Page 450 - IRSEM_Main Book

19.8.2 Test Procedure

(a) Systematic methods such as marking on Control Tables/Locking/selection
tables and suitably and clearly marking on the circuit diagrams while
checking the circuits and equipment should be adopted to ensure that all
circuits have been completely checked.

(b) Suitable proforma should be devised for recording the tests of electrical
equipment before testing of the installation is taken up to ensure availability
of records of the tests and their analysis.

19.8.3 Testing Instruments

Suitable instruments like Multi-meter, Volt meter, Ammeter, Ohmmeter,
Frequency meter, Bell tester, Earth Tester, Earth leakage detector, Cable fault
locator, Cable route tracer, Relay contact testing/cleaning kit, etc. should be
used in the testing of electrical signalling circuits. Calibration of these
instruments should be checked periodically.

19.8.4 Physical Inspection of the Installation
It shall be checked that the work has been carried out in accordance with the
approved plans and that equipment is of proper type and is in good condition.

The following aspects shall also be checked during site inspections:

(a) The signals, location boxes and other out-door equipment are as per
approved plans and are in good condition. Arrangements for proper
ventilation, where provided, are not choked.

(b) Each location contains all the apparatus required as per approved plans,
the apparatus is of approved type and that the power supply equipment,
batteries, fuses, etc. are installed according to the approved plan and
specification.

(c) The location of insulation joint, jumper wiring, traction bonding in electrified
areas, point machines, switch locks and other apparatus is as per
approved plans and their condition is satisfactory.

(d) The electrolyte, inter-connections between cells, cell voltage etc. are in
required condition as per relevant specifications or instructions.

(e) Each wire is tagged or marked where feasible so that it can be identified at
each end and the nomenclature on the tag corresponds to that on the
wiring diagram. The tags or other sleeves of identification shall be of
insulating material.

(f) The number of wires terminated on each terminal or relay terminal boards
or other devices are counted and tallied with the number of wires shown in
the wiring diagrams.

(g) All connections on terminals and binding posts are properly secured.

(h) The lightning arrestors are properly connected and earthed as per plan.

Chapter 19: Installation, Testing & Maintenance of Signalling Equipment Page 398 of 535