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| 1 | Taking down carefully existing BER 11 KV HT switch gear of any cap and size & shiftingfrom old MRS near TCP III to MES E/M yard complete all as specified and directed. |
| 2 | Supply, installing, Commissioning & testing HT 11 KV, 3 Phase 50 Hz , rupturing capacity 350 MVA indoor type , VCB PANEL totally metal clad withdrawable type Vacuum Circuit Breaker including suitable as Incomer , including cable connection with Copper busbar of suitable rating. horizontal isolation horizontal drawout type VCB of capacity minimum 630 Amps rated current. The switchgear panel shall be made up of CRCA sheet steel duly powder coated or equivalant not less than 2.5mm thick for load bearing section and not less than 2 mm thickness for non-load bearing and shall be totally dust and vermin proof.(a) Continous current rating minimum-630A. (b) Short circuit withstand current minimum 25 KA for 1 Sec. (c) Operating Mechanism of the VCB are suitable for 10000 Mechanical Operations (d) CT Ratio should be 400-200/5-5, core 1: Class 1 ,15 VA Core 2: 5P10. 15VA burden (e) Cast resin drawout type potential transformer 11 KV/V3/110V/V3/110V/3, 100 VA , CI 0.5 (f) Protection arrangements for the breaker shall comprise of the following:- (i) Each of the incomer switchgear units shall be provided with Directional over current (67) and earth fault (67N) protection. In addition, this relay shall also provide over voltage (59), under voltage (27) & NDR (59N) function. The over voltage element shall have setting of 100 to 200% in steps of 1% and under voltage element shall have setting of 30 to 90% in steps of 1%. Alongwith over current (50/51) and earth fault (50N/51N) protection, the relay should have breaker failure (50BF), negative sequence overcurrent (46), broken conductor (46BC), and inrush blocking (68) functions. The main protection relays should be SCADA compatible with IEC 61850 Edition 2 on 2 nos. FO ports. Relay should generate GOOSE message as per IEC 61850 standard for interlocking and also ensure interoperability with third party relays. (g) Master Trip Relay (h) TCS Relay (j) The following meters, indications and acessories are to be provided with the panel. (i) Digital Volt Meter/Ammeter with built in selector switch (k) Necessary DC Supply with powerpack, healthy indication lamp & switch. (l) Multi-function meter. (m) Control:- (i) TNC (Trip, Neutral & Close) breaker control switch with indicating arrangement. (ii) Local/remote selector switch for breaker open/close operations. (n) VCB Panels should be Manufactured, designed & supplied by OEM only.VCB Panels from the System houses are not acceptable. All the main components like VCB/Relays/VI should be of same manufacturer.Vacuum interrupter shall be of OEM Make only. VCBs should be supplied with Vacuum interrupter with which Type Testing is done.The offered panels shall be tested for IAC level of 25KA for 0.1 Sec. VCBs should be Type Tested for E2/C2/M2 Class. All type test should be as per as per IEC 62271-100-2021 & IEC 62271-200-2021. |
| 3 | Supply, installing, Commissioning & testing HT 11 KV, 3 Phase 50 Hz , rupturing capacity 350 MVA indoor type , VCB PANEL totally metal clad withdrawable type Vacuum Circuit Breaker including suitable as Outgoing , including cable connection with Copper busbar of suitable rating. horizontal isolation horizontal drawout type VCB of capacity minimum 630 Amps rated current, . The switchgear panel shall be made up of CRCA sheet steel duly powder coated or equivalant not less than 2.5mm thick for load bearing section and not less than 2 mm thickness for non-load bearing and shall be totally dust and vermin proof.(a) Continious current rating minimum-630A. (b) Short circuit withstand current minimum 25 KA for 1 Sec. (c) Operating Mechanism of the VCB are suitable for 10000 Mechanical Operations (d) CT Ratio should be 200-100/5-5, core 1: Class 1 ,15 VA Core 2: 5P10. 15VA burden(e) Protection arrangements for the breaker shall comprise of the following:-(i) Each of the outgoing switchgear units shall be provided with over current (50/51) and earth fault (50N/51N) protection, the relay should have breaker failure (50BF), negative sequence overcurrent (46), broken conductor (46BC), under current (37) and inrush blocking (68) functions.The main protection relays should be SCADA compatible with IEC 61850 Edition 2 on 2 nos. FO ports. Relay should generate GOOSE message as per IEC 61850 standard for interlocking and also ensure interoperability with third party relays. (g) Master Trip Relay (h) TCS Relay (j) Auxillary Relay(6 Elements) (k) The following meters, indications and acessories are to be provided with the panel. (i) Digital Ammeter with built in selector switch (l) Necessary DC Supply with powerpack, healthy indication lamp & switch.