FACSIMILE TRANSMISSION

Project
Date
Subject
01
: Installation of a 2000kVA Transformer in the Power Room of New
Hangar at MIA (RFQ205)
:16 October 2014
:Open Tender Clarification No.1
We (bidders) request the work plan of the new hangar construction to clarify
when the transformer room is ready for use. When can the contractor install the
transformer inside the transformer room?
Reply：The contractor may start the installation in the PT room at the beginning
of December 2014, but the exact date will be confirmed by CAM.
02
BoQ Item 2, mentioned to supply a 2000kVA transformer, however the drawing
ref. TR02 mentioned 1600kVA transformer. Please clarify which transformer
capacity is correct.
Reply：The contractor is obligated to follow the BoQ Item 2 to supply and
install a 2000kVA transformer.
03
BoQ Item 15, mentioned cable ref. Cu 5(3x1x400+1x400) and the drawings
mentioned Cu 4(3x1x400+1x400). Please clarify which cable reference is correct.
Reply: The contractor is obligated to follow the BoQ Item 15 to supply and
install Cu 5(3x1x400+1x400) cable.
04
Please explain and clarify BoQ Item 17. In order to justify the use of 5400m of
cables, to which substations do we need to lay the cables from the New Hangar?
Reply：One cable is from New Hangar to SS6 and another one is from New
Hangar to SS10. If the bidders have other suggestions or options, please
provide for our reference. (*Options or suggestions will not be
considered during the tender evaluation, options or suggestions are just
for reference only)
05
According to our understanding, we need to cut the ring at two different points.
One is from SS6 and the other from SS10. We would like to know the design
criteria from CAM and when we are allowed to make those two cuts.
Reply：The design criteria shall be equivalent to or higher than the standard of
the existing cables, and the final permission for those two cuts will be
confirmed by ADA.
06
Please explain and clarify BoQ Item 19, what is the main design concept to use
the 11kV joints?
OTF-5-A01
Reply：As the existing HV ring cables need to be cut to connect the new one, so
it is required to use the 11kV cable joint to connect them.
07
Please provide more information and location for BoQ Item 18.
Reply：Please refer to the Tender Document Section 8, photo P.29 – P.37.
08
For BoQ Item15, please kindly confirm whether only the cable to the LV fuse
Board (QGBT) or the 3200A LV Fuse Board (QGBT) is needed.
Reply：According to the BoQ Item 15, the contractor undertakes to supply and
install the cable from PT room LV switch board to new hangar QGBT
and is terminated to the 3200A ACB which is inside new hangar QGBT.
OTF-5-A01

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