SPECIAL REPAIRS TO FOUR POLE STRUCTURE TO RING MAIN UNIT AND CONNECTED WORKS AT AF STATION HAKIMPET

Amount

M&L for cable jointing Kit for 11KV grade cable for end termination box indoor heat shrink type joint kit complete with jointing material and accessories suitable for 3 core XLPE armoured aluminum conductor cable of size 50 Sqmm to 95 Sqmm complete all as specified and as directed.

S&F HT XLPE insulated screened,PVC bedded, galvanised steel strip or wire armoured, electric power cables (heavy duty) with aluminium conductor, 11000 volts grade, cross sectional area 95 Sqmm, 3 core including taking down perished / unserviceable HT under ground cable any type complete all as specified and as directed.

Excavation in trenches not exceeding 1.5 mtr wide and not exceeding 1.5 mtr depth and getting in hard / dense soil for laying of cables / for erection of poles / for stay assembly etc complete all as specified and as directed.

M&L for Cutting of road, pavement, hard standing by using trenchless technology suitable for passing GI / HDPE pipe 80 mm dia and refilling disturbed portion with suitable PCC 1:2:4 type B- 1 mix using 20 mm graded stone aggregate to match with the existing level / surface complete all as specified and as directed.

Supply and spread clean dry river sand in trenches for cushioning of cable etc complete all as specified and as directed. (Note: Punned down thickness only shall be measured for the purpose of payment)

Supplying and laying un-reinforced precast concrete cable cover,confirm to IS 5820-1970 Class HV, Type I, flat, size 300 mm x 150 mm x 40 mm complete all as specified and as directed.

Returning, filling in trenches including spreading, levelling, watering and well ramming in layers not exceeding 25cm complete all as specified and directed by Engineer-in-Charge.

Removing surplus excavated material to a distance not exc 50m and depositing where directed at a level not exceeding 1.5 mtr above the starting point complete all as specified and as directed.

Material and labour for 80 mm dia bore tubes, 'light grade' galvanised, with all fitting and fixed complete to walls/ poles or laid in trenches/ floors for cable protection complete all as specified and as directed.

Supply, installation and commissioning of 11 KV,rated voltage 12 KV, 630 A, non extensible, outdoor (IP 54), fixed type,SF6 insulated RMU (Ring Main Unit) 3-way (comprising of 2 Nos 630 Amps, Load break switch as incoming and 1 No vaccum circuit breaker as outgoing) iinside robotically welded stainless steel 304 (Non ferrous,Non magnetic grade) having IP- 67 grade protection and impulse withstand voltage 75 KV , rated power - frequency withstand voltage 28 KV/minute, rated frequency 50 Hz and rated peak current 52.5 KA , rated short time breaking current 21 KA/ 3 sec . RMU should be provided with internal bus bars as well as earthing bus bar should be of copper, one number fault passage indicator per unit pad lock provision & complete with accessories. The RMU shall be type tested for internal arc test of 21 KA/1 Sec as per IEC 62271-220. The earting of cable sheilds. The outer enclosure main door should cover entire part of the switchgear including front cover and cable doors for providing complete IP 54 protection. The unit shall include the following with all necessary standard fitting as required at site:-(Make :- ABB,Schneider,Crompton Greaves ,Siemens)

(a) 2 Nos Incoming 630 Amps load break switch , triple pole single break 3 position (On, Off and earth having STC capacity 21 KA for 3 seconds with copper bus bar and copper earth bar fitted high fixed type voltage indicator device as per IEC 61958-1 fully rated with earth switch, spring assisted mechanism with built in operating handle, arc proof hinged type cable cover air insulated cable boxes and boots suitable for bottom front entry termination of 3 core cable 95/120/185 Sqmm. (b) 01 No Outgoing 630 Amp motorised vaccum circuit breaker, triple pole single break 3 position (On, Off and earth having STC capacity 21 KA for 3 seconds with copper bus bar and copper earth bar fitted high fixed type voltage indicator device as per IEC 61958-1 fully rated with earth switch, spring assisted mechanism with built in operating handle, arc proof hinged type cable cover air insulated cable boxes and boots suitable for bottom front entry termination of 3 core cable 95/120/185 Sqmm.