(m) Control:-(i) TNC (Trip, Neutral & Close) breaker control switch with indicating arrangement.(ii) Local/remote selector switch for breaker open/close operations.(n) VCB Panels should be Manufactured, designed & supplied by OEM only.VCB Panels from the System houses are not acceptable. All the main components like VCB/Relays/VI should be of same manufacturer.Vacuum interrupter shall be of OEM Make only. VCBs should be supplied with Vacuum interrupter with which Type Testing is done .The offered panels shall be tested for IAC level of 25KA for 0.1Sec. VCBs should be Type Tested for E2/C2/M2 Class.All type test should be as per as per IEC 62271-100-2021 & IEC 62271-200-2021. |
| 4 | Supply, installing, Commissioning & testing HT 11 KV, 3 Phase 50 Hz , rupturing capacity 350 MVA indoor type , VCB PANEL totally metal clad withdrawable type Vacuum Circuit Breaker including suitable as Bus coupler , including cable connection with Copper busbar of suitable rating. horizontal isolation horizontal drawout type VCB of capacity minimum 630 Amps rated current, . The switchgear panel shall be made up of CRCA sheet steel duly powder coated or equivalant not less than 2.5mm thick for load bearing section and not less than 2 mm thickness for non-load bearing and shall be totally dust and vermin proof.(a) Continious current rating minimum-630A. (b) Short circuit withstand current minimum 25 KA for 1 Sec. (c) Operating Mechanism of the VCB are suitable for 10000 Mechanical Operations (d) CT Ratio should be 400-200/5-5, core 1: Class 1 ,15 VA Core 2: 5P10. 15VA burden(e) Protection arrangements for the breaker shall comprise of the following:- (i) Each of the Bus coupler switchgear units shall be provided with over current (50/51) and earth fault (50N/51N) protection, the relay should have breaker failure (50BF), negative sequence overcurrent (46), broken conductor (46BC),under current (37) and inrush blocking (68) functions. The main protection relay should be SCADA compatible with IEC 61850 Edition 2 on 2 nos. FO ports. Relay should generate GOOSE message as per IEC 61850 standard for interlocking and also ensure interoperability with third party relays. (f) Master Trip Relay (g) TCS Relay (h) The following meters, indications and acessories are to be provided with the panel. (i) Digital Volt Meter/Ammeter with built in selector switch(j) Necessary DC Supply with powerpack, healthy indication lamp & switch.(k) Multi-function meter. (l) Control:- (i) TNC (Trip, Neutral & Close) breaker control switch with indicating arrangement. (ii) Local/remote selector switch for breaker open/close operations. (m) VCB Panels should be Manufactured, designed & supplied by OEM only. VCB Panels from the System houses are not acceptable. All the main components like VCB/Relays/VI should be of same manufacturer.Vacuum interrupter shall be of OEM Make only. VCBs should be supplied with Vacuum interrupter with which Type Testing is done.The offered panels shall be tested for IAC level of 25KA for 0.1Sec. VCBs should be Type Tested for E2/C2/M2 Class. All type test should be as per as per IEC 62271-100-2021. & IEC62271-200-2021 |
| 5 | M&L for earthing complete with galvanized steel earth plate electrode 60cmx60cmx6mm 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 1.5 m deep below normal ground level and connected to and including galvanized iron earth streep 25x4 mm by means of GI welding thimbles, etc as shown in electrical plate No 3 of SSR Part-I and connection to main switch board/Test point/panel/equipment and testing on completion including excavation and earth work in any type of soil, returning filling in, and removal of surplus spoil to a distance not exc 50 metre, charcoal and salt in alternate layer 15 cm thick all around the earth plate electrode, MS funnel with wire mesh, GI pipe medium grade 20 mm bore for watering and 40mm bore upto 7.50 metre long GI pipe light grade for earth wire protection fixed with poles/wall with two clamps, made from MS flat 25 mmx3mm, welding,PCCchamber (1:3:6) type C1, 40mm thick precast RCC cover 1:2:4 type B1 shall be provided on CI frame etc complete including taking down existing u/s earthing and site clearnce complete all as specified & as directed. |
