Corrigendum - Replacement Of Old Vintage Ht Four Pole Structure With Rmu Inside Ins Virbahu And Provision Of Deficient Power Supply For Mi Room P 57 At Ins Satavahana And Building No P 12 At Naval Base Under Age Em I Of Ge Utility 1 Visakhapatnam , Dismantling Old Defective Four Pole Structure Complete Including Steel Poles , Cross Arms Etc Complete And Removing From Site Complete All As Directed , Supply , Installation , Testing & Commissioning Of 11 Kv , 630A , 21Ka/3Sec , Outdoor Type , Both Sides Extensible , Internal Arc 21Ka For 1 Sec For Tank , Floor Mounted With Internal Copper Bus Bars , Sf6 Insulated , Completely Motorised , 6 Way Rmu Consisting Of 2 Nos Lbs As Incomer & 4 Nos 630A Vcbs As Outgoing With Sacada Compatable Overload And Eart Fault Protection Relay ( Ashidha / Cspdr ) With Air Insulated Metering Module ( Mfm For Vcb Feeders ) . All Live Parts , Bus Bars , Lbss Connections Of Rmu Shall Be Enclosed In One Sf6 Tank To Avoid Multiple Interconnections . Sf6 Tank Shall Be Sealed For Life Robotically Welded Non Magnetic And Non Ferrite Stainless Steel Grade 304 Of Minimum 2 . 5 Mm Thick Having Ip67 Degree Of Protection Filled With Sf6 Gas As Insulation With Leakage Rate Less Than 0 . 1% Per Year Tested As Per Iec 62271-200 . Manual Welding Or Hermetic Sealing Of Tank Shall Be Not Be Accepted . , The Unit Shall Have Front Cable Entry For Ease Of Installation And Shall Have Site Replaceable Bushings For Ease Of Troubleshooting During Breakdown . Rmu Should Be Complete With All Accessories Such As Terminal Boots , Vpis , Cable Supports , All Front Cable Terminations , Mechanical Indications For Load Break Switch On/Off , Manometer As Per With Iec Standards 62271-200 , 60056 , 60129 , 60265 , 60298 , 60420 , 60529 And 60694 . Altitude Of Installation Up To 1000M As Per Iec 60120 . , Note:- Bushings Bolted Type Top Mounted Outside The Tank For Connection Of External Bus Bar . Also , The Outer Enclosure Shall Cover The Full Length Of The Switchgear , To Ensure Ip3x+Ip54 Protection For Cable Boxes . The Unit Shall Be Internal Arc Proof 21Ka For 1 Se With Aflr Clasification . , Tested And Totally Safe For Human Beings . The Gas Release & Personnel Safety From Internal Arc Shall Not Depend On Plinth Design . The Release Of Gas To Be From The Top Of The Unit , So That , Even If The Person Is Operating The Unit , Opening The Cover , & There Are Personnels Near The Sides Of The Rmu/Plinth , Top Release Will Ensure Their Safety . The Hot Gas Release , In Case Of An Internal Arc , In No Case Should Be From Any Side Or Bottom Of The Unit , As The Same Is Unsafe For The Operating Personnel/Pedestrian Or General Public . Bidder Shall Provide Type Test Report To Prove Compliance To The Internal Arc Fault Iac-Aflr As Per Iec 62271-200 . Internal Arc Testing Shall Be Done With Enclosure Door In Open Condition , With Switching Devices In Operation Mode As Per Specified Standard . Complete All As Directed Of Make : Schneider / Abb Safe Plus/ Siemens . , Note:-The Rate Quoted Deemed To Be Inclusive Of Necessary Earth , Feeders Snickering Marking & Foundation For Installation Of Rmu All As Per Manufactures Recommendations/ Instructions . , Supply And Laying Or Fixing Or Passing Through Pipe Or In Cable Ducts , 11000 Volts Grade Xlpe Insulated Heavy Duty ( Earthed ) , Screened , Pvc Bedded , Galvanised Steel Strip Or Wire Armoured , Electric Power Cables ( Heavy Duty ) With Aluminium Conductor 185 Sq Mm 3 Core Size Including Dismantling Old One . Make : Polycab/Havells/Finolex . , Supply And Fix Cable Jointing Kit For 11 Kv Grade Cable For Outdoor Terimination Heat Shrink Type Joint Complete With Jointing Material And Accessories Suitable For 3 Core Xlpe Armoured Al Conducter Cable Of Size 185 Sq Mm . Make: Birla 3M/ Raychem/ Denson , Supply And Fix Cable Jointing Kit For 11 Kv Grade Cable For Indoor Terimination Heat Shrink Type Joint Complete With Jointing Material And Accessories Suitable For 3 Core Xlpe Armoured Al Conducter Cable Of Size 185 Sq Mm . Make: Birla 3M/ Raychem/ Denson , Excavating In Trenches N . Exc . 