138WE/L-208/2025-26

Supply, Installation, testing & commissioning of Factory Made 11 kV, 630 Amps, 21kA for 3 Seconds, AFLR, SF6 Insulated, Motorised, Outdoor 3 Way RMU consisting of 1 No VCB as Incomer and 2 Nos. of VCBs as Outgoing complete all specified and as directed. Make: ABB / Schneider / Siemens / BHEL Note: (a) The make of Vacuum Interrupter & VCB shall be of same make as the Ring Main unit. (b) The RMU shall be manufactured at OEM factory only. No other mode of manufacturing shall be accepted.

[A] RMU shall be 11 KV, 630 Amps, 21 kA for 3 Seconds, internal Arc 21kA/1Sec, AFLR, SF6 Insulated, motorized, outdoor, 3 Way RMU, left side extensible, right side metering unit, SACADA compatible overload and earth fault protection relay (Ashidha / CSPDR) with air insulated bus connected metering unit (Type +VVV+M), type tested in line with latest IEC Standards, suitable for operations at the altitude and temperature prevailing at Kiari (site location). Switchgear and busbar shall all be contained in a Stainless Steel Enclosure. All live parts, busbars and connections of RMU shall be enclosed in one SF6 tank to avoid multiple interconnections. SF6 Tank shall be sealed for life robotically welded non-magnetic and non-ferrite stainless steel Grade 304 of minimum 2.5mm thick having IP67 Degree of protection filled with SF6 gas as insulation with leakage rate, nominal operating gas pressure 1.3 BAR @ 20 Deg C, manual welding or hermetic sealing of tank shall have site replaceable bushing for ease of trouble shooting during breakdown. 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. Painting (FRONT COVER RMU: RAL7035 & (FOR MIMIC RAL7043)) & ENCLOSURE: RAL7035 & (TOP COVER & BASE STAND IN RAL 7043)). The unit shall be internal arc proof 21kA for 1 sec with AFLR classification tested and totally safe for human beings. The gas release & personnel safety from internal arc shall not depend on plinth design. The release of gas to be from the top of the unit, so that, even if the person is operating the unit, opening the cover & there are personnels near the sides of the RMU/ plinth, top release will ensure their safety. The hot gas release, in case of an internal arc, in no case shall be from any side or bottom of the unit, as the same is unsafe for the operating personnel/ pedestrian or general public. Bidder shall provide type test report to prove compliance to the Internal Arc fault IAC-AFLR as per IEC 62271-200. Internal arc testing shall be done with enclosure door in open condition, with switching devices in operation mode as per specified standard.

[B] Vacuum Circuit Breaker [VCB] Each shall be comprising of the following: [i] 11 KV, 630 Amps, 21 kA/ 3s, 3 Pole Manual/ Motorised VCB with 3 pole manual disconnector and 3 pole manual earth switch, manual/ motorized Spring Assisted Mechanism and Series Trip Coil – 1 No. [ii] Self Powered Relay with O/C, S/C, E/F Protection – 1 No [iii] CT Ratio 200-100/1A, Class - 1.0, 2.5VA for Metering and CT Ratio 200-100/1A, Class 5P10, 2.5 VA for Protection – 1 Set each [iv] Live Cable Indicator with indications at the Front and Three Inlets to check the Synchronization of Phases – 1 No [v] Cable Termination Bushing suitable for up to 1 Run, 3 Core, 185 Sqmm, XLPE Cable – 1 Set [vi] Cable Termination Cover Boots [Push on type] – 1 Set

[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 / RT 3 / 110V / RT3, 25 VA, Class-1.0 – 1 Set [iii] Voltmeter with Selector Switch – 1 No [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

Supply, installation, testing and commissioning outdoor type step down transformer 11000 volts/433 volts (at no load), AC, 3 phase 50Hz capacity 500 KVA core type double copper wound, oil immersed, naturally cooled, oil natural, air natural (ONAN) with external cooling fins, delta connected on primary side (HV) ) star connected on secondary side (LV) in accordance with vector symbol, Dyn 11 (vector group) with neutral brought out on secondary side (LV side) and having tapping at +5% to -10% HV side ( at 2.5% each step) to be changed by means of hand operated off load tap changer gear. The Transformer shall conform to IS 1180 Part 1:2014 (level-2) and BEE certified.

Supply, installation, testing and commissioning outdoor type step down transformer 11000 volts/ 433 volts (at no load), AC, 3 phase 50Hz capacity 250 KVA core type double copper wound, oil immersed, naturally cooled, oil natural, air natural (ONAN) with external cooling fins, delta connected on primary side (HV) ) star connected on secondary side (LV) in accordance with vector symbol, Dyn 11 (vector group) with neutral brought out on secondary side (LV side) and having tapping at +5% to -10% HV side ( at 2.5% each step) to be changed by means of hand operated off load tap changer gear. The Transformer shall conform to IS 1180 Part 1:2014 (level-2) and BEE certified.

Material & labour for construction of platform for installation of transformer of size all as shown in Drawing No CELZ-TD-02-2022-PLATFORM FOR TRANSFORMER UPTO 500 KVA, including chain link fencing around PCC platform for 250 KVA/ 500 KVA transformer of size 6m x 6m x 1.8m including 50 x 50 x 6mm angle iron post embedded in PCC 1:3:6 type C2 foundation of size 0.3 x 0.3 x 0.45m including angle iron 50 x 50 x 6mm at corner braced with angle iron 25 x 25 x 6mm support including filling aggregate of 40mm to 63mm size of spread thickness 100mm all around. The platform along with entrance gate of size 1.5m wide and height same as fencing complete all as specified & directed.

Supply, erecting and fixing in proper position steel tubular swaged poles of type 410-SP-55 (11.0 mtr long) complete with CI base plate, finial taper plug, bolts, nuts ,screws and pole cap and inclusive of two coats of aluminium paint over a coat of red oxide primer and synthetic enamel paint from ground level in 30cm alternative black and yellow strips upto 1.20 mtr height including preparing the surface all as specified and as directed. Note :- Earthwork, PCC foundation & coping shall be measured and paid separately.

Supply and fixing switch air break, gang operated, triple pole, mechanically operated, mounted on insulator and steel frame, with operating mechanism worked from ground level, having current rating up to 400 Amps for working pressure 11000 Volts with drop out type fuse assembly complete all as specified and as directed.

Supply and fixing lightening arrestors expulsion type suitable for HT 11KV complete with all fitting, transmission class having discharge capacity 65Kilo Amp all as specified.