standards / manuals / guidelines for small hydro development - AHEC

- Drainage pump & Dewatering pumps- Governor compressor- General purpose compress- Ejector system for top cover drains- Cooling water strainers‣ Check sealing water pressure & air seal pressure‣ Check running and vibration of machine and ensure nothing is abnormal‣ Check working of top cover drainage system‣ Check water, oil and air flow indicators‣ Check physical appearance of various system such as man holes, valves,indicators etc.‣ Check G.V. Servomotor stroke & R.B. angle is normal‣ Check general house keeping is in order and all panels, mountings on wall areclean and in order.(ii)Generator, AVR & Excitation System‣ Watch running and vibration of machine and ensure nothing is abnormal.‣ Check for any sparking from the brush of slip ring.‣ Check temperatures of winding & core. Ensure that these are with in limit.‣ Check that all instruments and indicators mounted on unit control board,governor panel, AVR & excitation panel are in OK condition.‣ Check all indication lamps are glowing.‣ Check with test push button that all fault indication lamps are OK.‣ Physical check of all sub distribution boards installed in P.S.‣ Check all inlet exhaust fans are working.‣ Check all batteries are physically in good condition.‣ Check battery chargers are in normal working conditions.‣ Check for any abnormality, sound, chattering in bus duct, generator barrel,neutral cubicle.‣ Check all AC supply boards installed in Power House are okey.‣ Check air conditioning plant is working satisfactorily.(iii)Control room‣ Check that all parameters indicated on various panel are matching.‣ Check all indicating lamps are glowing. Also check annunciations are OK.‣ Check movement of all pointers & reset them.‣ Check all instruments mounted on panels are in working order.‣ Check all facias & relays are reset.‣ Check rear of all panels and mounting on this side for OK condition.‣ Check emergency lighting system is OK.‣ Check position of circuit breakers for out going lines.‣ Check grid voltage & frequency.(iv)L.T. room‣ Check all indication lamps are glowing.‣ Have general look on instruments and relays mounted on board.‣ Check various switches are in correct position.AHEC/MNRE/SHP Standards/ E&M Works – Guidelines for Operation and Maintenance of Small Hydropower Station 8