involved in the
commissioning was asked to report to site
sufficiently in advance and were briefed
about the commissioning programme, the
role of each individual and details of
activities involved during changeover to
new system. An extensive training
including mock trial was also conducted
for the benefit of each of the participant in
order to make them aware of their role
during commissioning and to make them
conversant with the activities involved in
the work allotted to them.
Team Teams Equipment
handled
Point 12 151 point
machines
Activities undertaken
Changeover of wiring of point machine from
non-superimposed to superimposed
detection and connection to new system.
Signal 5 176 signals Disconnection of WAGO links connected to
old system and connection of WAGO links to
new system at the intermediate CT rack.
Track
circuit &
Axle
counter
2 157 track
circuit and
10 axle
counters
Connection and disconnection of track
circuits/axle counters as per plan and
energisation of TR/AXR. Disconnection of
TPR/AXPR of the old system and connection
of TPR/AXPR in the new system.
Fringe 3 5 fringes Changeover of fringe circuits from old to new
system.
Crank
handle
2 66 crank
handles
Panel 2 All
trackside
equipment
In order to effectively plan the staff
deploy-ment for commissioning, all the
activities involved in commissioning were
listed out and time required to complete
each activity was evaluated. Trials were
also conducted for trackside equipment for
assessing actual time required for
changeover. Accordingly, the number of
staff required for that particular job was
worked out. The activities undertaken
during the free wheel possession are as
shown in the table below:
Connection of crank handle interlocking
circuit to new system.
To test each point, signal, track circuit, slots
and crank handle from new panel after
connection at site.
Time
taken
3 hours
6 hours
3 hours
2 hours
2 hours
15
hours
12
Issue 138 October 2008
IRSE
NEWS