Military Engineer Services Tender

[A] RMU shall be floor mounted, 12 KV, 630 Amps, 21 kA for 3 Seconds, SF6 Insulated, Motorized, Outdoor extensible type, RMU with Air Insulated Bus Connected Metering unit, Type tested in line with latest IEC Standards, suitable for operations at a height up to 1000 Meters above sea level and Ambient Temperature range from 5ºC to 50ºC without any de-rating, Switchgear and Busbar shall all be contained in a Stainless Steel Enclosure [Minimum 2.5mm thick SS 304 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.

[B] Each Vacuum Circuit Breaker [VCB] shall be comprising of the following: [i] 11 KV, 630 Amps, 21 kA/ 3s, 3 Pole Motorised VCB (Non draw out type) with 3 pole manual disconnector and 3 pole manual earth switch, Motorized Spring Assisted Mechanism and Series Trip Coil – 1 No. [ii] Self Powered Relay with O/C, S/C, E/F Protection. Relay shall have a Front USB for Laptop Interface, LCD Display, 10 Event Records, 5 Fault Records, min 2 setting group and keypad for setting parameters for the relay – 1 No [iii] Resin Cast ring core Protection CT, Plate mounted type : 100-50/1A, 5P10, 2.5 VA-01 Set. [iv] Resin Cast ring core Metering CT, Plate mounted type : 100-50/1A, Cl. 1.0, 2.5 VA-01 Set. [iv] Live Cable Indicator with indications at the Front and Three Inlets to check the Synchronization of Phases – 1 No [v] Making capacity - 52.5 kAp [vi] Cable Termination Bushing suitable for up to 1 Run, 3 Core, 240 Sq.mm, XLPE Cable – 1 Set [vii] Cable Termination Cover Boots [Push on type] – 1 Set [viii] Circuit Breakers shall have Two Positions: Open or Disconnected and Closed. A separate and independent 3 Position Earthing Switch and disconnector shall be fitted to open and earth the cables in such way that interlocks prevent all unauthorised operations. An operating mechanism shall be used to manually close the circuit breaker and charge the mechanism in a single movement. An independent mechanism shall be fitted for the 3 Positions Earthing Switch and Disconnector Circuit breaker shall be fitted with a local system for manual tripping by an Integrated Push Button. There shall be no automatic reclosing. Circuit Breaker shall have a min of 2000 Mechanical and Electrical Operations and 50 Nos Short Circuit Operations, Disconnector and Earth Switch shall have a minimum of 1000 [M1] Mechanical Operations.

[C] Air Insulated Bus Connected Metering Unit comprising the following: – 1 Set [i] Air Insulated Enclosure with necessary Bus Connection – 1 No [ii] PT 11KV / √3 / 110V / √3, 50 VA, Class-1.0 – 1 Set [iii] Multi Function Meter, Digital Type [Displaying A, V, PF, Hz, KVA, KW, KVAR, KWH, KVARH etc. Class 1.0 / 0.5] with RS485 Port for Communication in Modbus Protocol. - 01 Set [iv] R / Y / B Indicating Lamps – 1 Set [v] 11 KV / 230V AC, Class 1, 500VA Control Transformer – 1 No [vi] Battery and Battery Charger, 12 Ah, [I/P-230V AC, O/P - 24V DC] – 1 No [D] Space Heater with thermostat [E] TRAFO Card with Alarm Annunciator and Hooter [F] Self Powered FRTU to detect Short Circuit and Earth Fault on the Cable System, Fault indication through LED Lamps, Reset through Remote and Local. As a minimum, the FRTU shall be capable of performing the following functions: [i] Acquiring Analog values from Multifunction Transducers or alternatively through Transducer – less modules and the status inputs of devices from the substation, processing and transmitting to Master stations. Capability to acquire analog inputs from analog input cards receiving standard signals viz. Current Loops 4 – 20 mA, etc.

