Bulyanhulu Gold Mine (“the Company”), a fully owned subsidiary of Twiga Minerals Corporation, which is ultimately owned by Barrick Gold Corporation and the Government of the United Republic of Tanzania requests the submission of Quotes from reputable, experienced, certified, and qualified parties to provide the following:
Item specifications:
- Apparent Power = 800kVA
- Input voltage: 6600 VAC
- Output voltage: 440 VAC
- Frequency = 50 Hz
- Impedance Z% =5.6
- 3Phase
- Input Voltage side should have a Ring Main Unit (RMU) switchgear. Current rating of switchgear feeders should not be less than 630Amps.
- RMU center feed/switchgear should be equipped with a protection relay.
- All standard equipment shall apply to the RMU.
- RMU should have distance pendant or standoff pendant for safe switching capabilities.
- Output Voltage side should have a 3-phase 1200Amp molded case Circuit Breaker with adjustable current setting of 500Amps until 1200Amps.
- Output Voltage sides 400VAC supply to the molded case circuit breaker phases should be of a bus bar and no single core leads/tails.
- Bus bars to be rated to carry a current carrying capacity of a 1250Amps with a short circuit rating greater than 25KA, all bus bars shall be insulated per phase, and the heat shrink insulation shall be of the standard phase colors.
- On the L.V., bus bars there should be x1 meter C.T per phase before the molded circuit breaker; C.T.’s must be connected to their separate analogue Amp. Meters. So that all three phase currents can be seen on the L.V. side.
- Molded case Circuit Breaker must have adjustable trip settings.
- Molded case Circuit Breaker must be able to with stand a short circuit rating greater than 25kA.
- Mini Substation should be of an oil Submersed Transformer with oil level indicator with alarm and trip axillary contacts available with oil cooling fins. Type of cooling – AN
- Mini Substation should have a pad lockable TAP changer available.
- Mini Substation should have a Temperature gauge with alarm and trip axillary contacts available.
- Mini Substation should have more than three or equal amount of earth studs available.
Key documents
- Clear and detailed Quotation
- Company registration documents i.e. Certificate of incorporation, business license, TIN, VRN, Tax Clearance Certificate etc.
- A written statement indicating Tanzanian ownership percentage, Tanzanian management and below management employment percentage to determine classification as an Indigenous Tanzanian Company as per the Local Content Regulation, 2018;
- Applicable certification, accreditation, affiliated registrations, and letter of dealership as required;
- Approved Local Content Plan or acknowledgement of submission from the Mining Commissioner.
- Full General Arrangement (GA) + Single Line (SLD) drawing to be submitted/supplied with every quotation for approval.
Submission of Quotes
Please submit your quotes via email to [email protected].
The reference “BUL-RFQ-22-08-01 – 800kVA Mini Substation” must be quoted in the subject line of the
email.
NB: The Company reserves the right to invite any other supplier(s) who did not submit a quote through this advertisement
Key Dates:
- Last date to submit quotes: 03th September 2022 Bulyanhulu Gold Mine Limited
