Military Engineer Services Tender

Supply and fix in replacement of cable jointing kit for 11 KV (earthed) grade cable for straight through heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 95 sqmm.complete all as specified and as directed.

Excavation in trenches n.exc 1.5M wide & n.exc 1.5m in depth for laying & removing of cable any sizes and getting out in soft disintegreted rock/ laterite rock complete all as specified and as directed.

Returning filling in excavated earth work including spreading, levelling, watering and well ramming in layers n.exc 25cm thick in any strata complete all as specified and as directed.

Removing excavated disintegarted rock soil to a distance n.exc 50m, depositing where directed at a level n.exc 1.5M above the starting point complete all as specified and as directed.

Supply/ Lay dry river sand /m -sand in trenches for cable protection all as directed. Note : Punned thickness only will be measured & Paid

Supply and lay un-reinforced precast concrete ISI marked cable covers, class HVP , type- I with peak, size 300mm x 180mm x 40mm, all as specified and directed.

Supply and fix in trench/on wall in repairs GI tubing 100 mm dia light grade for road crossing and cable protevtion all as specified and directed.

Material and labour forPCC 1:4:8 type D-2 using 40 mm graded stone aggregate including use and waste of form work of concrete for pole and stay foundation complete all as specified and as directed.

Supply, install, testing & commissioning of Factory Made, Outdoor type, Floor mounted 11 kV, 3 Phase, 3 Wire, 50 Hz, 630 Amps, 21 kA for 3 Seconds, SF6 Insulated, 4 Way RMU including Motorised Spring Charge Mechanism for ON / OFF the Breaker and option for Manual Spring Charging, Extendable on Both Sides with One Bus Coupler and Comprising of 01 Nos of 12 kV, 630 Amps, SF6 Insulated Load Break Switches [Incoming] and 03 Nos, 11 kV, 630 Amps, SF6 Insulated Load Break Switches [Outgoing] suitable for installations in 11 kV, 3 Phase, 3 Wire, 50 Hz effectively earthed system, including independent manual charged spring mechanism and fully rated earth switch with provision for earth and testing of cable including Air Insulated Cable Boxes with gland plates suitable for bottom entry 3 Core, XLPE, 11 kV, underground cable up to 120 Sq.mm with provision for earthing of cable including set of hooks for lifting during installation, both incoming VCB shall be consisting of Ammeter, Voltmeter, PF Meter, Frequency Meter with suitable capacity of CTs & PTs, Numeric Relay suitable for Earth Fault, Over Current, Short Circuit Current etc. complete all as specified and as directed.

Supply, install, testing & commissioning of Factory Made, Outdoor type, Floor mounted 11 kV, 3 Phase, 3 Wire, 50 Hz, 630 Amps, 21 kA for 3 Seconds, SF6 Insulated, 3 Way RMU including Motorised Spring Charge Mechanism for ON / OFF the Breaker and option for Manual Spring Charging, Extendable on Both Sides with One Bus Coupler and Comprising of 01 Nos of 12 kV, 630 Amps, SF6 Insulated Load Break Switches [Incoming] and 02 Nos, 11 kV, 630 Amps, SF6 Insulated Load Break Switches [Outgoing] suitable for installations in 11 kV, 3 Phase, 3 Wire, 50 Hz effectively earthed system, including independent manual charged spring mechanism and fully rated earth switch with provision for earth and testing of cable including Air Insulated Cable Boxes with gland plates suitable for bottom entry 3 Core, XLPE, 11 kV, underground cable up to 120 Sq.mm with provision for earthing of cable including set of hooks for lifting during installation, both incoming VCB shall be consisting of Ammeter, Voltmeter, PF Meter, Frequency Meter with suitable capacity of CTs & PTs, Numeric Relay suitable for Earth Fault, Over Current, Short Circuit Current etc. complete all as specified and as directed.

