supply installation testing and commissioning of submersible pumping equipment at wss nagdandi.-supply, installation, testing & commissioning ofopen well pumping units as per is 14220 at filter water stage. pump: - discharge=8000gphhead= 90 metersefficiency = not less than 50% speed = 2900 rpm type of pump = mixed flow. type of fluid to be handled = clear water type of pump:open well verticalsubmersible pumpdual mechanical seals ( 01 no ) and bearings ( 02 no ) for each pumping unit must be provided as spare parts.material of construction: impeller = stainless steel pump shaft = stainless steel ss 410. pump casing = cast iron / stainless steel impeller: impeller is of the enclosed or semi – enclosed type and properly balanced.enclosed impellers equipped with seal rings on their hubs. coupling: a suitable coupling arrangement provided with pump set. non-return valve: - non return valve of the suitable size provided above the pump discharge case. motor:rating : as per oemmethod of starting = star – delta / speed = 3000 ( sync ) . frequency = 50 ± 3 % hz working voltage = 380-415 ± 15% v, 03 phase efficiency = not less than 90%class of insulation = f / suitable for above parameterssubmersible motor should be water filled water lubricated squirrel cage type having capacity for above pumping parameters and working on 3 phases; ac supply ranging from 380 to 415 volts, 50hz. the motor should be sealed by radial rings to avoid mixing of well water with motor filled water. a ) , providing, fitting, testing and commissioning of 30kvamanually operated voltage stabilizer as perspecifications below:rating = 30kvatype of voltage controller: manually operated copper wound, 3-phase, ac power supply multi step.type of regulator: double plate type with electrolytic copper contacts.input voltage : 250-400 volts. ( 3 phase ) output voltage: 400 ±10% volts.frequency: 50 ±3 c / s.windings : electrolytic grade copper of adequate section, vacuumimpregnated and oven-dried.insulation: fiber glass insulations to tested parameters.cooling : naturally, oil cooledtemp. rise ( max ) : 30°c above ambientmounting: on uni-directional wheels.correction rate : 30 volts per stepduty cycle : 100% continuous.enclosure : ms sheet enclosure in pressed cgr sheet powder coatedwith radiators.core laminates : high grade, low eddy loss, grain oriented silicon steellaminations.load : three phase induction motor load.load amperes ( continuous ) overload in 24-hours operation: 10% above continuous ampere rating.the voltage stabilizer shall have t-oil level indicator gauge preferably glass type tube or otherwise visible to naked eye. the top of the container to have a display panel for housing 02 numbers digital voltmeters ( 0-500v ) along with 4-way selector switch and set of neon indicators for incoming and outgoing phases ( 06 no’s ) . insulating media ( t. oil ) of 11 kva grade to be provided and filled up to top level, with dielectric strength of 5 kv at 4m air gap. the t-oil of specific grade should be provided in separate barrels and filled at site up to top level. the voltage stabilizer shall be accepted with manufacturers dully stamped test certificate and shall have name plate with specifications.,