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(.Enclosure with Double door & DOtAble Compartment forL.T.C.T Three Phase Meter. (~O~ -fa!' ;0, Mc.tc.t"i"Ci\)

I. Th~ Box shall be made by DEEP drawn process. The base and cover of the box ~haU beindividually in one piece without any welding except for fixing of the acoenoncs likehinges, clamps, handles etC, which sMll be sfAlt-welded. The Box I cover shaD bI! drawnfrom 16 SWG CRCA M.S. Sheet and sizes sha11 be Il. mentioned in drawU1&S auached.

The Box shall be drlWll by using CRCA sheet steel metal thickness not less that 16 SWO.A partition shaJJ be Drovided !ruide the base IUch that box is divided in two plirls as shown

in the drawing. Bo~ shall DC provided with two &cpaBte cover's. Three bl>1es with tub~r

glands of lov. IS Sli. mal ahaIl be .provided in the partition sheet e~a11 be as shown 1ndrawing •.

2. Each 'CQver of Box shaU be fIXed on two - w..per ploof inside hinges not visible fromouts~ Hiuga shall be made of ] 6 SWO M.S. sheet and mall be 40 mm in Ir.ngth. The

door of Box sJiaJl'9p<?1 from rizht to )eft by 90°. Collar of the cad1 door (C<iver) illdosedposition fl,aU feSt .on· the collar of the bo1y (basc) of Box. The Cl)llar of the door sOOIJoverlap du:i ex>llar of the body of Box by 8mm. The c~l1ar of the body shall be pro~i~ed

_with t:ooquaIity rubber gasket lining of 4-rom thickness. Thicknes.~ of rubber lm~shall be such !hat it provides ~iOpcr seaiing betw~ the cOver & base of Box to avold

penctrBtion of d~' &: ingress of water. Degree of Prolec'':.:>n shall be Ii> 5 I. Rubber

!jriing~ld be cd with slIitlblt' adhesive $) tha: the same doCS not get removed t.yitself on openln 0; the door. One numVa' 'Ut shaped latch arrangement shall beprovided to both mpartments to locklScaJ tbe (;Over wi~ base I'S shown In dtawing.2mm dlametcr hQ C nhall be provided on U-sha.pcd 1a1ch (or sca1ing wir:s and additionalbolo of. 8 mm·sb/lU be rrovidej In ~'e' IAtcl1 for locks. AU bole." should be aligned when

Jatcl1 is in ~Io.~,ed~on.'. f '

3. A viewing windo~~opcniog I\S indica'ed in the drawing sball be provided about 40mmbelow tol?·~gc of Cava to fac:llltato taking ~f meter readings. Viewing window shall beprovided with toughened glass of 100 x 150 x 5mm thlclo1es~. Glass s.'tall have scl1l1ch

prooflo~o on the ri~t side top corner of the glass. Thill glass 5",,11 be fixed from inside of1hc cover of Box. wl/h slng2e plecc metal frame (Olass Holder) fIXed with roin fourSCl"CWI. The glass has to be ·fittcO with a wrap around single pleo: robber ring witholttjointmad(! ~ good quwty iubber 80 that It can y,ilb :tand wca1her effect.

4. The mountWg arrangement of the- locter &. C.T.s shall be as shown in the dI1lwing. It

sbc,>u1dbeRlscd front the base of Box body by ~Omm.C.T. mounting plates fIXed with 2screws' shall be provided as shown in the drawing. for m",unting of meter, the suppliershaU.\lPPly three mounting MS s.~ olle for upper (M4 threads X length 12uun) and

m-0 s~:Orft threw X 3Smm len~ with nut) In moving sJotted flat. SeuU>~ of M5S . Slr\l'I'\:~o:e~j~:Y\ut.sh~llbe. f'l'tl""de.ol it\,slo+of CoT 1w\C1\>n+in-, pb-tec;.

. For lOQunMg the Box on pole four strips of L-shape'shall be welded on the box as shown, in dzawing. Strips shell be 40mrn wide &: 3mm thick.

6. 4. Nos. 'holes with rupcriorqual~ robber cable "'landsofintemal djamete~ 'Omm eachfor in .. d nJ. b •.commc an outgoing cables shall b., provided at l-oth thc sidewalls of the box for

passing ofeable through C.T.s. Rubber glands shall be fixed with suitable adhesive l>O thatthe same docs not get l'mlovccl. RulJbcr glands shall be made su.:h 1bat Internal diameter ofglands should be closed with the rubber film ofa~xfmatcJy 3ri1m ihlekncs$. Cable willgf) through tbc cable glands by cutting the rubber tilm oithe glands.

7. Four primary cable cOMocton of Aluminium shall be provided with the box. Primarycable coml~rs shal! ~ used fl)!' tappiog main cable and providin& primary wires forvoltage supply of the meter. Eacb cable c:onnectorahaJl consist of two aluminium strips ofsize IOmm x SSmm. Both strips will have holes at the ends to clamp with cable by ~ercwsand DUtsas shown in drawillg. The supplier shall supply four sets of cable connectors with.

