Liquid Filled Pad Mounted Transformers

Location:	South Carolina
Posted:	Jul 1, 2024
Due:	Aug 1, 2024
Agency:	Aiken County
Type of Government:	State & Local
Category:	59 - Electrical and Electronic Equipment Components 61 - Electric Wire, and Power and Distribution Equipment
Solicitation No:	Bid Number: 25-06-B
Publication URL:	To access bid details, please log in.

Procurement Bids

Bid Number:
25-06-B

Category:
Bid

Bid Name:
Liquid Filled Pad Mounted Transformers

Date Entered:
06/30/2024

Award Date:
Â

Distribution Date:
07/01/2024

Opening Date:
08/01/2024

Description:

Aiken County Government is soliciting sealed Bids for Liquid Filled Pad Mounted Transformers. Bids will be accepted until 3:00 p.m. August 1st 2024 in the Procurement Office, 1930 University Pkwy, Suite 3201, Aiken, SC 29801 then read aloud.

Bid Documents and Specifications may be viewed online at: https://www.aikencountysc.gov/Depts/PRC/PRCmain .

Questions can be emailed to procurement@aikencountysc.gov until 3:00 p.m. July 23rd 2024. Answers will be posted on our website July 26th , 2024 before 3:00p.m.
Phone calls will not be accepted.

Aiken County Procurement will not be held responsible for notifying vendors of any addenda. These are posted to our website. Please check before finalizing your bid package.

Notes:

Documents

Jul 01, 2024 12:13 PM
Specifications

Jul 01, 2024 12:12 PM
Bid Invitation To Submit

Attachment Preview

SECTION 16322

LIQUID FILLED PAD MOUNTED TRANSFORMERS

PART 1 -- GENERAL

1.1 THE REQUIREMENT

A. The Contractor shall furnish, install, and test liquid filled, pad-mount transformers for power

distribution systems as specified herein, as indicated on the Drawings, and as required to

complete the electrical installations.

B. All equipment specified in this Section shall be furnished by the transformer manufacturer who

shall be responsible for the suitability and compatibility of all included equipment.

C. Reference Section 16400, Electrical.

1.2 CODES AND STANDARDS

A. The liquid filled pad-mount transformer shall comply with the following codes and standards:

1. American National Standards Institute (ANSI):

a. ANSI C57.12.00-Latest Revision, General Requirements for Liquid Immersed

Distribution, Power, and Regulating Transformers.

b. ANSI C57.12.28-Latest Revision, Switchgear and Transformers, Pad-mounted

Equipment -Enclosure Integrity.

ANSI C57.12.26-Latest Revision, Standard for Transformers, Pad-mounted,

Compartmental Type, Self-Cooled Three Phase Distribution Transformer for Use

with Separable Insulated High Voltage Connectors (34,500 GrdY/19,920 Volts and

Below, 2500 kVA and Smaller).

d. ANSI C57.12.90-Latest Revision, Test Code for Liquid-Immersed Distribution

Power, and Regulating Transformers and Guide for Short Circuit Testing of

Distribution and Power Transformers.

e. ANSI/IEEE 386-1985, Separable Insulated Connectors for Power Distribution

Systems Above 600 Volts.

2. Institute of Electrical and Electronic Engineers (IEEE)

3. National Electrical Code (NEC)

HORSE CREEK WWTP

PAD MOUNTED TRANSFORMERS

16322-1

Project No. 23066

4. National Electrical Manufacturers Association (NEMA)

NEMA 210

1.3 SUBMITTALS

A. In accordance with the procedures and requirements set forth in the General Conditions and

Section 01300, Submittals, the Contractor shall obtain from the equipment manufacturer and

submit the following:

1. Shop Drawings

2. Operation and Maintenance Manuals

3. Spare Parts List

4. Special Tools List

5. Reports of Certified Shop Tests

B. Each submittal shall be identified by the applicable specification section.

1.4 SHOP DRAWINGS

A. Each submittal shall be complete in all respects, incorporating all information and data listed

herein and all additional information required for evaluation of the proposed equipment's

compliance with the Contract Documents.

