Tender For providing and fitting of essential items and allied material for snow clearance operation at nathatop sanasar road - supply, testing and commissioning of 48v smps float cum boost automotive battery charger with moveable trolley stand for snow operation at nathatop - sanasar roadgeneral technical requirements for battery charger suitable for 48v vrla type battery1.) type -float & float cum boost charger for vrla type, full wave, full controlled type. 2. ) ratings- 15 a float cum boost for 48v, 150 ah vrla type battery 3. ) ac input- i) voltage 415 vac 10%ii) frequency 50hz 5% iii) phase 3 - phase 4.) d.c.output voltage settings -nominal float fc 48/54.5v (adj. by + 20%, - 5% bc 48/66.5v (adj. by + 2%, - 5%) 5.) output current limit 15a 15a 6. ) power conversion ac to dc by means of three phase full wave, half controlled bridge rectifier consisting of thyristors and diodes. 7.) voltage regulation at bridge output. + 1% of set value for + 10% input voltage variations, 0-100% load variation. 8. ripple voltage less than 3% rms without battery connected. 9. efficiency more than 80% at full load 10. protections (a) input side ac input mccb & elbs with input on/off switch and fuses, contactor (b) output side dc output mccb with output on/off switch and fuses. (c) protection current limit protection, soft start feature, surge suppressor. fast semiconductor fuses for rectifier bridge. (d) control circuit fuses (e) capacitor circuit rectifier hrc fuses. (f) over-voltage cut-back (g) charger over load / short circuit (h) blocking diode 11. controls and switches followings controls and switches are provided in the system 1 ac input source mccbs with interlocking 2 dc output mccb 3 auto/manual float/boost mode selector switch. 4 float and boost voltage variable potentiometers. 5 manual voltage adjustment potentiometer 6 test push button 7 reset push button 8 battery current adjustment potentiometers 9 heater s power supply switch 12. features the following features are provided in the systems: 10 soft start on dc side 11 class-f insulation for all magnetic 12 automatic voltage regulation. 13 automatic changeover from float to boost and vice versa based on current, drawn by battery. 14 filter circuit to eliminate ripple. 15 charger current limit 16 separate battery path current limit. 17 built-in auto phase reversal of operation. 13. meters f.c. b.c. (i)input voltmeter (i) common (ii) input ammeter (ii) input ammeter (iii) output voltmeter (iii) output voltmeter (iv) output ammeter (iv) output ammeter. battery volt meter battery ammeter earth leakage ammeter 14. indications phase on lamps (ii) output on lamp a)phase on lamps (ii) output on lamp. (iii) charger on float led (iv)charger on boost led. 15. annunciation with audiovisual alarms. (i) ac input mains failure (ii) input phase failure (iii) ac under voltage iv) input phase failure v) rectifier fuse failure vi) output fuse failure vii) filter fuse failure viii) dc under voltage ix) dc over voltage x) charger trip xi) capacitor fuse fail xii) output mccb tripped xiii) charger over load xiv) earth leakage xv) dc earth fault xvi) alarm supply fuse failure xvii)battery low condition. v) rectifier fuse failure vi) output fuse failure vii) filter fuse failure viii) dc under voltage ix) dc over voltage x) charger trip xi) capacitor fuse fail xii) output mccb tripped. note : all the alarms shall be provided through electronic display cards. audio alarm through buzzer, visual indication through 10 mm leds & alarm ackn. / reset and led provision is through push buttons. 16. operating ambient temperature surrounding the panel 00 to 500 c 17. surrounding the panel relative humidity. 0-95% non-condensing 18. panel (i) protective grade (ii) cooling (iii)paint ip 42 natural air-cooled smoke grey of iss-692 shade a) average winding temperature rise over ambient temperature b) insulation class c) insulation breakdown voltage. as per relevant iss. f 3 kv for 1 min withstand. 19. cables 1100 v
Tender For providing renovation with addition and alteration in compound lighting with galvanised octagonal pole, highmast with streetlightfittings and required electrical installation due to civil renovation work in the premises of iti mankhurd, balkalyan n
Tender For corrigendum : supply of 415v, utilization category ac23a, 630a local isolator cabinet in sheet steel enclosure complete with 630a, 3 pole load break switch. 2. shall be with side operated handle, padlocking facility, prebreak micro switch having 1no+1nc contact. 3. micro switch contacts shall be wired to 4 sq mm tb for external termination. 4. provision of padlock system having sufficient space to lock the isolator at off position by minimum two agencies at a time. 5. complete with both power & control circuit wiring with all insulators, bus bars and control terminal blocks. 6. detachable bottom gland plate for entry of cables from bottom. 7. front door shall be hinged and inter-locked with the isolator in 'on' position. the front door should have a minimum 3 mm thickness perspex/triplex window for observation of position of contacts. 8. isolator should confirm to iec 60364 standard. 9. the dimensional drawing of the local isolator cabinet or product catalogue showing mounting arrangement of the components should be enclosed along with the offer. 10. isolator cabinet should be provided with rain canopy. 11. any isolator parts should not be made of aluminium/aluminium alloy. 12. isolator cabinet shall be metal enclosed suitable for wall fixing using 4 welded fixations, dust and vermin proof and shall be provided with degree of protection as ip-55. 13. provision for three distinct parallel busbar per phase for termination of three nos of 240 sqmm aluminum cables for incoming and two distinct busbar per phase for termination of 120 sqmm copper cable. 14. all hardware used in isolator cabinet shall be corrosion resistant. 