- 2079 Shrawan · 4 marks
Quotation for HV breaker of a 48 MW plant
Short answer
Assuming 132 kV evacuation, full load current 247 A gives 1250 A rating. Quote four 145 kV SF6 outdoor live-tank breakers, 31.5 kA, spring-charged, with spares and supervision, total indicative cost NPR 2,61,03,000 including VAT.
Make a tentative an example type quotation of a high voltage side "circuit breaker" for power evacuation purpose at switch yard of a hydropower project that has installed capacity about 48 MW and line length to grid point substation is about 15 km.
A tentative quotation lists the technical data, quantity and price of the breaker so that the developer can budget and compare offers. Assumptions: 48 MW plant with 2 × 24 MW units, evacuation at 132 kV over 15 km by a double-circuit line, so the switchyard has 2 transformer bays and 2 line bays.
Rated current check: A, so a standard 1250 A rating is ample.
QUOTATION (example, indicative prices)
To: XYZ Hydropower Ltd., Kathmandu. Ref: 132 kV switchyard circuit breakers. Validity: 90 days.
| S.N. | Description | Qty | Unit price (NPR) | Amount (NPR) |
|---|---|---|---|---|
| 1 | 145 kV, 3-pole, outdoor SF6 live-tank circuit breaker, 1250 A, 31.5 kA for 3 s, making 80 kA peak, BIL 650 kVp, spring-charged mechanism, O-0.3 s-CO-3 min-CO, single-pole operation for auto-reclose (line bays), 110 V DC control, SF6 density monitor, support structure | 4 | 55,00,000 | 2,20,00,000 |
| 2 | Spares: trip/close coils, gas filling kit, density monitor | 1 lot | – | 5,00,000 |
| 3 | Supervision of erection and testing at site | 1 lot | – | 6,00,000 |
| Subtotal | 2,31,00,000 | |||
| VAT 13% | 30,03,000 | |||
| Grand total | 2,61,03,000 |
Terms:
- Standards: IEC 62271-100; type test reports enclosed.
- Delivery: CIF Birgunj/site within 6 months of LC; packing for hill transport.
- Warranty: 24 months from commissioning; payment by LC (10% advance, 80% on delivery, 10% after commissioning).
Prices are only indicative for budgeting; actual prices come from competitive bids.
✓ Answer checked by Claude Opus 5.5 (high effort)
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