QB 25-26-085 67 to 12.74/ 7.2 KV Substation Power Transformers

City of Danville, Virginia
PO Box 3300 1040 Monument Street
Danville, VA 24543 Danville, VA 24541
CITY OF DANVILLE
DANVILLE, VIRGINIA
SWEDWOOD SUBSTATION
SPECIFICATIONS
AND PROPOSAL DOCUMENTS
FOR
67 TO 12.47/7.2 KV
SUBSTATION POWER TRANSFORMERS
QB-25-26-085
UtilityEngineering, LLC
502 Oberlin Road, Suite 330
Raleigh, North Carolina 27605
Phone: (919) 906-0886

CITY OF DANVILLE
DANVILLE, VIRGINIA
SWEDWOOD SUBSTATION
SPECIFICATIONS AND PROPOSAL DOCUMENTS
FOR
67 TO 12.47/7.2 KV
SUBSTATION POWER TRANSFORMERS
QB-25-26-085
I hereby certify this document was
prepared by me or under my direct
supervision. I also certify I am a duly
registered professional engineer under
the laws of the Commonwealth of Virginia,
Registration No. 046844.
Virginia License#: 0407007987
702 Oberlin Road, Suite 330
Raleigh, NC 27605
Phone: (919) 906-0886
June 26, 2026
Henry Michael Taylor, PE

CITY OF DANVILLE, VIRGINIA
PROPOSAL FOR
SWEDWOOD SUBSTATION
67 KV TO 12.47/7.2 KV POWER TRANSFORMERS
TABLE OF CONTENTS
Description Page
Notice to Prospective Proposals 1
Proposal Form 2
Compliance Check List 4
Certification Regarding Debarment 14
Technical Specifications 15
SEL-2414 Contact Schedule Appendix
SEL-2414 CT Inputs Schematic Appendix
63XP Sudden Pressure Seal-in Circuit Appendix
ANSI/NETA ATS-2013 Acceptance Test Specifications Appendix

