(Under Two Part Bid System) Tender No: NFV/ PUR/ BEC K for VCB

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Gilbert Mason
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1 Annexure-V (Under Two Part Bid System) Tender No: NFV/ PUR/ BEC K for VCB Technical specification for NIT SL NO 1 S.No. Description NFL requirement as per NIT Vendors Comment [Agreed / If not agreed, please comment] SCOPE OF WORK AND SPECIFICATION OF REQUIRED VACCUME CIRCUIT BREAKER TO RETROFIT EXISTING NGEF MAKE 3.3KV, 1250A MOCB OF UREA MOTOR FEEDERS. 1.01! "! " # $!%&!!'(!" )**! & +,!"-./ )5 )26 7/0-.*-0!" +,!"! " 1.02!" 1.03!"

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9 Annexure-V-A Technical Specification of the Existing 3.3 KV, 1250A,MOCB, NGEF make, Type EKU-5012/10 (Urea-1) ITEM DESCRIPTION EXISTING SYSTEM NO. SWITCH BOARD MECHANICAL CONSTRUCTION 1 Degree of Protection for cover/ IP-52 partition 2 Thickness of enclosure sheet 2.5 steel in mm 3 Panel space Heater types & Thermostate controlled Power in kw 80Watt 240V 4 Type & Shade of paint Epoxy shade -631 as per IS-5 5 Electrostatic painting No Oven dried liquid painting ELECTRICAL FEATURES 1 Insulation level a) Impulse withstand capacity 75 / 45 KV between phase to phase and phase to earth in KV b) One minute power frequency 28 / 16 KV withstand voltage kv in r.m.s. for 11 KV / 3.3 KV 2 Earthing a) The material/ sizes (mm2) AL / ( 60 X 10) b) Cable earthing facility Separate carrage c) Alarm device in earthing truck Provided d) System Grounding. Resistive Grounding 3 Indication lamp on back of panel Available for test position 4 Cubicle door can be closed with Available breaker in service & test position 5 Inter panel barrier Available

10 6 Internal wiring/size/voltage 2.5 mm2 (1.1 KV) 7 Mech. Trip Device on front of panel Inside the door BUS BARS 1 Bus bar material/ size(mm2) Aluminium 3 X 100 X 10 mm2 2 Bus support material Resin cast 3 Minimum Clearence of bus a) Phase to phase in mm 127 mm b) Phase to ground in mm 100 mm c) Creepage distance 150 mm 4 Bus bar Insulationg / material Raychem make heat shrinkable sleeve 5 Shroud at joint & disconnects Fibre reinforced polyster shrouds materials for joints & barrier. CURRENT RATING 1 a) Cotinuous in Amp A b)short time rating 26.3 KA for 3 sec. c) Dynamic KA (Peak) 67KA d) Fault Level 150 MVA 1 TEMPERATURE RISE OVER 46 0 C 45 0 C AMBIENT 1 CIRCUIT BREAKER Type EXISTING MOCB Truck Mounted, Horizontal Isolation,Tripple pole, drawout type 1250A, 3.3 KV,MOCB,NGEF, Make Type-EKU 5012/10. for motor feeder. 2 Standard to which conforms VDE:0670/ IS: 2516/ IEC:56 3 Rated voltage in KV a) Nominal 3.3KV ± 10% b) Highest 3.6 KV c) Fault level 150 MVA at 3.3 KV d) Frequency in Hz 50Hz ± 3%

11 4 Current Rating a) Rated current in Amp A b) Derated current die to site No derated current condition c) Thermal rating & duration 26.3KA for 3 sec. d) Momentrry- KA (Peak) 85KA 5 Temperature rise over ambient 45 0 C in deg. Centigrade 6 Interrupting capacity a) Symetrical- KA (r.m.s.) 30.6KA b) Asymetrical KA 31.06KA c) Momentary -KA Peak[ making current] 85 KA c) D.C. component 48% at 30.6 KA 7 Interrupting time at 100% capacity a) Arcing time in milli sec. 10 to 15 milli sec. b) Total Interrupting time (measured 70 to 75 milli sec. from trip coil energization) c) Closing time in milli sec. 90 to 95 milli sec. 8 a) Maximum over voltage factor <2.5 b) Over voltage control inherent in Inherent breaker or through separate surge diverter 9 Type of Operating mechanism a) Closing Spring charged mechanism b) Tripping Shunt trip 10 Spring Charging Motor Rating - KW / Volt KW / 110 Volt d.c. 11 Allowable range of control voltage variation a) Closing 80 to 110% of 110 volt d.c. b) Tripping 70 to 110% of 110 volt d.c. 12 Coil rating in watt