[ii] Receiving and processing Digital Commands from the Master Station[s] [iii] Data transmission rates – 300 to 19200 BPS for Serial ports for MODBUS and 10/100 MBPS for TCP/IP Ethernet Ports [iv] Use of IEC 60870-5-104 Protocol to communicate with the Master Station[s] [v] Use of MODBUS over RS485 interface, Protocol to communicate with the MFTs, Protection Relay. [vi] Have required number of Communication Ports for simultaneous communication with Master Station[s], MFTs. [vii] FRTU shall have the capability of Automatic Start-Up and initialisation following restoration of Power after an outage without need of manual intervention. All restarts shall be reported to the connected Master Stations. [viii] Remote Database downloading of FRTU from Master Station from SCADA/DMS Control Center. [ix] Internal Battery Backup to hold Data in SOE Buffer Memory & also maintaining the Time & Date. [x] Communication with at least Four Master Stations simultaneously on IEC 60870-5-104 [xi] RTU shall be capable of Acquiring Analog Values through Transducers having output as 4-20 mA, 0-10 mA, 0-+10 mA etc using Analog Input Modules. [xii] FRTU shall have one TCP/IP Ethernet Port for communication with Master Station[s] using IEC 60870-5-104 Protocol. [xiii] FRTU shall have one Serial RS 485 Port for communication with MFTs and connected in daisy chain using MODBUS Protocol. Minimum 15 Analog Values [Including 4 Energy Values] shall be considered per energy meter. [xiv] Connection with adjacent modules shall be direct through busbar via metering bushing or through MV cables. VT’s and CT’s from the manufacturer conforming to IEC61869-3 and IEC 61869-2 respectively shall be accepted.

Notes: [a] An operator situated in front, lateral and rear [A-FLR 21 kA – 1 Sec, Downwards Exhaust, for Tank as well as Cable Compartment] of the RMU Switch board 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] Construction of Plinth / Foundation for 11KV RMU: The rate quoted is deemed to be including the cost of Plinth / Foundation and shall not be paid as extra on this account. The foundation shall consists of Two Parallel Brick Walls built using bricks straight or curved on plan to any radius 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 of pit size 2.10 X 1.20 X 0.60 Metres complete all as per manufacturer’s recommendations, drawings, as specified and as directed. [d] The rate quoted is also deemed to be including the cost of disconnection of HT Cables up to 3 Core, 240 Sq.mm from existing 2 Pole / 4 Pole Structures, removing of cable loop and reconnection to RMU complete all as specified and as directed by the Engineer-in-Charge. [e] End termination joints shall be measured and paid separately. [f] The make of RMU/ VCB/ vacuum interrupter/ Relays/ FRTU offered shall be of same make. Different makes shall not be accepted.

Make of RMU/ VCB/ Vacuum Interrupter/ Relays/ FRTU : ABB/ SIEMENS/ SCHNEIDER

All as described in Serial Item No. 3 herein before but 1 Way Outdoor RMU, Consisting of 1 No. of VCB as Incoming and Outgoing

Earthing complete with Galvanised Steel Earth Plate Electrode 600 X 600 X 6 mm thick burried directly in ground [earth pit not less than 2.25 m deep below ground level] with top edge of Plate not less than 1.50 m below normal ground level connected to 32 X 6mm GI Strip [Earth Lead] and GI pipe 50 mm, Medium Grade for earthing lead protection to the extent of maximum 7.5m, Earth Plate Electrode surrounded by 150mm thick packed layers of Charcoal and Common Salt filled in alternate layers, connected to the Plate by means of GI Bolts & Nuts complete all as per Electrical Plate No. 3 of SSR Part – I, connected to panel / DB including testing on completion including main earthing, Charcoal, Common Salt, PCC [1:2:4, Type B1] Pit with RCC 1:2:4, Type B1 Cover, 50 mm thick with 6 Nos, 8 mm dia TMT bars in both ways, MS frame made with 40 X 40 X 6 mm Angle Iron, MS Funnel with 20 mm bore, medium grade GI Watering pipe, wire mesh, earth work excavation, return filling, removal of surplus soil etc. and disconnecting and taking down existing Earthing of any description and making good disturbed surfaces complete all as specified and as directed.

S & F Cable End Termination, Heat Shrinkable, Outdoor type suitable for 11 KV Grade, 3 Core, 185 Sq.mm, HT, XLPE Insulated, Armoured Power Cable Aluminium Conductor and testing after jointing complete all as specified and as directed. Make: M-Seal/ Birla-3M/ Denson/ Raychem

S & F Cable End Termination, Heat Shrinkable, Outdoor type suitable for 11 KV Grade, 3 Core, 240 Sq.mm, HT, XLPE Insulated, Armoured Power Cable Aluminium Conductor and testing after jointing complete all as specified and as directed. Make: M-Seal/ Birla-3M/ Denson/ Raychem