Supply delivery and installation of voltage corrector device with allied electrical works at Joypur Ph-I water supply scheme Block-Hanskhali, Dist.-Nadia.

Amount

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 P.H.E. Dte.)

Input Voltage:- 3 phase, Main supply may or may not be balanced with respect to Phase to Phase- 225V-500V Phase to Neutral-130V-290V

Output voltage:-3 phase balanced output voltage. Phase to Phase- 400Vor 415V± 1%, Phase to Neutral- 230V-240V ± 1% (Provision should be made to adjust the Variation of output voltage per phase by a variable pot oil within ± 5% of output).

Line regulation:- Out put voltage should remain well with ±1% of set voltage (From Minimum to Maximum i.e. either 400V. or 415V. supply variation).

Load regulation : Output voltage should remain neutral well within ±1% of set voltage be ( From no load to full load ) i.e. either 400V. or 415V

Correction speed:- Better than 35 Volt / Second

Efficiency:- Better than 95% on full load.

Cut off limit (minimum &maximum ) by limit switch with Audio & Visual

Lamp Indication :- For Input & Output should be provided. ( 3 lamps per side)

MCB Protection: For Input side.

Load protection : HRC Fuse on each output phase should be available

Output over shoot:- Beyond 210V to . 255V /phase in case of “ MANUAL MODE” & voltage protection :AUTO MODE” operation.

VISUAL Indication for under voltage & over voltage of output

Manual Mode:- Up & Down correction with O / P voltage over shoot protection. Beyond 210 V-255 V. per phase.

Nature of cooling:- Oil cooled system

Electric current over load protection

Circuit for delay output

Input high voltage cut-off above 500 V.

Mode of Operation:- AUTO/MANUAL with a provision to restore the normal working of the unit “STANDBY OPERATION” should be available in case of any Electronic failure in auto mode

Auto Mode:- Normal * Standby.( Manufacturing test certificate should be Provided at the time of delivery).

Supply and delivery of following materials at site:

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

100 Amp. Re-wireable type TPN main switch (Make: Approve make of P.H.E. Dte.)

100 Amp. 4 way Copper busbar chamber box by 16 SWG sheet steel enclosure including porcelain Chair etc. with painting complete as per direction of the EIC. (Approved make)

25 sqmm. 4 core PVC insulated 1.1KV, AI., Ar. cable(Make: Approve make of P.H.E. Dte.).

Making brick built foundation with supplying of all required materials suitable for the above Voltage stabilizer by (4:1) cement mortar including holding down foundation bolts(If required) and plaster with neat cement finish as per direction of E.I.C.

Fitting, Fixing and connection of above supplied changeover switch, bus-bar and Main Switch as in item no 2.01 to 2.03 on the wall by supplying all necessary materials to complete the job.

Installation of the above voltage stabilizer of item no. 1 on the foundation including all connection complete as per direction of E.I.C.

Drawing and connection of cable on wall as in item no. 2.04 and all connection complete with all equipment as per requirement and as per direction.

Making joints of the cable by supplying compression type gland thimple, socket etc.as per requirement and as per direction of EIC.

Double earthing the whole installation complying with IE rule including supplying of all necessary earthing materials to complete the job as per direction of EIC.(inside P/H)

Add GST @ 18%

Add LWC @ 1%

KUNDU ELECTRICAL ENTERPRISE (BID ID -6836581)

KARTICK BAL (BID ID -6853286)