HomeMy WebLinkAboutBid Tally -8258 TRANSFORMER 50KVA SUBMERSIBLEI Phase Submersible Tranefornize r Bid Evaluation
4 Units
I" gfmr Type
Bids: -
Size
sr ay.: Secondary V
Date:
NIL Loss Cost
•.' Stocks
FL Loss Cost
1 0'
Specified
Impedance %
I.nf: (See Impedance Requirements Table in Specification)
(ncludes Winding's
Losses
Stray Loeess S Lossss
associated
Associated with Windings
In
Bass Bid
Rank Baeedon
Rank Buedon
Bus Bid
Guar No
Guar Total Aumilary Devices (Yee l Stray
Ausifiary
Impedance Extimded Cos, NL Lose'NL FL Loac'FL
&it(l is but
Evsluusd bid (I
Suppi
Mnotwu s, S/Each D"o;
Load Lees Guar Full Load Loss
Impedance Meet Specsl Escalation Load Loss Ni Losses
Devices
Variance Evaluated Bid (Ti $) Loss Cos, Lase Coat
choke)
le beat choke)
Cnnn„n' ill,,,
Central Moines, S 2.94800
to 106 All
, lu yes le not
581 ys.
.
a -I m1 S 3.815.00 $ 294,800.00 $ 344,50 $ 522,50
2 2
Howe" Indus,ries
Howard Indian. S 2.324 00 1.dwke AND
Irg; ,Irt
'e l0 Yes Nnt
609 vrs
II
o f 0,11 $ 3,219,65 S 232,400.00 S 34125 $ 554.40
1 1
Not
1. Central Mabrey's bid meets our specification
2. Howard Indusldew bid contemis a quote tar transformer design utilizing 409 SS. not 304L. I also nolked that fine drawing close not show the'sawooth' runner design as specified. This bid appears to not meet specification.
According to an E-matl from Ken Gunnufsn, the subtrull drawing was a standard sales drawing and does not represent the units they are quoting. Ken assured us that the ands will be 304L SS and have the sawtoolh mural design
Based on the ranking of the evaluated bids. Howard Industries Is the lowed evaluated bidden and should bs awarded BM 82M
IEEE C57.13.00, Seddon 9.2 Tolerances for Impedance
The tolerances for impedance shall be as follows:
a) The impedance of a two -winding transformer with an impedance voltage greater than 2.5%shall have a tolerance of t7.5%of the speafted value, and those with an impedance voltage of 2.5%or less shall have a tolerance of t10%of the specified value.
Differences of impedance between duplicate two -winding transformers, when two or more units of a given rating are produced by one manufacturer at the same time, shall not exceed 7.5%of the specified value.
I b) The impedance of a transformer having three or more windings, or having zigzag windings, shall have a tolerance of 210% of she specified value.
Differences of impedance between duplicate three -winding or zigzag transformers, when two or more units of a given rating are produced by one manufacturer at the same time, shall not exceed 10% of the specified value.
d The Impedance of an autotr insformer shall have a tolerance of tID%of the specified value. Differences of impedance between duplicate anotransformen. when two or more units of a given rating are produced by one manufacturer at the same time, shall not exceed 30%of the specified value.
d) Transformers shall be considered zuliable for operation In parallel when reactances came within the limitations of the preceding paragraphs, Provided that turns ratios and other controlling characteristics are sultable for such operation.