15. minimum clearance between the live parts and detachable bottom cable gland plate shall be 400mm. 16. cabinet should be painted with alkaline resistant epoxy paint. 17. isolator cabinet shall have provision for earthing at two separate and distinct points. 18. each isolator cabinet should be supplied with panel keys., push button station specification: 1. pbs made of 2mm sheet steel enclosure with rain canopy, protection: ip-65. 2. 01 no. of green colour start pb with 1no+1nc contacts, 01 no. of red colour stop pb with 1no+1nc contacts, 01 no.of increase pb with 1no+1nc contacts <(>&<)> 01 no.of decrease pb with 1no+1nc contacts. one emergency stop push button with 1no+1nc contacts (push to lock type) shall be provided. size of each push button is of 22.5mm diameter. inscription plate for all push buttons. 3. pb shall be wired with 2.5 sq.mm. copper wire to 40 nos. serially numbered terminal blocks (tb) of elmex make having tb-5-6, 7-8, 11-12, 13-14 <(>&<)> 17-18 shorting link. 4. two nos. of cut out of size 72x72 mm for ammeter and rpm meter shall be provided. 5. 'on','off' <(>&<)> 'trip' indication led lamps in red, green <(>&<)> amber colour respectively with inscription plate to be provided. 6. all push buttons, elements, led lamps <(>&<)> cutout for ammeter <(>&<)> rpm meter shall be on the hinged door of the pb station. 7. pb station shall be weather proof, neoprene rubber gasket suitable for outdoor application. 8. 2nos. of earthing studs to be provided. 9. left side hinged door shall be provided with flexible braided copper earthing. 10. pbs shall have 04 nos. of corrosion free bracket suitable to fix on vertical surface. 11. detachable gland plate to be provided. 12. the push button shall be painted with one coat of red oxide primer <(>&<)> two coats of zinc chromate primer and finally finished with stoving enamel grey paint. 13. the push button station shall be generally in line of enclosed drawing (fig-2). 14. party to submit the drawing along with the offer for technical scrutiny.
Tender For tender for supply of taking down of lightfittings of any type size and model complete all as specified and directed. , taking down of brackets of any type size and model complete all as specified and directed. , m& l in repair steel tubular swaged poles complete with cast iron base plate , finial taper plug , bolts , nuts & screws as specified type 410 sp 22 (8.5 metres long) complete all as specified & directed. , m& l in repair steel tubular swaged poles complete with cast iron base plate , finial taper plug , bolts , nuts & screws as specified type 410 sp 31 (9 metres long) complete all as specified & directed. , re fixing of led streetlightfittings of any wattage outdoor type complete all as specified and directed. , supply and fixing in repair led streetlight fitting 120 watt 230 v ac outdoor type with high pressure die cast aluminum hosing and heat resistant complete with driver , lamp bracket with impact and corrosion resistant including thermal management in multiple optics , efficacy 110/120 lpw , complete with ip 65/66 protection complete all as specified and directed. , supply and fixing in repair led flood light 80 watt 230 v ac outdoor type with thermal management in multiple optics and equipped with ip66 protection , with impact and corrosion resistant complete with driver and lamp , efficacy 110/120 lpw , including clamp , nut , bolts etc.complete all as specified and directed.make. crompton , cat no.lfl 80 cdl/60 hpm , supply and fixing in repair led flood light 150 watt 230 v ac outdoor type with thermal management in multiple optics and equipped with ip66 protection , with impact and corrosion resistant complete with driver and lamp , efficacy 110/120 lpw , including clamp , nut , bolts etc.complete all as specified and directed.make. crompton , cat no.lfln 150 cdl/60 m , s&f cable junction box 155x210x92 mm in size , made out of thermoplastic , having ip 66 protection for outdoor installation fixed with 4 way bakelite cable terminals including 03 nos polymide gland with check nut (m 32 02 no & m 25 01 no) fixed on poles with aluminium clamps of size 25x3mm , nuts , bolts , washers etc. including taking out of old unserviceable cable junction box complete all as specified and as directed. make. cat no. dk 1616g of hensel or equivalent model , supply and passing through steel tubler pole/service connection , 1100 volts grade multicore , fr , round insulated copper conductor and sheathed flexible cable , multistranded , three core of nominal cross sectonal area 1.5 sq mm , for connection of security light from junction box through pole /conduit with all terminals complete all as specified and as directed. , s and f single arm bracket made of40mm dia 1.0mtrs long for security light , with mounting ms clamp of flat iron size 25x5mm of suitable length 02 pairs including nut bolt etc of suitable size and painting to ms clamp with two coats of aluminium paints over a coat of red oxide netal primer all as specified and directed by engr in charge. , s & f in repair rigid non metallic pvc conduit of dia 20 mm exclusive of boxes (junction/terminal) but inclusive of all tees , bends , elbows , reducers , bell mouth tube ends and fixing accessories such as couplers , lock nuts , saddles , pipe hooks , clamps etc. all as specified and directed by engr in charge. , m and l for earthing complete with ms galvanised plate of size 60cmx60cmx6mm as earth electrode buried directly in ground earth pit not less tan 2.25mtrs deep below ground level with top edge of the plate not less tan 1.5mtrs below normal ground level connected to galvaniosed iron strip 32x6mm as earthing lead by means of bolts nut check nut and washers of galvanised iron welding or steel all as shown in electrical plate no 3 in ssr part i of 2009 connected to earthing test point all as specified complete with exevation and earth work pcc pit with 6mm thick ci ms cover having suitable handle 10mm ms rod with frame and locki