HomeMy WebLinkAboutCORRESPONDENCE - BID - 8680 750 KVA PAD-MOUNTED TRANSFORMER 300-0763 Phase Padmounted Transformer Bid Evaluation
# Units 3 Xfmr Type 3P Pad Bid #: 8680
Size 750 kVA Secondary V 480/277 Date: February 13, 2018
NL Loss Cost $ 3.90 Stock # T300076
FL Loss Cost $ 2.30
Specified Impedance % 5.75 (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 $ 18,249.74 8-10wks ARO 905 5721 5.80 Yes is not 6626 Yes 564.3 0 0.87% $ 34,937.54 $ 54,749.22 $ 3,529.50 $ 13,158.30 6 6
Peterson Company Central Moloney $ 17,803.00 10-12 wks 1103 4216 5.40 Yes w/ Exception is 5319 Yes 896 0 -6.09% $ 31,801.50 $ 53,409.00 $ 4,301.70 $ 9,696.80 5 2
Western United WEG TRANSFORMERS $ 14,212.00 6-8 WEEKS 1034 4561 5.75 Yes is not 5595 No 1128 0 0.00% $ 28,734.90 $ 42,636.00 $ 4,032.60 $ 10,490.30 1 1
Western United ERMCO $ 15,210.00 8-10 weeks 1024 4102 5.50 No is 5126 Yes 826 0 -4.35% $ 28,638.20 $ 45,630.00 $ 3,993.60 $ 9,434.60 2 -
Western United Howard Industries $ 17,763.00 8-10wks ARO 905 5721 5.80 Yes is not 6626 Yes 564.3 0 0.87% $ 34,450.80 $ 53,289.00 $ 3,529.50 $ 13,158.30 4 5
IRBY COOPER $ 16,514.00 8 WEEKS 1002 5182 5.75 Yes is not 6184 Yes 346 0 0.00% $ 32,340.40 $ 49,542.00 $ 3,907.80 $ 11,918.60 3 4
Technology International, INC CES 0 0 -100.00% $ - $ - $ - $ - - -
WESCO DIST ABB Inc $ 18,512.95 16-20 Weeks 1091 4121 5.75 Yes w/ Exception is not 5212 Yes 151 0 0.00% $ 32,246.15 $ 55,538.85 $ 4,254.90 $ 9,478.30 7 3
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.