PROVISION OF 11 KV SWITCH GEAR FOR MO(K) AT NAVAL BASE KOCHI

Amount

Supply, install, extension to and connecting up to existing ABB make outdoor RMU, testing and commissioning of outdoor, both side extendable HT 12 KV rated voltage and 11 KV operating voltage, 3 phase 50 Hz, two way Ring Main Unit (+CV+) Type : one fixed vacuum circuit breaker duly interlocked, and one load break motorised isolator, battery charger, totally enclosed metal clad switch gear with motorized 24 volt DC battery bank and charger, protection relays, having rated current of Ring Switch and Breaker is 630 Amp, copper bus bar with danger notice board, with factory made weather proof enclosure by the switchgear manufacturer. The unit shall be painted in RAL7012/7035 paint shade with folowing specifications and all as per the IEC 62271 –200 and Type test report of RMU should include Internal Arc with AFLR classification and as per the specification of the manufacturer.

(a) Ring Switch/Isolator (i) Capacity 11 KV, HT, 630 Amps. Triple pole, single break, having three position ('ON', 'OFF' and 'EARTH') Ring Main Switches, each with independent motor charged spring mechanism and fully rated earth switch. (ii) Air insulated cable boxes with gland plate suitable for bottom entry of single run of three core cable up to 300 sqmm. (iii) Cable Bushings (iv) Capacitive Voltage Indicator with LED Display. (v) Mimic diagram on front panel, complete with status indicators (ON-OFF-EARTH). (vi) Motorised assembly (vii) One set of Potential Free contacts for SCADA Compatibility. (viii) Fault Passage Indicators with remote contact. (ix) Angle Boots-NON TOUCH PROOF

(b) Vacuum Circuit Breaker : (i) Capacity 630 Amps, Triple pole, Vacuum Circuit Breaker, with independent motor charged spring mechanism and fully rated earth switch, with provision for earth of the cable. (ii) Air insulated cable box with gland plate suitable for bottom entry of single run of 3-core cable up to 300 sqmm. (iii) multi powered Over current & Earth Fault Relay with digital display(iv) Resin cast current transformers for protection circuit mounted on Cable bushings / cable box of ratio 60-30/1A, 5P10, 2.5VA. (v) Capacitive Voltage Indicators with LED Display. (vi) Mimic diagram on front panel, complete with status indicators (ON-OFF-EARTH). (vi) Motorised assembly. (vii) Epoxy Moulded low energy Tripping Coil for tripping the circuit breaker in fault condition. (viii) One set of Potential free contacts for SCADA Compatibility. (ix) Right Angle Boots-NON TOUCH PROOF.

(c) General spacifications : (i) One set of positive standard mechanical interlocks to avoid unsafe operations. (ii) Provision of pad locking for open, close, earth position in correct sequence. (iii) Mano meter for indicating SF6 gas pressure with green and red zone. (iv) Three mm thick stainless steel SF6 tank with robotically welded construction with IP67 protection. (v) External stud for earthing connections. (vi) SF6 Gas re filling provision. (vii) Extendable bushings future for future extension with metallic end cap cover. (viii)Battery with charger (ix) Necessary weather protection roofing using galvolume sheet to be deemed in the quoted rate.

Supply, install, connecting up existing cables, testing and commissioning of HT 12 KV rated voltage and 11 KV operating voltage, 3 phase 50 Hz, three way outdoor Ring Main Unit (+CCC+) comprising three motorised load break isolator, battery charger, totally enclosed metal clad switch gear with motorized 24 volt DC battery bank and charger, having rated current of Ring Switch and Breaker is 630 Amp, both side extensible, copper bus bar with danger notice board, with factory made weather proof enclosure by the switchgear manufacturer. The unit shall be painted in RAL7012/7035 paint shade with folowing specifications and all as per theIEC 60298,IEC 60265, IEC 60129,IEC 60420,IEC 60056,IEC 60694 and as per the specification of the manufacturer of Make : Lucy / SIEMENS / ABB.

