NIT NO. 13. ITEM NO.03 (2022-23)

Air circuit breaker 1250Amp. 3pole 50ka MDO 415V Microprocessor Make: L&T/Siemens

Air circuit breaker 630Amp. 3pole 50ka MDO 415V Microprocessor Make: L&T/Siemens

MCCB 415V, TP 3phase 50KA 50Hz,200Amp with spreader & handle Make L&T/Siemens

MCB Single pole 6Amp. Make L&T/Siemens

MCB Four pole 63Amp. Make L&T/Siemens

Protection relays having sensitive earth fault ,over current ,S/C protection with following features-High set elements, highly immune to harmonics, both 1A & 5A CT input in one relay,6out put contacts, Non-volatile memory for trip indication, self-monitoring facility, status indication LED display & sealable front cover to prevent unauthorized access Make: L&T/DJB approved

Digital Amp. Meter. -Make AE/L&T

Digital Volt Meter0-500V -Make AE/L&T

Indicating lights LED type RYB & On/off Make : L&T /Siemens

Current Transformer1250/5 Make AE /Saviour

Current Transformer200/5400/5 600/5Make AE /Saviour

Fabrication of panel sheet steel enclosure suitable for fixing of above switchgears i.e 9Nos. outgoing feeders & 2Nos. incoming feeders, 1No. Bus Coupler in cubicles all metering section, relay section will be covered symmetrical as per site requirement made out of 2mm CRCA sheet totally enclosed, powder coated free standing, floor mounted type, dust& vermin proof, outward opening, lockable doors having hidden hinges and a bolted back cover both using non-deteriorating neoprene rubber gaskets to provide protection .The each part of the fabricated panel will be strictly subjected to seven tank treatment. The various components, assemblies and sub equipment’s of the panel will be as per standard given in relevant IS.

Bus bar Aluminum of electrolytic grade conductivity covered with heat shrinkable PVC sleeve throughout in red, yellow & blue color to identify three phases & black for neutral current carrying capacity 600Amp. For outgoing motor feeders .The bus-bar support insulator made of non-deteriorating, vermin proof, non-hygroscopic materials such as SMC/DMC.

Bus bar Aluminum of electrolytic grade conductivity covered with heat shrinkable PVC sleeve throughout in red, yellow & blue color to identify three phases & black for neutral current carrying capacity 1200Amp. For incoming from transformer-2nos. & bus coupler inters section The bus-bar support insulator made of non-deteriorating, vermin proof, non-hygroscopic materials such as SMC/DMC.

Fixing of all above accessories such as ACB -8Nos, MCCB (4Nos. of various ratings), Amp./volt meter indicating light and bus bar etc. in the panel enclosures, making connection with bus bar . Complete control wiring in 1.5sq mm copper wire, ferrule, thimble etc. Fitting of the Air circuit breaker & racking system in panel enclosure complete with auxiliary contacts N O+NC with under voltage trip unit complete with wiring. Fixing of the O/C E/F relay complete with wiring and setting of protections parameters as per site requirements

Dismantling of old system & allied accessories, MS sheets, enclosures etc. & shifting the same

Installation of the panel at site, matching of bus bars, links, bends, termination of cable both incoming & out going side through cable gland & thimble

loading, unloading by crane & heavy labour & cartage up to site

Testing & commissioning of panel & allied accessories as per required parameters with relevant IS. Testing of the panel prior to switching on as follow I. Continuity and earth testing II. Meggaring of all equipment for phase to phase, neutral to body, neutral to earth and phase to earth. III. checking for all tightness of nut and bolts IV. AlIignments of doors etc. V. Interlocking tests. VI. All function tests VII. Testing on load with engineer in charge

Premier Engineering Company

CHANDERA BUILDERS

HARI ELECTRICAL CO.

Raj Engineering Co.

Super System Engineers