CA NO.CWE BLY/GE (E)/158 OF 2025- 2026PROVN OF RING MAIN UNIT (RMU) AT SUB STATION NO 01 OF RTS AND DEPOT HEMPUR UNDER GE EAST BAREILLY

Supply & Install testing and commisioning of 11 KV Ring Main unit (RMU) with one incoming and two outgoing with following specification :- Factory made and tested 11 KV RMU compact, metal-enclosed out foroor type rated for 11 KV system (50 Hz) compring of 01- Incoming - Vacum circuit breaker (VCB) unit. 02 - Outgoing - Two Nos with load break switch (LBS) for feeders/Transformer connection. Single bus arrangement with earthing switch and provision for current transformers (CTs) and metering protection. * Rated Voltage - 11 KV (Phase to Phase) * Rated frequency 50 Hz. * Rated normal current - 630 A. * Rated short time with stand current (ICW) - 20 KA for 1 second. * Rated breaking current of VCB - as per IEC - 6227/-100. * RMU and its components shall comply with minimum. (a) Meal enclosed switch gear and controlger RMU assemblies IEC-62271-200. (b) IEC-60265-Load break switches/Disconnections earthing switchs. (c) IEC 60529-Enclosese protection (for type test and internal are test). (d) IEC-62271-100 for high voltage circuit breaker (VCB per formanced test)

Supply and laying XLPE insulated, screened, PVC bedded, galvanised steel strip or wire armoured, electric power cables (heavy duty) earthed with aluminium conductor, 11000 volts grade cross secional area 95 Sqmm 3 core complete all as specified and directed.

Supply and laying cable jointing kit for 11 KV grade for outdoor termination end heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured AI conductor cable of size 50 to 95 Sq mm complete all as specified and directed.

M&L in replacement for earthing complete with galvanised steel earth plate electrode 600x600x6 mm thick burried directly in ground (earth pit not less than 2.25 mtrs deep below ground level) with top edge of the plate not less than 1.5 meters below normal ground level connected to galvanized iron earth strip 32X6mm by means of bolts nuts check-nuts and washers of galvanized iron or steel as shown in electrical plate No 5 of MES schedule Part-I connecting to earthing test point and testing on completion with including 15mm bore light grade GI protection pipe, RCC 1:2:4 type B1 20mm thick cover reinforced with 6mm thick dia MS bars 3 Nos both ways with lifting hook made out of 6mm dia MS bar, watering arrangement with funnel and wire mesh and 20mm bore light grade GI watering pipe, earthing lead from earth plate to eqipment to point (up to 7.5M long) common salt and charcoal filling, necessary excavation and earth work complete all as specified and directed.

M&L for earth continuity conductor or main earthing lead fixed to wall on batten or recess or chases or buried in ground or drawn in conduit/ pipe or fixed to poles or any other indicated situation for loop earthing etc. as required 32x6 mm galvanised iron strip complete all as specified and directed.

Excavation in trenches not exc. 1.5 metre wide and not exc. 1.50 mtr depth for laying of underground cable, erection of poles etc. and getting out in soft/loose soil including separating serviceable bricks for re-use at site obtained during excavation complete all as specified and directed.

Returning, filling in including spreading, levelling, watering and well ramming in layers not exceeding 25cm thick complete all as specified and directed.

Removal of surplus soil not exc 50mtr distance and depositing where complete all as specified and directed.

M&L for dry screened river bed sand cushioning 8cm before laying the cable and 15cm after laying the cable and further hand punned to form a uniform complete all as specified and directed.

M&L for laying bricks, sub class'B' for protection of cable, in trenches, laid in dry flat across the cable with length of whole bricks complete all as specified and directed.

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