Questions_-Answers_received_against_RFQ_73095201086.pdf

Questions received against RFQ 73095201086 – Motor Control Centers Upgrade:

1. On the Pump and compressor board MSB, can you please confirm that and Automatic Transfer scheme is required between the two main circuit breakers and the Tie breaker.

YES, please include replace the two (2) feeders coming from the New 480Volts Station Service according to National Electrical Codes ampacity tables.

2. On the Pump and compressor board MSB, can you please confirm the circuit breakers that are currently in service Please keep the same breakers, ampacity and starters combo. Label for the equipment shall be designated in a later date.

3. On the N4A Board, can you please conform that a 50KVA 3PH transformer is required to replace the existing transformer.

Yes it’s required. 480 Volts Y (Primary) and 240/120 Volts Y connection (Secondary Side). Customized Transformer.

4. On the N4A Board, Can you please confirm that a new wire run is required between the station services switchgear and the N4A Board Not Required. Plant Personnel already ran new 3-Phase conductors.

5. Can you please confirm that a new circuit breaker is required for the station services switchgear to power the N4A Board and that the breaker should be installed in the existing station Service switchgear prepared space?

Not required, breaker already installed in station service

6. On the N4B Board, Can you please confirm that a new wire run is required between the station services switchgear and the N4A Board?

Yes, new 3-Phase feeder wires according to National Electrical Codes ampacity tables.

7. Can you please confirm that a new circuit breaker is required for the station services switchgear to power the N4B Board and that the breaker should be installed in the existing station Service switchgear prepared space?

Yes, Breaker Capacity Protection shall be according to National Electrical Codes ampacity tables.

8. Can you please confirm that the new N4B Board should be relocated away from the existing water pipes and that the existing pipes should be extended to the new location?

Yes, Motor Control Center (N4B) shall be relocated to the new location.

9. Can you please confirm that a new circuit breaker is required for the station services switchgear to power the N1A Board and that the breaker should be installed in the existing station Service switchgear prepared space?

10. Can you please confirm that a new wire run is required between the station services switchgear and the N1A Boards?

11. Can you please confirm that a new circuit breaker is required for the station services switchgear to power the D2A & D4A Boards and that the breakers should be installed in the existing station Service switchgear prepared space?

12. Can you please confirm that a new wire run is required between the station services switchgear and the D1A, D2A, D3A and D4A Boards?

13. Can you please confirm that the TIE circuit breakers between D1A and D2A and between

D3A and D4A can be eliminated, considering that new wire runs and breakers are being added to the station Services switchgear?

Yes, Tie Breaker shall be eliminated from the new design.

14. Could you please extend the closing date for the solicitation, considering the size and technical complexity of the project there is not enough time to prepare our proposal.

The RFQ has been extended to Monday, July 24th @4:30pm MDT.