HomeMy WebLinkAboutBid Tally -8346 TRANSFORMERS 300 KVA THREE PHASE PAD-MOUNTED3 Phase Padmounted Transformer Bid Evaluation
W Units
Xfmr Type IsF' Pad
Bid ft:
8146
Size
100 hVn
Secondary Voltage 1:10%208
Date:
September 16, 201F
NL Loss Cost
$ 3.90
FL Loss Cost
$ 2.30
Specified
Impedance %
L50
(See Impedance Requirements Table
in Specification)
Includes Winding's
Stray Losses & Losses
Losses
Associated with
associated Base Bid
Base Bid $ /
Guar No Load
Guar Total Auxiliary Devices (Yes / Winding's
with Auxiliary Impedance Extended Cost NL LossNL FL Loss' FL
Supplier
Manufacturer
Each DsVWks
Loss
Guar Full Load Loss
Impedance Meet Space?
Escalation
Load Loss No) Stray Losses Devices Variance Evaluated Bid (Total $) Loss
Cost Loss Cost
Gridstor Energy Co CES
$ 14,960.00 10
605
1960
2.50 No
is
2565 No
0.00% $ 21,817.50 $ 164.450.00 $
2,359.50 $ 4,508.00
Irby
Eaton Cooper Powe S 9,397.55 12
595
2032
2.42 No
is
2627 Yes
-3.20% $ 16,391.65 $ 103,373.05 $
2,320.50 $ 4,673.60
Wesco
ABB
$ 8,977.10 18-20 Weeks
376
2504
2.50 Yes
is not
2880 Yes
76 60 0.00% $ 16.202.70 $ 98,748.10 $
1,466.40 $ 5,759.20
Western United
Howard Industries
S 8,712.00 6-8wks ARO
534
2430
2.60 Yes
is not
2964 Yes
10 4.00% $ 16.383.60 $ 95,832.00 $
2,082.60 $ 5.589.00
Notes:
1. CES is not on our approved manufacturer list. Gridstor Energy, representing CES, will need to send us more manufacturing information and go through our approval process before we are able to accept bids.
2. Irby states the stray and auxiliary losses are included in the guaranteed full load losses but do not include any numbers associated with losses. We need the stray losses specified and will take exception for not providing auxialiary losses, although that would be preferred. Since they do not provid
3. Wesco's lead time is concerning and looking at our current stock level, we have 8 on hand - 4 of which are reserved for upcoming work. We also have 2 in repair and based on usage trends for the past 3 years, we will need more transformers when the construction season begins to ramp up (late
4. Western United does not include auxiliary losses, however they do include the stray losses which are pertinent to calculating DOE efficiencies. Since they do state that the stray and auxiliary losses are included in the guaranteed full load losses, we can accept their bid. The auxiliary losses are nc
Based on the ranking of the evaluated bids, ABB care of W esco is the lowest evaluated responsible bidder and should be awarded 60 % of Bid 8346 (6 units). The other 40 % (5 units) of the bid shall be awarded to the next best responsible bidder which is Howard Industries care of Western United,
IEEE C57.12.00, Section 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 ±7.5%of the specified value, and those with an impedance voltage of 2.5%or less
shall have a tolerance of ±10%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.
b) The impedance of a transformer having three or more windings, or having zigzag windings, shall have a tolerance of ±10%of the 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.
c) The impedance of an autotransformer shall have a tolerance of ±10% of the specified value. Differences of impedance between duplicate autotransformers, 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) Transformers shall be considered suitable for operation in parallel when reactances come within the limitations of the preceding paragraphs, provided that turns ratios and other controlling
characteristics are suitable for such operation.
includes - typically included in full load loss - it no - then we add them to full load loss.
stra losses are importante
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