B. Partial, incomplete or illegible submittals will be returned to the Contractor without review for

resubmittal.

C. Shop drawings shall include but not be limited to:

1. Product data sheets.

2. Sample equipment nameplate diagram.

3. Drawings showing clearly marked overall dimensions for each transformer. Drawings shall

show conduit stub-up area locations.

4. Weight of each transformer.

5. Proof of ISO 9001 registration.

HORSE CREEK WWTP

PAD MOUNTED TRANSFORMERS

16322-2

Project No. 23066

D. The submittal information shall reflect the specific equipment identification number as indicated

on the Drawings.

E. The shop drawing information shall be complete and organized in such a way that the Engineer

can determine if the requirements of these Specifications are being met. Copies of technical

bulletins, technical data sheets from "soft-cover" catalogs, and similar information which is

"highlighted" or somehow identifies the specific equipment items that the Contractor intends to

provide are acceptable and shall be submitted.

1.5 OPERATION AND MAINTENANCE MANUALS

A. The Contractor shall submit operation and maintenance manuals in accordance with the

procedures and requirements set forth in the General Conditions and Division 1.

1.6 TOOLS, SUPPLIES AND SPARE PARTS

A. The transformers shall be furnished with all special tools necessary to disassemble, service, repair

and adjust the equipment. All spare parts as recommended by the equipment manufacturer shall

be furnished to the Owner by the Contractor.

The Contractor shall furnish the following minimum spare parts for each transformer.

No. Required

1 set

Description

Primary fuses of each size provided.

B. The spare parts shall be packed in containers suitable for long term storage, bearing labels clearly

designating the contents and the pieces of equipment for which they are intended.

C. Spare parts shall be delivered at the same time as the equipment to which they pertain. The

Contractor shall properly store and safeguard such spare parts until completion of the work, at

which time they shall be delivered to the Owner.

D. Spare parts lists, included with the Shop Drawing submittal, shall indicate specific sizes, quantities,

and part numbers of the items to be furnished. Terms such as "1 lot of packing material" are not

acceptable.

E. Parts shall be completely identified with a numerical system to facilitate parts inventory control

and stocking. Each part shall be properly identified by a separate number. Those parts which are

identical for more than one size, shall have the same parts number.

1.7 IDENTIFICATION

A. Each transformer shall be identified with the identification number indicated on the Drawings. A

nameplate shall be securely affixed in a conspicuous place on each transformer.

HORSE CREEK WWTP

PAD MOUNTED TRANSFORMERS

16322-3

Project No. 23066

PART 2 -- PRODUCTS

2.1 MANUFACTURERS

A. The equipment covered by this Specification is intended to be standard equipment of proven

performance as manufactured by reputable concerns. Equipment shall be designed, constructed

and installed in accordance with the best practices of the trade, and shall operate satisfactorily

when installed as shown on the Drawings.

B. All transformer manufacturers shall be registered as an ISO 9001 quality manufacturer. The

manufacturer shall supply documentation to attest to this registration.

C. Liquid filled pad-mount transformers shall be by the Square D Company, Eaton/Cutler-Hammer,

the General Electric Company, Siemens Energy and Automation, Inc., Cooper Power Systems, Inc.,

or equal.

2.2 PAD-MOUNT TRANSFORMERS

A. Pad-mount transformers shall be of a compact design. The transformer kVA rating shall be as

indicated on the Drawings. All units shall be a pad mounted compartmental type, which when

assembled shall be an integral unit for mounting on a pad. All units shall be designed to comply

with the short circuit capability requirements of ANSI C57.12.00.

B. The transformer shall carry its continuous rating with average winding temperature rise by

resistance that shall not exceed 55 degrees C rise, based on an average ambient of 30 degrees C

over 24 hours with a maximum of 40 degrees C. The insulation system shall allow an additional

12% kVA output at 65 degrees C average winding temperature rise by resistance, on a continuous

basis, without any decrease in normal transformer life, as defined by ANSI C57.12.00.

