Military Engineer Services Tender

Supply, fix, testing & commissioning HT 11KV, 3-phase 50Hz, indoor type, totally enclosed metal clad switchgear complete with Vacuum Circuit Breaker having rupturing capacity 250 MVA, overload and earth fault protection, ammeter, voltmeter and of rating up to 400 amp complete all as specified and directed.The VCB will consist of following features & specifications. a) BREAKER: 11kV, 400A, 26.3 kA, 110V DC TC CC, 230V AC motor spring charged mechanism type Vacuum Circuit breaker. b) CURRENT TRANSFORMER: 100/1-1A, Acc. Class-1, 5P10. comply IS: 2705 part I,II and III c) POTENTIAL TRANSFORMER: Ratio: 11KV/v3/110V/v3 Volts, Accuracy class is 1. Rated Burden 50VA. d) Meters: Demand controller of Accuracy class 1.0 monitoring all electrical parameters like per phase, voltage, current, demand, W, VA, VAR, all instantaneous, integrated and demand parameters, Neutral current, Frequency, PF, % load, Phase angle, THD working on MODBUS protocol. e) Digital Ammeter with Selector switch – 1 no. f) Digital Voltmeter with Selector switch – 1 no. g) RELAYS: The offered relays shall be multifunction numerical type. All Numerical relays shall have minimum following features: Relay shall be suitable for 1A CT secondary. Relay shall be draw out type Relay shall be provided with rear RS485 port for connection to remote operation. The communication protocol of the relay shall be MODBUS only. Relay setting change function. Relay Fault, Event & Disturbance recorder extraction. Reading the measurement values. Relay shall be provided with an alpha numeric LCD display and keypad for navigation and setting. h) High speed master trip relay – 1 No. i) Trip circuit supervision relay – 1 No. j) Phase sequence Indication arrangement to be provided. k) Accessories like local remote selector switch, TNC switch, Space heater with thermostat –2 nos., DC & AC control circuit through MCB, Indicating LED lamps, Spring Charged indication, DC supply healthy, Breaker ON/OFF, in service, test, disconnected position etc. should be provided l) The erection & commissioning work must be carried out under the supervision of OEM Note: Specification for item No. 02, 03 & 04 is also given in Particular Specification. Bidders will quote their rates considering these specification.

M&L for cable jointing kit for 11 KV (Earthed) grade cable for indoor termination cold shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 120 to 400 sqmm complete all as specified and directed.

M&L for earthing complete with galvanised steel, earth plate electrode 600x600x6mm thick buried directly in ground (earth pit not less than 4.5mtr below ground level) with top edge of the plate not less than 3.75 mtr below normal ground level connected to galvanised earth strip as earthing lead (32mmx6mm) by means of bolts, nuts, check nuts and washer of galvanised iron/steel connected to main switch board/main DBs/earthing test point including all necessary excavation and earth work in hard/dense soil common salt and charcoal dust mixed and packed 150mm thick all round the GI earth plate wetering pipe 20mm dia GI medium grade GI sheet 0.63mm thick funnel , wire gauge, 50mm thick RCC cover in PCC 1:2:4 type B1 duly reinforced with MS round bars 6mm dia @ 150 c/c both ways and pit/chamber in PCC 1:3:6 type C1 with suitable lifting handle to cover, GI protection pipe 40mm dia light grade upto 7.5 mtr from electrode and engraving of earth marking on near by structure/painting of earth results etc, complete all as specified and indicated on electrical plate No-1 SSR Part-I 2009 and as directed including testing on completion. Note :- (i) Earth lead beyond 7.5 mtr from electrode to earth terminal point/main switch & GI pipe light grade 15mm dia for protection against mechanical damage to lead shall be measured separately. (ii) On testing after completion if desired earth resistance is not obtained, the earthing will be redone at no extra cost.

Ditto as per item no 6 above, but using copper plate 60cm×60cm×3.15mm thick electrode and 20×3mm copper strip as earthing lead complete all as specified and directed.