12 a) Closing 400 watt b) Tripping 100 watt 13 No. of spare auxiliary contacts NO/ NC 6 NO and 6 NC 14 Auxiliary contact rating a) A/C at 240 V 15A b) DC at 110 V 15A 15 Spring charging time in sec. 2 to 3 sec. 16 Separate spring for closing & Tripping Separate spring provided 17 Closing Spring charged after closing Yes 18 Closing Tripping Voltage 110 V DC 19 Overall dimension of Individual Panel (1000*1850*2350) mm 20 Overall dimension of Individual Breaker (714*600*928) mm ( W*D*H) 21 Minimum clearence in Air For EKU 5012/10 a) Between poles 80 mm b) Between live parts & ground 140 mm 22 Operating mechanism MWS 23 SwitchGear Duty B-3'-MB-3'-MB 24 Type of contacts a) Main a)fixed: Tulip contact Moving: Cotact rod b) Arcing b) Contact tips 25 Material of contacts a) Main Copper b) Arccing Tungsten copper sintered contact c) Thickness of silver plating 13 microns d) Contact pressure 4 kg per finger 26 Mechanical safety interlocks Provided 27 TERMINAL BLOCKS Make Type ELMEX/ TECHNOPLAST/CONNECTWEL CST

13 Current Rating 10Amp.

14 Annexure-V-B Material Name : 3.3 kv Vaccum Circuit Breaker with RC Surge Suppressor Material Required for : 3.3 KV Motor Feeder for UREA LINE 1 Technical Specifications Sheet of required VCB 3.3 KV, 1250A Motor Feeder to be filled by Tenderer. Item No. Description Technical Details Offer by the Party 1.0 Make 2.0 Type of Circuit Breaker 3.0 Ref. Standard 4.0 Principal / Collaborater 5.0 Rated Operating Sequence 6.0 Rated Voltage 7.0 Rated Frequency 8.0 No. of Poles 9 No. of Breaks per Pole 10 Switch Gear Duty 11 Make of Vaccum Bottle 12 Current Rating 12.1 Continous current in Amps Sec. R.M.S Momentary (Peak) 13 Max. Permissible Contact Resistance (in Closed Condition) per pole of VCB, (in ) 14 Breaking Current 14.1 Symmetrical KA 14.2 Asymmetrical KA 15 % D.C. Component 16 Min chopping Current 17 Type of arrangment in VCB to prevent contact bouncing during operation.

15 18 First Pole to clear factor 19 Making Current (Peak) 20 Derating Factor if any for site condition 21 Limitation of Current Rating For 21.1 Motor Duty 21.2 Capacitor Duty Item No. Description 21.3 Transformer Switching Technical Details Offer by the Party 21.4 Cable Charging 22 Insulation Level 22.1 One Min. Power Frequency Withstand Voltage 22.2 Impulse With standing Voltage 23 First pole to clear factor 24 Type and material of Fixed Contact ( Butt type or Petal Spiral type) Moving Contact( Butt type or Petal Spiral type) 25 Minimum Chopping Current (Amp.) 26 Type of Closing Mechanism 27 Type of Breaking Mechanism 28 Arc Control Device 28.1 Type 29 Mechanical safety Interlock 30 Details of Anti - Pumping Feature 31 Details of Trip Free Feature 32 Total Closing Time 33 Total Interrupting Time at 10 %, 50 %, 100 % of Rated Interrupting Capacity 34 Spring Charging Motor

16 34.1 Rating 34.2 Voltage 34.3 Insulation 34.4 Duty 34.5 Type 34.6 Spring Charging Time 35 Voltage / Current Required for 35.1 Closing 35.2 Tripping 35.3 All A.C.Supply 36 Auxiliary Contacts 36.1 No. of Contact NO / NC 36.2 Contact Rating AC / DC 36.3 Mounting Arrangement 37 Temp. Rise of Different Parts above ambient Item No. 38 Description Additional Details For 1250A,3.3KV VCBrequd to retrofit existing 1250A,3.3KV, MOCB,NGEF make, EKU5012/10 Technical Details Offer by the Party 38.1 Pressure inside the Interrupter ( Torr ) 38.2 Gap Between Fixed & Moving Contact (At Open Position) for 3.3 KV, VCB 38.3 Contact Wear Indication To Avoid Contact Bouncing during Closing of the VCB,Fixed & Moving Contact arrangement in side Vaccum Bottle Recommended Time Interval For Inspection of Breakers 39.1 After No. of Normal Operation

17 39.2 After No. of Fault clearing / Operation 40 Inspection of Breaker Mechanism 40.1 After No. of Normal Operation 40.2 After No. of Fault clearing / Operation 41 Replacement of Vaccum Bottle 42 Dimensions of VCB (L*B*H) or (W*D*H) in mm 43 Type Testing Authority & Test Report 44 Surge Suppressor 44.1 Type Mounted 3 nos on each VCB conneted to outgoing terminal side 44.2 Make 44.3 Rated Voltage in KV 44.4 Rated Current in KA 44.5 Mounting Arrangement 45 TERMINAL BLOCK 45.1 Make 45.2 Type 45.3 Current

VOLUME: IIIC SCHEDULE IIIC/4 11 KV AND 3.3 KV SWITCHGEARS

VOLUME: IIIC SCHEDULE IIIC/4 11 KV AND 3.3 KV SWITCHGEARS A. 11 KV SWITCHGEAR 1.0 SWITCHGEAR ASSEMBLY 1.1 Make : 1.2 Type : 1.3 Reference Standard : 1.4 Voltage (Nom./Max.) KV : 1.5 Phase, Frequency No,Hz.