Note for Serial Item No. 12 & 13: RMU shall be 11 KV, 630 Amps, 21 kA for 3 Seconds, SF6 Insulated, Manual / Motorised, Outdoor, Extensible type with Air Insulated Bus Connected Metering unit, Type tested in line with latest IEC Standards, suitable for operations near coastal area and at 40ºC Ambient Temperature without any de-rating, Switchgear and Busbar shall all be contained in a Stainless Steel Enclosure [Minimum 2mm thick AISI 441 Grade] filled with SF6 at 0.3 Bar [300 hPa] Relative Pressure, RMU Tank shall provide Full Insulation and Switchgear shall be insensitive to the environment with Degree of Protection of IP67, Switchgear Operating Mechanism shall have an IP2X Protection and Cable Chamber shall have IP3X Protection, Outer Enclosure shall be IP 54 type tested, Powder Coated with Pure Polyester Based Paint, suitable for the site installation conditions, Accidental Overpressure due to an Internal Arc is limited by the opening of the safety valve, at the bottom of the metal enclosure, away from the operator, Plug in type of extensibility must be provided and coupling busbar should not be exposed to air to avoid oxidation of busbars. Extension of cubicle shall require 450mm to handle and the gap between the coupled RMU’s must be within 10mm.

Each Load Break Switches shall comprise of 1 Nos of 11 kV, 630 Amps, 21 kA / 3 Seconds, 3 Pole, Manual, Load Break Switch, Short Time Current [STC] 21 KA for 3 Sec, Rated Power Frequency Withstand Voltage of 28 KV, Rated Lightning Impulse Withstand Voltage 75 KVp, Fault Passage Indicator System [FPIS] & Voltage Presence Indicator System [VPIS], Self Powered Numerical Protection Relay for Short Circuit, Over Current and Earth Fault, Low Energy Release Series Trip Coil for VCB Tripping Circuit, Low Voltage Ring type CT : 100-50/1A, Class 5P10, 2.5VA for each Phase, Shunt Trip Circuit for External Trip Signal, all Mechanical Interlocks etc. as per IEC 62271-100/102/200 and 1 Nos of Fault Passage Indicator [FPI] with Current Sensors [CBCT] for Earth Fault.

[a] An operator situated in front, lateral and rear [A-FLR 21kA – 1 Sec, Downwards Exhaust, for Tank as well as Cable Compartment] of the RMU Switchboard during an internal fault shall not be exposed to the effects of Arcing. Internal Arc Type Test Report for IAC AFLR 21 kA for 1 Sec for both Tank & Cable Box shall be for minimum 3 Way / 3 Function RMU. [b] All operations shall be from front of the RMU, including access to cable bushings. Bushings along the sides or the rear of the RMU are not acceptable. [c] The rate quoted is also deemed to be including the cost of connection of HT Cables up to 3 Core, 120 Sq.mm from 2 Pole / 4 /6 Pole Structures, removing of cable loop and reconnection to RMU complete all as specified and as directed. [d] End termination joints shall be measured and paid separately. [e] CONSTRUCTION OF PLINTH / FOUNDATION FOR 11 kV RMU: The rate quoted is deemed to be including the cost of Plinth / Foundation and nothing shall be paid extra on this account. The foundation shall consists of Two Parallel Block Masonry Walls built in Cement Mortar 1:6 of length 2.10m, suitable thickness and height as per the manufacturer’s instructions over PCC Concrete Bed of 150mm thick in PCC 1:4:8, Type D-2, using 40mm graded stone aggregate over 150mm thick Hardcore of gauge not exceeding 63mm of broken stones or boulders, deposited, spread and levelled in layers not exceeding 15 cm thick watered and rolled, over 150mm thick Sand Bed, rendering to brick surfaces, 15 mm thick in Cement Mortar 1:4, and finishing the top surface even and smooth without using extra cement, applying Three coats of white washing including earthwork excavation complete all as per manufacturer’s recommendations, drawings, as specified and as directed.

Material and labour for earthing complete with galvanised steel earth plate electrode 60cm x 60cm x 6 mm thick burried directly on ground earth pit n. less than 2.25 m deep below the ground bend with top edge of the plate n. less than 1.5m below ground level connected to GI strip of size 32x6 mm upto 7.5 RM as earth lead by means of bolts,nuts,checks nuts and washers of galvanised steel including necessary earth work and excavation in any strata and PCC 1:3:6 type C2 chamber and chamber cover and light grade GI pipe 40 mm dia upto 7.5RM for protection of earth strip and GI wire etc complete all as per electrical plate No. 3 of SSR Part-I including connections with Earth testing point all as specified or indicated including testing on completion as specified and as directed. NOTE: On testing after completion if the desired earth resistance is not obtained the earthing willbe redone at no extra cost.