4mm2 cable crimped with suitable lugs at both ends completo with screws ~d outs.

8. 'l11e enclosure shall comply with the requirement of IP-S3type as per 18-13947 or thelatest version thel'COf.The boxes' Wli be Vermin proof, dust proof, moisture proof. waterproof and suitable for outdoor instaJI:tio11.

9. The surface of the' Box shaU be properly pre-treatodJPhosph.:1ted in 7-Tank process andsball be applied with A powder ooating of -4()"m1cron tMcknC!SSou oukr side and inside ..Powder coating shall be (If light grey colour. Powder coating shall be Heather p:'oof &.co~slon r~l<1anl and suitable for outdoor usage..

J O. Necessary, fixing llIt'lU18cmcnt shxll be jXOVidcdas shown In the drawing .

. II. HanJles shaJl be provided 10 the doql"3 to open and clos.: the doo~.

12. Two Earthing Bolt ofs~.2S x Saum welded with the box from inside, shall be pro ••.:ci~for extemaJ C&rtbln~ with 2plaln washer, one spring. wlI$hcr & two nuts. Earthing bo:tshall havc no layer ofpowdcr coating and shaU be propecfj' :zinc plated.

13. A II the screws and washers shallllC properly zinc plated.

14. The tolenncc Permissible 011. the .-wcrall dimensions of the Box shall be (+/.) 20/•.However, the Iolerance for the tittiugs shall be (+1-) 3%.

IS. Tests:

Acceptance Tc:sts:

I) Overall Dimension Test.2) Powder Coaling thicknes.~

TvDe Test:

IP53

16. DRAWINGS:

,'r The sUc<:cssful bidders have 10 suPPly the complete matcril\! as per ~/S dra,\\ingenclosed.

]~, PACKI:'iG:

The box shall be suitably paL~ked in 3 ply coffilgated boxe, in Llrder w aVLlid dmnage illIT<U1Sit.h'Uldlillg. SIL)l'age ,md funh.:!' lfallSpL1I1miL)!l th)1!l Shlre IL)Held.

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17. All tests and inspection sbaJllx: made at the piace ofmanufa..."turer. The manufacturer sh<t1J

provide the purchaser all reasonable raciJities without charge to satisfy him that themata-ia1 is being sUFPlied in accordance witt: this specification,

18. JNSPECnON:

All tests and inspection shall be made at the place of manufactur~r. The manufacturer shallprovided the purchaser aJl reasonable facilities without charge to sr.fufy him that thematerial is being supplied In accordance with this specification.

19. REJECTION:

TIle ChIef Engineer ( M M )ofthc~, at hi~discretion, may select on~ comple1emetering box 4' random from a lot of eacli type or part thereof as may be supplied fromtime to time. The metering box ~t't selected must pass any or all the tests mentioned ubove,othen:;ise the whole 101 of metc>:ing bolCe~ or part thereof from which one box ~asselected, will be rejected.

The testing under this clause will be done in any Labora'((\ryof the ~I,,,l s choiceincluding Nt......'s Laborot()ry. Notice of such tests will be g:ven by the~by ordinaryI'oOst to supplier and the date of test may not be altered to the convenience or request ofthe supplier. The supplier is at liberty to be present dui.ng testing.

" 20. Submlrslon of Sample:

The sample ofl:oxes as per spedfication shall be submitted along with tCllder.

21. SCHEDULES:

2~. The tenderer shall be in the following schedules which from part of the tenderspeC~flcatiOll and offer. If the schedules are not submitted duly filled in with 111eoffer, theoffer shalll:e liahle for rejection.

Schedule 'B' ­Schedule 'C' ­Schedule tD' _Schedule tE' _

Schedule of Deviation

Tendere~"s Experience.Scnedule of deviation from specified 5tandarrls.Deviation from specified test rtXjuiremcnts.

23. AU deviations from the specification shall be brough~ out in the schedules of deviation(Schedules 'D','O' & 'E'). The discrepandes between the specification and thecatalogs/Literaturcs and indicative drawing5 which are subj~t to change, submiued, aspart of the offer shell not be considered and representation in this regard shall not beentertained.

24, The deviation brought out in the schedule sholl be supported by authentic documentsstandards an~ clarification otherwise the offer mal be liable for rejection,

25. The tenderer shall submit the list of orders fIJr ~imilar type of equipments executed orunder exocution during the last t.hree years, with full details in the schedule of Tenderer'sexperience (Schedule 'C') co enable the purchaser tl.> e"aluate the lender.

6' & Design

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1 j}~~vNLIR/Ol/05

LT CT METERING BOX (DEEP DRA~N TYPE)f:""OR DTe METERING

. DIMENSIONS ARE IN 1-11-1

(REVISED)

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00l

TOUGHENED GLASS 10Dx150xSMM

~ !~~NSIDt: HINGES

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IR/Ol/05

L DIMENSIONS ARE IN HM1(REVISED)

LT CT METERING BOX (DEEP DRAW~ TYPE)FOR DTe METERING

o

CABLE CONDUCTOR

SCREVS/NU"iS

SCREW LUG FOR PRIMARY'WIRE TO METER

7-