Town of Apex Jenks Substation Outdoor Power Transformer

Location:	North Carolina
Posted:	Oct 24, 2025
Due:	Dec 18, 2025
Agency:	Town of Apex
Type of Government:	State & Local
Category:	F - Natural Resources and Conservation Services
Publication URL:	To access bid details, please log in.

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Town of Apex

Apex, North Carolina

Jenks Substation

Technical Specifications

for

Outdoor Power Transformer

Town of Apex

Apex, North Carolina

Jenks Substation

Technical Specifications

for

Outdoor Power Transformer

Table of Contents

Technical Specifications

1.0 Scope .............................................................................................................T-1

2.0 Drawings & Documentation .........................................................................T-1

3.0 Delivery .........................................................................................................T-4

4.0 Ratings ..........................................................................................................T-6

5.0 Main Tank .....................................................................................................T-6

6.0 Core and Coil ................................................................................................T-10

7.0 Oil and Oil Preservation Equipment .............................................................T-12

8.0 Not Used .......................................................................................................T-15

9.0 De-energized Tap Changer (DETC) .............................................................T-15

10.0 Radiators and Auxiliary Cooling Equipment ................................................T-16

11.0 Bushings ........................................................................................................T-18

12.0 Surge Protection and Grounding ...................................................................T-19

13.0 Current Transformers ....................................................................................T-20

14.0 Control Cabinet .............................................................................................T-21

15.0 Control Wiring and Terminal Blocks ...........................................................T-23

16.0 Fittings and Accessories ...............................................................................T-25

17.0 Transformer Monitoring Equipment .............................................................T-26

18.0 Alarms, Annunciation, Measurements, Fan Control ....................................T-29

19.0 Auxiliary Equipment Power .........................................................................T-33

20.0 Sound Level ..................................................................................................T-33

21.0 Paint ..............................................................................................................T-33

22.0 Nameplates ....................................................................................................T-34

23.0 Transformer Tests .........................................................................................T-35

24.0 Certified Test Reports ...................................................................................T-43

25.0 Transformer Loss Evaluation ........................................................................T-44

26.0 Installation .....................................................................................................T-45

27.0 Warranty .......................................................................................................T-48

Appendices

Appendix A:

Appendix B:

Appendix C:

Appendix D:

Appendix E:

Ratings Schedule

Current Transformer Schedule

Ground Bus Arrangement

Typical Transformer Nameplate

Fan Control Schematic

Town of Apex

Apex, North Carolina

Technical Specifications

For

Three-Phase Outdoor Oil Filled Power Transformer

1.0 Scope

1.1 General

This specification covers the design, construction, delivery, and assembly requirements

for a two winding liquid immersed three-phase outdoor power transformer to be

installed in a substation being constructed by the Town of Apex (Town, Owner,

Purchaser). Specific rating information pertaining to this unit is provided in the ratings

schedule in Appendix A.

1.2 Standards

The transformer shall be designed, manufactured and tested in accordance with the

latest edition of applicable ANSI/IEEE ASTM, and NEMA standards. In the event of

conflict between standards, ANSI/IEEE shall take precedence over all other standards.

1.3 Where reference is made in these specifications to “ANSI/IEEE C57”, compliance is

required to the latest edition of all applicable standards contained within IEEE

Standards Collection C57 Distribution, Power, and Regulating Transformers which

contains numerous discrete standards bearing the prefix designation “ANSI C57” or

“IEEE C57”, plus IEEE 62, IEEE 259, IEEE 1276 and IEEE 1388.

1.4 All components of the transformer shall be new.

2.0 Drawings & Documentation

2.1 Proposal Documentation

2.1.1 Outline drawing with a list of all major materials to be provided.

2.1.2 Performance data and evidence of short circuit tests for similar designs.

2.1.3 Manner in which unit is to be shipped.

2.1.4 Final proposal price for manufacture, delivery, field assembly, field testing etc.,

shall be listed as one single price on the bid schedule sheet in the contract

documents. Separate prices for various services can be included in the

T-1

ECEPOWER

supporting documentation but the Owner will not be responsible for searching

through such documentation to determine the total price.

2.1.5 It is the intent of these specifications to procure a transformer that is complete

and fully functional (ready for energization) for the price stated in the proposal.

Any services not specifically mentioned herein but required for a fully

functional unit shall be supplied.

2.2 Submittal Information for Review & Approval

Prior to commencing production of the transformer, the manufacturer shall submit to

the Purchaser’s Engineer drawings and information for review of conformance to

technical specifications.

2.2.1

2.2.2

These documents shall be submitted to the Purchaser’s Engineer within six (6)

calendar weeks following receipt of order. All documents submitted shall be

clearly identified as “PRELIMINARY” and “SUBMITTED FOR

APPROVAL.”

Documents shall also clearly identify the name of the end use customer, the

name of the project, and the Purchaser’s Contract or Purchase Order Reference

Number. All drawings transmitted shall clearly identify the manufacturer’s

Shop Order Reference Number.

2.2.3 The manufacturer shall submit the approval drawings and documentation to the

Purchaser’s Engineer via e-mail in .pdf format. All drawings shall also be

submitted in .dwg format. Based upon comments by the Engineer,

manufacturer shall make corrections if necessary, and resubmit within 30

calendar days. The Engineer reserves the right to require the manufacturer to

resubmit approval documentation for additional review after corrections.

2.2.4 Approval of documentation by the Purchaser or Purchaser’s Engineer shall not

relieve the manufacturer of the responsibility for meeting all requirements of

the specifications, for correctness of the drawings and the proper design of the

equipment.

2.2.5 Drawings and information thereon submitted for approval shall include the

following:

2.2.5.1

Transformer outline drawing showing overall dimensions and weight

including all accessories and conduits. Drawings shall include center

of gravity, shipping dimensions, assembly dimensions, and weights.

Drawings shall be scaled in concurrence with the noted dimensions.

2.2.5.2 Bill of material itemizing quantity, manufacturer, model, catalog #,

rating and operating characteristics of each component and accessory.

T-2

ECEPOWER

This is the opportunity summary page. It provides an overview of this opportunity and a preview of the attached documentation.

Bid Title:	Town of Apex Jenks Substation Outdoor Power Transformer
Category:	Electric Utility Supplies
Status:	Open

Town of Apex Jenks Substation Outdoor Power Transformer

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