HomeMy WebLinkAboutCORRESPONDENCE - BID - 8857 TRANSFORMERS 500 KVA PAD-MOUNTED3 Phase Padmounted Transformer Bid Evaluation
# Units 10 Xfmr Type 3P Pad Bid #: 8857
Size 500 kVA Secondary V 208Y/120 Date: February 14, 2019
NL Loss Cost $ 3.90 Stock # T300050
FL Loss Cost $ 2.30
Specified Impedance % 3.04 (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 $ 12,644.33 14-16wks ARO 872 3189 3.30 Yes No 4061 Yes 27.8 NO 8.55% $ 23,379.83 $ 126,443.30 $ 3,400.80 $ 7,334.70 3 3
Central Moloney Central Moloney $ 16,383.00 10-12 weeks 499 4545 2.97 Yes w/ Exception is 5044 Yes 833 0 -2.30% $ 28,782.60 $ 163,830.00 $ 1,946.10 $ 10,453.50 4 5
KD Johnson WEG $ 11,708.00 8-10 weeks 757 3664 3.03 Yes 4421 No 234 -0.33% $ 23,087.50 $ 117,080.00 $ 2,952.30 $ 8,427.20 1 1
WESCO ABB $ 16,813.00 6-8 WEEKS 1013 2784 3.18 YES NO 3797 YES 1022 0 4.61% $ 27,166.90 $ 168,130.00 $ 3,950.70 $ 6,403.20 5 4
Howard Industries Howard Industries $ 12,388.00 14-16wks ARO 872 3189 3.30 Yes No 4061 Yes 27.8 NO 8.55% $ 23,123.50 $ 123,880.00 $ 3,400.80 $ 7,334.70 2 2
0 -100.00% $ - $ - $ - $ - - -
0 -100.00% $ - $ - $ - $ - - -
0 -100.00% $ - $ - $ - $ - - -
0 -100.00% $ - $ - $ - $ - - -
Notes:
1 Howard Industries (Border states) appears to meet specification.
2 Central Moloney appears to meet specification with exception.
3 WEG (on approved manufacturer list as CG Power Systems) appears to meet specification.
4 ABB (WESCO) appears to meet specification.
5. Howard (Western United) appears to meet specification.
Based on the evaluated bids, WEG in care of KD Johnson should be awarded bid 8857
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.