1 . 5M Wide And N . Exc . 1 . 5M In Depth For Foundation , Trenches For Laying Cables/ Pipe Line Etc . And Getting Out In Soft/Loose Soil , Removing Excavated Materials To A Distance N . Exc . 50M And Depositing Where Directed At A Level N . Exc 1 . 50M Above The Starting Point . , Returning , Filling In Including Spreading Leveling Watering And Well Ramming In Layers Not Exc 25Cm In Any Type Of Soil . , Supply And Spreading Clean Dry Sand For Cable Cushioning In Trenches Complete All As Specified And As Directed . ( Note: Punned Thickness Only Shall Be Measured ) , Cutting & Cleaning Of Bushes/Small Plants , At Sub Stn Incl Surface Dressing And Removing Debris To Distance Not Exc 50 Mtr Complete , Hardcore Of Guage Exc 63Mm But N Exc . 100 Mm , Deposited , Spread And Levelled In Layers N Exc . 15 Cm Thick , Watered And Rolled/Rammed To A True Surface Complete All As Directed , Hardcore Of Gauge N Exc . 63 Mm , Deposited , Spread And Levelled In Layers N Exc . 15 Cm Thick , Watered And Rammed To A True Surface Complete All As Directed , S&F Ms Angles , Bars Flats Etc , As In Supports For Stiffening Of Fencing , Wall Ties , Hold Fasts , Clamps And Similar Small Articles Confirming To Fe 410-0 Or Fe 310-0 Complete , Preparation Of New Or Previously Untreated Steel Surfaces Of Any Description , Over 10 Cm Width Or Grith , Not Otherwise Described And Appling Two Coats Of Synthetic Enamel Paint Over A Coat Of Zinc Chromer Primer Complete . , Supply And Laying Un-Reinforced Pre Cast Cover Of Size ( 300Mmx180mmx40mm ) Laid Along Alignment Of Cable As Protection To Cable In Trenches Complete All As Specified And Directed By Engineer-In-Charge , Supply And Fix Or Laid In Road Crossing/ Fixed To Poles , Gi Pipe Of 100 Mm Size Light Grade For Protection Of Cable Complete All As Directed . Make: Tata / Jindal , M &L Plain Cement Concrete 1:4:8 Type C2 ( Using 40 Mm Aggregrate ) As In Foundations Filling Mass Concrete Complete All As Specified And Directed , M &L For Cement Concrete Pcc 1:2:4 Type B1 ( Using 20 Mm Aggregrate ) As Coping Of Poles Complete All As Specified And Directed , Supply And Fix Or Laid In Road Crossing/ Fixed To Poles , Gi Pipe Of 80 Mm Size Light Grade For Protection Of Cable Complete All As Directed Make: Tata / Jindal , Making Trench Through Horizontal Earth Boaring For Road/ Foot Path /Hard Standing/Culvert Etc For Inserting Gi Protection Pipe For Drawing Of Cable And Complete All As Directed . , Cutting Trench Through Road/ Wall To A Width Of 20Cm And Depth Of 30Cm For Inserting Gi Protection Pipe For Drawing Cable And Filling Back The Trench With Pcc 1:3:6 Type C1 Complete All As Directed . , M&L For Earthing Complete With Galvanised Steel Earthplate Of Size 60X60cmx6 . 3Mm Thick Electrode And 32X6mm Gi Strip As Earth Lead , Buried Directly In Ground ( Earth Pit Not Less Than 2 . 25M Deep Below Ground Level ) With Top Edge Of The Plate Not Less Than 1 . 5M Below Ground Level , Connected To 32X6mm Earth Strip By Means Of Nuts , Bolts , Check Nuts And Washers Of Gi All As Shown In Electrical Plate No . 5 Of Ssr Part-I , Connected To Earth Test Terminal Point All As Specified Or As Indicated Including Testing On Completion ( Rates Inclusive Of Neccessary Excavation In Any Type Of Soil , Earth Work , Pcc Pit , Ci Cover , Funnel With Watering Pipe , Suitable Size Of Light Grade Gi Protection Pipe For Earth Strip In Ground Etc . All As Required At Site For Complete Earthing ) , Supply& Fix Aluminium Strip 32 Mmx 6 Mm Complete With Saddles And Fixing Screws For Fitting The Strip , Supply And Laying Sub Class B Bricks Of Old Size ( 23X11x7cm ) Laid Along Alignment Of Cable As Protection To Cable In Trenches Complete All As Specified And Directed By Engi
