HomeMy WebLinkAboutCORRESPONDENCE - BID - 8677 300 KVA PAD-MOUNTED TRANSFORMER 300-0303 Phase Padmounted Transformer Bid Evaluation
# Units 10 Xfmr Type 3P Pad Bid #: 8677
Size 300 kVA Secondary V 208/120 Date: February 7, 2018
NL Loss Cost $ 3.90 Stock # T300030
FL Loss Cost $ 2.30
Specified
Impedance % 2.50 (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 $ 9,339.68 6-8wks ARO 627 1995 2.60 Yes is not 2622 Yes 90 0 4.00% $ 16,373.48 $ 93,396.80 $ 2,445.30 $ 4,588.50 4 4
Peterson Company Central Moloney $ 9,568.00 10-12 wks 584 1847 2.32 Yes w/ Exception is 2431 Yes 252 0 -7.20% $ 16,093.70 $ 95,680.00 $ 2,277.60 $ 4,248.10 5 2
Western United WEG TRANSFORMERS $ 8,563.00 6-8 WEEKS 586 2083 2.50 Yes is not 2669 No 947.78 0 0.00% $ 15,639.30 $ 85,630.00 $ 2,285.40 $ 4,790.90 1 1
Western United ERMCO $ 9,087.00 8-10 weeks 652 1819 2.50 No is 2471 Yes 264 0 0.00% $ 15,813.50 $ 90,870.00 $ 2,542.80 $ 4,183.70 2 -
Western United Howard Industries $ 9,090.00 6-8wks ARO 627 1995 2.60 Yes is not 2622 Yes 90 0 4.00% $ 16,123.80 $ 90,900.00 $ 2,445.30 $ 4,588.50 3 3
WESCO DIST ABB Inc. $ 11,072.54 12-16 Weeks 673 1742 2.50 Yes w/ Exception is not 2415 Yes 126 0 0.00% $ 17,703.84 $ 110,725.40 $ 2,624.70 $ 4,006.60 6 5
0 -100.00% $ - $ - $ - $ - - -
0 -100.00% $ - $ - $ - $ - - -
0 -100.00% $ - $ - $ - $ - - -
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.