NOTICE TO PROSPECTIVE PROPOSERS
Proposals will be received by the City of Danville Purchasing Office, in Room 304, 427 Patton
Street, until 2:00 p.m., local time, July 22, 2026 for the furnishing of the following:
SUBSTATION POWER TRANSFORMERS
Proposals shall be marked "Proposal for Substation Power Transformers for
Danville's Swedwood Substation". Proposals shall be mailed or hand delivered as
follows:
City of Danville,
Purchasing Office
Post Office Box 3300
427 Patton Street, Room 304
Danville, Virginia 24543
Attention: Carol Henley
Hard copies of proposal shall be submitted in duplicate. All hand-carried proposals are to
be presented to the City of Danville Purchasing Office or at the time of the proposal
opening. Cash, proposal bond, certified check or cashier's check insured by the Federal
Deposit Insurance Corporation, made payable to the City of Danville, Virginia, in the
amount of five percent (5%) of the total proposal must accompany all proposals in order
to guarantee compliance with the provisions of the proposal. Last day to submit questions
is July 9 at 2:00 PM.
The Proposer's proposal shall specify price, any applicable price terms, approval drawing
time, and delivery time. All prices shall be DDP substation site, set on the pad, fully
assembled and certified by the manufacturer as ready for operation. The Proposer's
proposal shall include an outline drawing indicating approximate overall physical
dimensions and weight.
The Purchaser reserves the right to waive minor irregularities or errors in the Proposal if
it appears that such irregularities or errors were made through inadvertence. Any such
irregularities or errors so waived must be corrected on the Proposal prior to acceptance
by the Purchaser. The Purchaser will evaluate all data provided in the proposal and select
the proposal that in the sole judgment of the Purchaser represents the best value to the
City of Danville. In addition to evaluating price, the following factors will also be
evaluated: delivery, proximity of manufacturing facility and repair facilities, cost to attend
final testing, amount of experience and quality of references of similar size and type units
produced at the proposed plant, and percent of product manufactured in the United
States. The Purchaser reserves the right to reject any or all proposals. The City of Danville
will not discriminate against any proposal holder submitting a proposal because of race,
creed, color, national origin or handicap.
City of Danville, Virginia
Purchaser
UtilityEngineering, LLC.
Engineer
Date: June 26, 2026
Danville Utilities 1
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CITY OF DANVILLE, VIRGINIA
PROPOSAL FOR
SWEDWOOD SUBSTATION
67 KV TO 12.47/7.2 KV POWER TRANSFORMERS
Base Proposal No. 1 Quantity Unit Price*
Substation Power Transformers, rated
15/20/25//28 MVA, with LTC per the
Specifications 2 $
Delivery Warranty Period
Alternate Proposal No. 1
Substation Power Transformer 2 $
as specified, with FR3 or equivalent
insulating oil
Delivery Warranty Period
Percent of Product Manufactured in the United States
*City will retain 10% of the price of each unit until transformer is energized
sometime during or after the first quarter of 2023.
Prices quoted do do not include the cost of a
crane and rigging to unload the transformers and set it on the pad.
Prices quoted do do not include the cost of a
service engineer to perform final on-site inspection and testing of the transformers.
Prices quoted do do not include the cost of a
crew and equipment to dress out the transformers after delivery.
If cost of items listed above are NOT included, specify below:
Service Unit Price
Cost of crane and rigging to unload onto pad $
Cost of service engineer $
Cost of crew to dress out transformer $
Danville Utilities 2
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Guaranteed Losses
Base Proposal No. 1
Guaranteed no-load (core) kW losses, 100%
voltage kW
Guaranteed load (winding) kW losses at 15
MVA load, 75 degreesC @8 step raise kW
@neutral position kW
@8 step lower kW
Maximum guaranteed total kW losses @ 15
MVA, 75 degreesC kW
Auxiliary kW losses, first-stage cooling kW
Auxiliary kW losses, first- and second-stage
cooling kW
Impedance, % @ 15 MVA %Z
Gallons of oil
Alternate Proposal No. 1
Guaranteed no-load (core) kW losses, 100%
voltage kW
Guaranteed load (winding) kW losses at 15
MVA load, 75 degreesC @8 step raise kW
@neutral position kW
@8 step lower kW
Maximum guaranteed total kW losses @ 15
MVA, 75 degreesC kW
Auxiliary kW losses, first-stage cooling kW
Auxiliary kW losses, first- and second-stage
cooling kW
Impedance, % @ 15 MVA %Z
Gallons of oil
Danville Utilities 3
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COMPLIANCE AND EXCEPTIONS CHECKLIST
Meets
If no, state exception
Specified or
Description Units (alternatively, Manufacturer
Rating Exceed
or Catalog No.)
s?
TRANSFORMER TYPE AND RATINGS
Frequency 60 Hz
Phases 3
HV - LV Phasor Leads by
Relationship 30o
Impedance, at ONAN IEEE %
Winding material, HV Copper
Winding material, LV Copper
Coil Construction Circular
Construction type Core
Nitrogen
Oil preservation system
blanket
Radiator finish Galvanized
ANSI 70
Paint color
Gray
Windings
High Voltage 67 kV
Low Voltage 12.47/7.2 kV
HV Connection Delta
LV Connection Wye Gnd
HV BIL 350 kV
LV BIL 110 kV
Loading
ONAN (55oC/65oC) 15/16.8 MVA
ONAF1 (55oC/65oC) 20/22.4 MVA
ONAF2 (55oC/65oC) 25/28 MVA
Temperature Rise
By Resistance oC
Hottest Spot oC
Insulation Liquid oC
High Voltage Taps (DETC)
Tap Position, -5.0% V
Tap Position, -2.5% V
Tap Position, 0% V
Tap Position, +2.5% V
Tap Position, +5.0% V
Danville Utilities 4
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COMPLIANCE AND EXCEPTIONS CHECKLIST (CONT.)
Meets
If no, state exception
Specified Unit or
Description (alternatively, Manufacturer
Rating s Exceed
or Catalog No.)
s?
BUSHINGS
HV - 69 kV (H1, H2, H3)
Manufacturer
Catalog No.
BIL 350 kV
Current Rating 400 A
Minimum Creepage IEEE
Distance C57.19.01 in
ANSI 70
Color Gray
Terminals 4-hole pads
Type Draw lead
LV - 12.47 kV (X1, X2, X3)
Manufacturer
Catalog No.
BIL 110 kV
Current Rating 2000 A
Minimum Creepage
Distance 22 in
ANSI 70
Color Gray
Terminals 4-hole pads
Type Draw lead
Neutral - 15 kV (X0)
Manufacturer
Catalog No.
BIL 110 kV
Current Rating 1200 A
Throat Connection
ANSI 70
Color Gray
Terminal 4-Hole Pad
BUSHING CURRENT TRANSFORMERS
HV - 67 kV (H1, H2, H3)
Quantity, each bushing 2
Ampere Ratio 600:5MR
Accuracy Class C400
Thermal Rating 2.0
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