(c) Bus connected PT unit-01 No for metering consisting of following :- (i) Type M : Air insulated metering module 12 KV, 630 A 21 KA for 3 Sec. (ii) 3 voltage transformers of the ratio 11 KV/1.732/110 V/1.732.25 VA class 1.0 with HT fuses on primary side and MCB on secondary side.

(iii) 3 Digital MFM with 485 port to measure Amps, Volts, Frequency, PF, KWH, KVAR. (iv) 1 LED bulb for illumination. (v) 1 Space heater with thermostat.. (vi) 1 RYB phase indicator. (vii) 1 Cable support bus bar, stand for 3 way unit, 1 manometer & 1 perating handle. (viii) 1 Set bushing for external bus bar connection along with bus bar cover & sleeved bus bars for coupling. (ix) 2x12 V Battery with battery charger of suitable burden for motor operation. Input 230 V AC & output 24 V DC. (d) Capacitive voltage indicator fixed type VPIS 9-15 KV. (e) Necessary interlocking arrangement for safety and operation. (f) One No operating handle for manual operation. (g) PCC 1:2:4 type B1 using 20mm graded stone aggregate for foundation and bus duct of cable for RMU as per recommendation of manufacturers & as directed by Engineer-in-Charge. (h) Safety interlocks shall be provided as relevand IEC/IS standard and manufactures directions. (j) Above switchgear shall confirm to all relevant IEC/IS standard.

(k) Manual operation of vaccum circuit breaker should be possible without dismantling the motor from RMU. The motor should be fitted in such a way that it should not be required to dismantle during mannual operation. (l) Coupling of RMU and metering module should be with the help of bolted type arrangement so that the coupling at site shall be easy. Plug in type bushing shall not be acceptable. (m) Minimum 3 module should accommodate in one tank to avoid multiple coupling at site. (n) Having following additional facilities:- 1. Trip circuit supervision. 2. Disturbance recorder. 3. Event log with date and time. 4. Measurement and control feature.

(o) Current Transformers (CTs) of ratio 40/5-5A of 15 VA output, accuracy class 1.0 for metering instrument and 5P10 for 15VA accuracy for over current and earth fault protection - Sets of 03 Note :- (i) Any other parts/items not specified above but have been considered essential for smooth and safe functioning of the RMU system shall be included in the items and are covered against the quoted rate. (iI) Cable compartment shall be provided at the front side with front bolted type box covers provided with an inspection window for enabling operator to have visual inspection without opening cover in live condition for all incoming and outgoing RMU panels. (Iii) Complete with internal and external connection with each other or as per ground requirement.

M&L for earthing complete with galvanised steel earth plate electrode 600 mm x 600 mm x 6 mm thick buried directly in ground (earth pit not less than 2.25m deep below GL with top edge of plate not less than 1.50 m below normal ground level) connected to galavanised earth lead strip 32mm x 6 mm (7.5m) as means of bolts, nuts, check nuts and washer besides brazing at all joints as shown on drawings and including excavation, earth work, GI pipe (ISI mark) light grade 40mm bore for protection of GI strip from earth electrode to and including the earth test point, supplying and laying charcoal dust, common salt, PCC 1:3:6, type C-1(using 20 mm graded crushed stone aggregate ) chamber and mild steel angle iron frame 40 x 40 x 3 mm and 40 mm thick pre-cast RCC cover 1:2:4 , type B-1(using 20 mm graded crushed stone aggregate ) reinforced with 8 mm dia TMT bars @ 75 mm C/C both ways with mild steel handle 12 mm dia, PGI funnel and wire mesh, 20 mm dia GI pipe light grade(ISI marked) for watering all as shown in electrical plate No 3 of SSR Part-I and connected to earth test point including testing & taking down of old/ ineffective earthing complete all as specified and as directed. (Note:- The rates quoted shall also deemed to include the cost of Earth test point and earth strip and protection pipe upto 7.5 meter beyond the earth plates electrode)

M&L cable jointing Kit for 11KV grade cable for outdoor termination, heat shrink type joint kit complete with jointing materials and accessories suitable for 3 core XLPE armoured aluminum conductor cable of size 35 Sqmm to 95 Sqmm complete all as specified and as directed.

M/S - KRUPA ELECTRICALS

PHEJAYS AGENCIES

POWER CONSTRUCTION COMPANY

Srinivash Engineers

Srinivasa Consructions

Mavee Syndicate