Public Health Engineering Department Tender

Supply and delivery at site of 20KVA, 3phase, oil cooled type Servo Motor operated copper wound line voltage corrector conforming to IS-9815 (Pt.-1)1994 suitable for un-balanced input voltage with following specification including first filling oil as per IS-335 where applicable. (Make : Approve make of PHE Dte.) A) Input Voltage : 3 phase Main supply may or may not be balanced with respect to phase to phase 200V-500V and phase to neutral 144V-290V. B) Output Voltage : 3 phase balanced output phase to phase 400V or 415V± 1% phase to neutral 230V or 240V ± 1% (Provision should be made to adjust the variation of output voltage per phase by a variable pot well within ± 5% of output) C) Line Regulation: Output voltage should remain well within ± 1% of set voltage (from Min. to Max. i.e. either 400V or 415V supply variation). D) Local Regulation : Output voltage should remain neutral well ± 1% of set voltage be (From no load to full load) i.e. either 400V or 415V. E) Correction Speed: Better than 35 Voltes - Second. F) Efficiency : Better than 95% on full load. G) Cut off limit for (Minimum & Maximum) by limit switch with Audio and Visual. H) Metering indication: By selector switch provision should be made available to measure input mains supply be made voltage other stabilizer for load current measurement an Ammeter with selector switch should be available. I) Lamp indication: For input and output should be provided (3 Lamp per side) J) M.C.C.B. Protection: For input side.. K) Load protection : MCB/MCCB L) Output over shoot: Beyond 210V. 255 Volt/phase incase of "MANUAL MODE" and voltage Protection "AUTO MODE' operation. M) VISUAL indication for under voltage over voltage of output. N) Manual Mode: Up & Down correction with O/P Voltage over shoot protection beyond 210V-255 volts. Per phase.. O) Nature of cooling Oil cooled system. P) Electric Current Over Load Protection Q) Circuit for delay output R) Input High Voltage Cut-off above 500 volt. S) Mode of operation:-Auto manual with a provision to restore the normal working of the unit '' standby operation'' should be available incase of any Electronic Failure auto-mode T) Auto Mode:- Normal & Standby (Manufacturing Test Certificate should be provided at the time of delivery.)

Supply and delivery of following materials at site :-

100 Amp. 4 pole on load change over switch (Make: Approve make of P.H.E. Dte.)