PROVISION OF 3 PHASE VOLTAGE STABILIZER OF CAPACITY 600KVA FOR PROJECT NCN SATELLITE DATA CENTRE AT NAVAL BASE KARWAR.

Amount

Supply, Install, testing and commissioning of servo controlled voltage stabilizer of Capacity 600 Kva (confirming as per BIS : 9815: Part 1: 1994 reaffirmed 2009) 3-phase, 50 Hz, Naturally oil cooled, indoor,Unbalanced type, copper wound ,metallic body duly powder coated with four solid cast steel bi-directional reversible detachable rollers along with lifting hooks four Nos to facilitate transporting the Voltage Stabilizer and from its point of installation , digital display type , relay free smooth and silent operation with first filling of transformer oil up to level (minimum 950ltrs BIS Certified) having following specifications:- (a) Input Voltage 360V-480V (b)Output Voltage stabilized at 415V + 1% (c) Rated frequency-50 Hz (d) No distortion in wave form (e) Response time not to exceed 20mile seconds (f) Sensitivity + 1% (g) Rate of correction 8Volts/second for single phase and 13V/seconds for phase to phase,Efiiciency More than 95% (h) Type of load :- Three phas,unbalanced type,digital display with multi-functional meter. Protections:- (a) Over load / short circuit protections on input side by ACB 1000 amp 3 pole 50KA (Thermal magnetic release adjustable) (b) High/low voltage cut off (c) By pass arrangements incase of emergency by on load change over switch 1000 amp 4 pole (d)Single phase sequence change protection capacity :- 600KVA

Note:- The specifications of servo voltage stabilizers as per IS specifications are as under :- (a) Servo voltage stabilizer shall be conforming to 9815 (Part-1): 1994 (second revision) (Reaffirmed 2019). The performance requirment should be as per Para 9 of the BIS 9815(Part-1) (Reaffirmed 2019) which is reproduced as under :- (i) The corrector shall keep the output voltage within ±1% of the rated voltage irrespective of load and input voltage range, as per clause 9.1 of BIS. (ii) Speed of correction : The rate of correction of voltage shall not be less than 6 V/s between phase and neutral. The corrector shall be free from hunting during automatic operation, as per cluase 9.3 and 9.4 of BIS. (iii) Losses : The manufacturer shall state the no load and full load losses corresponding to minimum and maximum rated input voltages . The tolerances on these declared values shall be provided in table 7 of IS 2026(Part-1):1977. The no load current shall not be more than 5% of the rated output current , Please ref BIS clause 9.4 & 9.5. (iv) Efficiency : The efficiency of servo voltage stabilizer shall not be less than 95 % as per clause 9.6 of BIS.

(b) Acceptance tests The testing of servo voltage stabilizer should be carried out in accordance with Para 11.2 of the BIS 9815 ( Part-1)(Reaffirmed 2004 )). The following shall constitute acceptance tests:- (i) Physical Examination (ii) Insulation resistance. (iii) High voltage test (iv) Leakage current test (v) Provision for earthing (vi) Output voltage (vii) No load current (viii) Measurement of no load losses. (ix) Induced voltage test (c) Type test report as per clause 11.1 for any rating as per clause 5.1 of BIS 9815 (Part-1) should be produced by the manufacturer for the specified capacity / next higher capacity of any voltage range from Govt. Lab / NABL accredited Lab. (i) input voltage 360V-480V (ii) Output voltage stabilizer at any designed/desire voltage 415V ± 1% (Adjustable) (iii) No load losses less than 0.5% (iv) full load losses less than 2.5% (v) Duty cycle - continuous 24x7 (vi) Efficiency more than 95 % (vii) Digital display Voltmeter/ Amp meter (viii)Response time not to exceed 10 milli seconds

M&L for earthing complete with galvanized steel earth plate electrode 600x600x6mm thick buried in ground vertical to a depth not less than 2.25 mtrs deep below ground level with top edge of plate not less than 1.5 mtr below normal ground level connected to galvanized GI strip of size 32 X 6 mm and 40 mm dia bore 7.5 mtr long light grade GI protection pipe for earth strip and GI watering pipe 40 mm dia medium grade from the top edge of earth plate fixed with deep cut on one end of pipe and fix from earth plate up to one feet above ground level of other end and plugged watering pipe at top with MS cap and grouted in PCC 1:2:4 of size 30 X 30 X 30 CM etc and 15 CM alternate layer of charcoal and salt around all sides of earth plate all as shown in electric plate no 3 of SSR part I of 2009. Note :- All joints either strip to strip or strip to earth plate are fixed with welded joints.

Supply & Laying including jointing, testing and commissioning in repair of 3.5 core 240 Sqmm XLPE insulated, armoured, heavy duty, LT UG electric cable with aluminum conductor 1100 volt grade including provision of lugs, glands etc laid in trenches or fixed on wall/pole or drawn through GI pipe complete all as specified and directed by Engineer-in-charge. Note:- The above quoted rate incl dismantling of existing cable from the LT panel and rejoining the cable after carrying out necessary joints and termination all as specified. Make: Havells/KEI/Polycab or equvalent

S&F DWC high density polyethelene pipes having 63/50outer dia mm, inner as per site requirement having corrugation on the wall and plain surface on the inner wall conforming to IS: 16098(Part I 2013) for protection of underground cable laid along pole/along wall/in PCC on GL/roof and including all fittings as required at site complete all as specified and directed. Make -IS Approved

Material and labour for DWC pipe coupler and other accessories with rubber rings of 63/50 mm dia all as specified and directed by engineer-in-charge

Material and labour for Cable jointing kit for 1.1 KV (Earthed) grade cable for indoor termination heat shrink type joint complete with jointing material and accessories suitable for 3.5 core XLPE armoured aluminium conductor cable of size240 sqmm all complete as specified and directed by Engr-in-charge. Make: 3M/Raychem or equvalent

Material and labour for Cable jointing kit for 1.1 KV (Earthed) grade cable for straight through heat shrink type joint complete with jointing material and accessories suitable for 3.5 core XLPE armoured aluminium conductor cable of size240 sqmm all complete as specified and directed by Engr-in-charge. Make: 3M/Raychem or equvalent

Material and labour for Cement concrete Type B2 1:2:4 (40 mm graded aggregate) in foundations, filling and mass concrete for voltage stabilizer complete all as specified as directed.

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ANKIT SHIP REPAIRERS AND SUPPLIERS

H S krishna Electricals

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