(a) Ring Switch/Isolator (i) Capacity 11 KV, HT, 630 Amps. Triple pole, single break, having three position ('ON', 'OFF' and 'EARTH') Ring Main Switches, each with independent motor charged spring mechanism and fully rated earth switch. (ii) Air insulated cable boxes with gland plate suitable for bottom entry of single run of three core cable up to 300 sqmm. (iii) Cable Bushings (iv) Capacitive Voltage Indicator with LED Display. (v) Mimic diagram on front panel, complete with status indicators (ON-OFF-EARTH). (vi) Actuator Kit for motorised operation. (vii) One set of Potential Free contacts for SCADA Compatibility. (viii) Fault Passage Indicators (ix) One set of Right Angle Boots-NON TOUCH PROOF

(b) General spacifications : (i) One set of positive standard mechanical interlocks to avoid unsafe operations. (ii) Provision of pad locking for open, close, earth position in correct sequence. (iii) Mano meter for indicating SF6 gas pressure with green and red zone. (iv) Three mm thick stainless steel SF6 tank with robotically welded construction with IP67 protection. (v) External stud for earthing connections. (vi) SF6 Gas re filling provision. (vii) Extendable bushings future for future extension with metallic end cap cover. (viii)Battery with charger (ix) Necessary weather protection roofing using galvalume sheet appx. 6 Sqm with necessary roof truss on existing four pole structure by necessary alteraions after disconnecting all incoming and out goingcables from structure and reconnecting to RMU are deemed to be inclusive in quoted rate.

Supply and laying cables in trenches, or fixing on walls or passing through cable duct / pipe XLPE insulated, screened, PVC bedded galvanised steel strip or wire armoured electric power cables (heavyduty) with aluminium conductor, 11000 volts, grade having cross sectional area 3 core 185 sqmm including cable route indicator of standreed size all as specified and as directed.

Supply and laying cables in trenches, or fixing on walls or passing through cable duct / pipe XLPE insulated, screened, PVC bedded galvanised steel strip or wire armoured electric power cables (heavyduty) with aluminium conductor, 1100 volts, grade having cross sectional area 2 core 10 sqmm all as specified and as directed.

Supply and fixing of cable jointing kit for 11 KV (Earthed) grade cable for indoor termination heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 185 sqmm all as specified and as directed.

Materials and labour for earthing complete with galvanised iron earth plate electrode of size 600 mm x 600 mm x 6 mm thick, burried directly and preferably vertically in ground, earth pit not less than 2.25 Mtr deep below ground level with top edge of the plate not less than 1.5 m below ground level connetced with and including galvanised earth strip of size 32 x 6mm by means of nuts, bolts, check nuts and washers made of galvanised iron or steel earthing lead to be protected by galvanised iron pipe 40 mm bore (light grade) and other end connected to earthing test point or lightening arrestor or main controlling switch as directed including providing funnel with 20mm bore galvanised iron pipe (light grade), wire mesh, charcoal or coke and common salt in alternate layer of 15cm (compacted thickness) all round the earth electrode, concrete earth pit in PCC (1:3:6) type C-1 (with 20mm graded aggregate), 50mm thick precast RCC (1:2:4) cover slab (re-inforced with 8mm dia TMT bar @ 15 cm C/C bothways and suitable handle made of 10mm dia) including necessary earth work in excavation, returning filling and removal of surplus earth upto a distance not exceeding 50 m etc all as shown on electrical plate No. 3 of MES Schedule Part-I(2009) complete including testing on completion all as specified and as directed by the Engr-in-Charge.

M&L for PCC 1:3:6 type C2 (using 40mm graded stone aggregate) as in foundation, filling and mass concrete complete all specified and as directed.

Excavation in tenches not exceeding 1.5M in depth and not exceeding 1.5M wide for laying pipes and getting out in soft/loose soil all specified and as directed.

Returning fitting in soil inclduing spreading, leveling , watering and well ramming in layers not exceeding 25 cm all specified and as directed.

Removing excavated materials not exceeding 50 Mtr depositing where directed at a level not exceeding 1.5 mtr above the starting point all specified and as directed.

M & L for sand filling in trenches for cushioning of HT cables punning after filling complete as specified and as directed Note: Punned thickness shall only be measured and paid

Supply and lay un-reinforced precast concrete cable cover , class ,HV , Type I as per IS -5820 with flat size 300 x 180 x 40 mm laid dry in treches over under ground cables complete all as specified and as directed.

Supply and lay un-reinforced precast concrete cable cover , class ,LV , Type I as per IS -5820 with flat size 250 x 150 x 40 mm laid dry in treches over under ground cables complete all as specified and as directed.

Supply and fixing GI pipe light grade of size 100mm dia under road crossing for protection of cable complete all as specified and directed.

Cutting into existing bituminous carpet road/PCC hard standing to a depth of 90CM for laying of pipes/UG cables and making good the disturbed surfaces to match with the existing complete all as directed.

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