remote control equipment - Indian Railways Institute of Electrical ...

(e) Overhaul, bench tests and calibration: these are necessary once
in ten years or when a relay is not found functioning correctly.
This work should invariably be carried out only in the Central
Repair Shop by tightly skilled technicians fully conversant with
all details of construction and adjustment.
The bench tests and final calibration should be carried out after overhaul of
the moving parts and measurement of coil resistance and other data. Transport of
the relays to and from the Central Repair Shop also requires utmost care including
locking of the moving parts, and careful packing and handling. When laboratory tests
are fully satisfactory, the relays should be sealed and date of overhaul painted on the
outer cover of the relay.
3.3.8 Guidelines for Maintenance of Switching Stations
The maintenance required for equipment in switching stations is more or less
similar to that for traction sub-station equipment, except that traction transformers,
circuit breakers and current transformers are not present and area is much smaller.
However, the only additional but important item which requires attention is condition
of the return feeder connection to all the rails (at the feeding posts). These return
feeder connections are liable to be damaged by Permanent Way gangs in their
normal work of packing and maintaining the permanent way. Supervisory officials,
therefore, should stress the importance of these from the electrical point of view to
the PWIs so that they in turn may wan their maintenance gangs not to damage the
connections. In addition, the supervisory officials shall, during their periodical
inspections, make it a point to inspect the return feeder rail connections and ensure
that they are in excellent condition.
3.4. MAINTENANCE SCHEDULES
3.4.1. Schedules of Inspection
1. in order to achieve high reliability and ZERO DEFECT, and to ensure
effective checks on the maintenance work minimum schedules of
inspections to be carried out each month by the TrD officers and Senior
Subordinates in charge of operation and maintenance of PSI
equipments, are indicated at Annexure 2.01.
The schedule of inspections as indicated is the minimum quota to each
official per month and should be independent of other tasks. They will
not be of routine nature but shall be carried out in depth to identify:
i) Deficiencies and short comings.
II) Lack of skill amongst staff.
III) Inadequate in maintenance facilities.
IV) Constraints experienced.
V) Conditions of environment which lead to poor quality of work if
any.
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