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Section 9: Maintenance of Power Supply  Equipment

                16.9.1  (a) Change-over  panel  in  ASM  office  shall  be  kept  in  good  working  condition.
                            Defects,  if  any,  shall  be  advised  to  Electrical  Department  for  prompt
                            rectification.

                        (b) The working of power supply modules like DC-DC converters, voltage regulator
                            transformer,  battery  charger  rectifier,  inverters  etc.,  provided  in  power
                            equipment room shall be checked including proper working of switches, fuses,
                            MCBs, SPDs, terminals, meters etc. during scheduled maintenance. Units shall
                            be switched from active to standby as per local instructions.


                        (c) The  power  equipment  shall  be  cleaned  by  blower  or  any  other  suitable
                            device to remove dust etc.

                        (d) The wiring shall be checked to ensure that wires are in good condition and
                            connections are properly tightened.

                        (e) Record  of  voltages  and  load  current  of  all  power  equipments  shall  be
                            maintained  on  the  prescribed  format.  Remedial  action  shall  be  taken  in
                            case any abnormality is observed.

                        (f)  Insulation of transformers shall be meggered at 500 V annually.


                                          Section 10: Maintenance  of  DG set

                16.10.1 (a) Fuel tank shall be cleaned periodically. Fuel shall be filled through a wire gauge
                            filter which shall form part of fuel tank. Before filling up, unused fuel shall be
                            decanted/replaced if the DG set has been idle for a considerable time.


                        (b) Lubricating oil shall be periodically checked and proper level maintained.

                        (c) The maintenance of DG set shall be undertaken by qualified and trained
                            mechanics.  During  testing  of  DG  set,  the  maintenance  staff  shall  wear
                            rubber hand gloves and take necessary safety precautions.

                        (d) After  specified  hours  of  run  prescribed  by  the  manufacturer,  the  diesel
                            generator  sets  shall  be  overhauled  by  OEM  or  his  authorised
                            representative or by designated railway staff.

                        (e) Leakage  of  fuel  oil,  lubricating  oil  and  radiator  water  shall  be  effectively
                            checked.

                        (f)  Radiator fan shaft shall be grease lubricated and worn out shafts replaced.
                            Radiator hose and fuel oil hose shall be checked for leakage and replaced
                            in time.


                        (g) Automatic starting device, where provided, shall be tested periodically for
                            effective starting during power failures and low voltage condition.



                                      Chapter 16: Power Supply Systems for Signalling Installations   Page 329 of 535
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