Primary bushings shall be rated 200 Amperes.

C. Coolant and insulating fluid shall be Envirotemp FR3.

D. The high voltage windings shall be rated 12.47kV and 95kV BIL unless indicated otherwise on the

Drawings for use on a solidly grounded system and shall have two (2) 2-1/2% full capacity taps

above and below rated voltage. Impedance shall be 5.75% subject to NEMA/ANSI ± 7.5%

impedance tolerance.

E. The low voltage windings shall be rated 480Y/277VAC and 30kV BIL unless indicated otherwise on

the Drawings. Transformers shall be designed for either step up or step down use.

F. Low voltage neutrals shall be connected internally to the secondary neutral lugs and brought out

to an insulated low voltage neutral spade type bushing with an externally removable ground strap.

The low voltage neutral shall be a fully insulating bushing. A ground pad shall be provided on the

outer surface of the tank with one or more removable ground straps suitably sized for the short

HORSE CREEK WWTP

PAD MOUNTED TRANSFORMERS

16322-4

Project No. 23066

circuit rating of the transformer provided and connected between the neutral bushing and the

ground pad.

G. High and low voltage windings shall be copper.

H. The transformer and associated terminal compartments shall be so designed and constructed as

to be tamper resistant. There shall be no screws, bolts, or other fastening devices which are

externally removable. Transformers shall be suitable for outdoor installation without a fence or

other area enclosure. Full height, air filled incoming and outgoing terminal compartments with

hinged doors shall be located side by side separated by a steel barrier, with the incoming (primary)

compartment on the left. The lift-off doors shall be equipped with stainless steel hinges to allow

the doors to be removed and door stops to hold the doors open if not removed while working in

the compartments. The incoming compartment shall be accessible only after the door to the

outgoing (secondary) compartment has been opened. To facilitate making connections and

permit cable pulling, the doors shall be removable. Removable door sill on compartments shall be

provided to permit rolling or skidding of unit into place over conduit "stub-ups" in foundation.

Locking provisions shall be provided in accordance with Paragraph 7 of ANSI C57.12.26-Latest

Revision utilizing a captive penta-head bolt. Enclosure security shall conform with Paragraph 4 of

ANSI C57.12.20-Latest Revision.

I. The high voltage incoming line compartment shall be dead-front, shall enclose the high voltage

bushings, and provide for cabling from below. Externally clamped dead-front primary bushings

shall be universal bushing wells with dead front inserts or dead front, "feed thru" inserts as

required. The compartment shall have a hinged door with a fastening device which is accessible

only through the low voltage compartment and makes possible the use of a single padlock.

The Contractor shall furnish dead front, load break elbow cable terminators.

J. Furnish a load break, gang operated, liquid immersed switch that is externally operable from the

high voltage compartment through the use of a distribution hot-stick. Switch shall be the 2-

position "OFF-ON" type for use on a radial feed system. Liquid-immersed switch shall be rated

200A.

K. Primary fusing shall be:

1. BAY-O-NET type oil immersed fuses in series with oil immersed current-limiting fuses.

BAY-O-NET fuses are to be externally replaceable with a hot-stick without opening the

transformer tank.

L. The low voltage incoming line compartment shall be live-front, shall be arranged for cabling from

below, and shall contain 3-spade type externally clamped bushings for phase connections and

1-spade type bushing for neutral and/or ground connection. Low voltage bushings shall be

supported with an insulating material in a manner designed to counteract any downward forces

resulting from the connection of multiple cables to the bushings. Any manufacturer not supplying

these supports will have the transformer returned to them at their expense for reworking. Spades

HORSE CREEK WWTP

PAD MOUNTED TRANSFORMERS

16322-5

Project No. 23066

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

Daily notification on new contract opportunities

With GovernmentContracts, you can:

Find more opportunities and win more business
Receive daily alerts for all new bid opportunities
Get contract opportunities matched to your business

ONE WEEK FREE TRIAL

Liquid Filled Pad Mounted Transformers

Attachment Preview

See also