HomeMy WebLinkAboutCORRESPONDENCE - BID - 8855 TRANSFORMERS 150 KVA PAD-MOUNTED3 Phase Padmounted Transformer Bid Evaluation
# Units 2 Xfmr Type 3P Pad Bid #: 8855
Size 150 kVA Secondary V 480/277 Date: February 12, 2019
NL Loss Cost $ 3.90 Stock # T301016
FL Loss Cost $ 2.30
Specified
Impedance % 2.10 (See Impedance Requirements Table in Specification)
Supplier Manufacturer
Base Bid
$ / Each Del/Wks
Guar No
Load Loss Guar Full Load Loss Impedance Meet Specs?
Escalation
(is / is not)
a factor
Guar Total
Load Loss
Includes Winding's Stray
Losses & Losses
Associated with Auxiliary
Devices (Yes / No)
Winding's
Stray Losses
Losses
associated
with Auxiliary
Devices
Impedance
Variance Evaluated Bid
Base Bid
Extended Cost
(Total $)
NL Loss * NL
Loss Cost
FL Loss * FL
Loss Cost
Rank Based on
Bid (1 is best
choice)
Rank Based on
Evaluated bid (1 is
best choice)
Border States Howard Industries $ 10,161.86 6-8wks ARO 349 1209 2.20 Yes is not 1558 Yes 1.1 0 4.76% $ 14,303.66 $ 20,323.72 $ 1,361.10 $ 2,780.70 3 3
Peterson Central Moloney $ 11,693.00 10-12 weeks 286 1360 2.09 Yes is 1646 Yes 94 0 -0.48% $ 15,936.40 $ 23,386.00 $ 1,115.40 $ 3,128.00 5 5
WEG Transformers WEG Transformers $ 9,254.00 6-8 Weeks 365 1116 2.10 Yes is not 1481 No 28 0 0.00% $ 13,244.30 $ 18,508.00 $ 1,423.50 $ 2,566.80 1 1
WESCO ABB $ 11,219.00 6-8 WEEKS 432 862 2.11 Yes is not 1294 Yes 96 0 0.48% $ 14,886.40 $ 22,438.00 $ 1,684.80 $ 1,982.60 4 4
Western United Howard Industries $ 9,955.00 6-8wks ARO 349 1209 2.20 Yes is not 1558 Yes 1.1 0 4.76% $ 14,096.80 $ 19,910.00 $ 1,361.10 $ 2,780.70 2 2
0 -100.00% $ - $ - $ - $ - - -
0 -100.00% $ - $ - $ - $ - - -
0 -100.00% $ - $ - $ - $ - - -
0 -100.00% $ - $ - $ - $ - - -
Notes:
Based on the evaluated bids, WEG in care of KD Johnson shall be awarded bid 8855.
1 Howard (Border States) appears to meet specification.
2 Central Moloney (Peterson) appears to meet specification.
3 WEG (KD Johnson) appears to meet specification.
4 ABB (WESCO) appears to meet specification.
5 Howard (Western United) appears to meet specification.
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.