This Solicitation opportunity from Tennessee was posted on June 24, 2026. The submission period has ended. Browse the details below for market research, or find similar active opportunities.

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Submersible Single Phase Solid Insulation Distribution Transformer

Closed

Z4657State & Local

Submission Closed07/08/2026, 07:00:00 PM UTC

Contract Overview

Solicitation details, issuing organization, response deadlines, documents, and interested companies for this government contract opportunity.

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AI Contract Overview

The contract specifies the procurement of a submersible single phase solid insulation distribution transformer designed for 60 Hz operation with a 13,800 volt primary rated at 95KV BIL and a 240/120 volt three wire subtractive polarity secondary rated at 30KV BIL, suitable for installation on a 13,800 volt delta system. The transformer must meet or exceed all applicable requirements of NEMA TR-1, IEEE C57, and IEEE 386 standards, as last revised, and be engineered for continuous nameplate loading under ambient conditions of 40°C average and 50°C maximum daily temperature. The unit must not exceed 860 pounds in weight and 24 inches in length, width, and height. The core is to be constructed of silicon steel with burr-free laminations, properly annealed, and coated with a heat-resistant insulating material, grounded to the core frame, with smooth and clean welds on all core braces. Windings must be fully vacuum molded in epoxy resin using an automatic pressure gelation process, ensuring a void-free solid insulation system composed of non-hygroscopic materials stable at maximum permitted operating temperatures. The secondary leads must be securely fastened and sealed to prevent water ingress and protected from abrasion or vibration damage during transit and service. A tin-plated copper ground terminal with a two-hole pattern is required, and the entire 200°C insulation system must consist entirely of solid dielectric materials. Each transformer shall include two universal bushing wells equipped with stainless steel hold-down tabs and removable copper studs, with the bushing-well interface conforming to Figure 3 of IEEE Standard 386-1995. The solicitation is issued by Nashville Electric Service under Z4657 with a response deadline of July 8, 2026, and the point of contact is Jay Thompson.

General Info

Submersible 13.8kV to 240/120V transformer, solid insulation, NEMA/IEEE compliant, ≤860 lbs, 200°C rating, epoxy molded, seismic-ready.

Agency

Tennessee → Nashville Electric ServiceView Agency

NAICS

335311 - Power, Distribution, and Specialty Transformer ManufacturingView NAICS

Place of Performance

Nashville, TN, USA

Set-Aside

NONE

Documents

(1)

RFB Z4657 Submersible Single Phase Distribution Transformer

PDF•rfb

AI Contract Breakdown

Uniform Contract Format

Timeline

PhaseClosed

PostedJun 24

Solicitation

Response DeadlineJul 8

Deadline has passed

Submission Closed

07/08/2026, 07:00:00 PM UTC

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Organization & Contact Information

AgencyTennessee → Nashville Electric Service

Contacts1 person available

OfficeNashville, TN, USA

Organization / Agency

Tennessee → Nashville Electric Service

View Agency Profile

Office AddressNashville, TN, USA

Contacts

Jay ThompsonProcurement Contact

contact@example.gov

Full Description

KVA - SUBMERSIBLE SINGLE PHASE SOLID INSULATION DISTRIBUTION TRANSFORMER DESIGNED FOR 60 HZ, 100 C AVERAGE WINDING RISE, HAVING 13,800 VOLT PRIMARY, RATED 95KV BIL, AND 240/120 VOLT 3 WIRE SUBTRACTIVE POLARITY SECONDARY RATED FOR 30KV BIL OR INSTALLATION ON A 13,800 VOLT DELTA SYSTEM. NATIONAL STANDARDS: EACH TRANSFORMER SHALL MEET THE APPLICABLE REQUIREMENTS OF NEMA TR-1, IEEE STANDARDS C57, AND 386, ALL AS LAST REVISED, EXCEPT AS MODIFIED HEREIN. MAXIMUM DIMENSIONS: WEIGHT 860 LBS, LENGTH 24 INCHES, WIDTH 24 INCHES, HEIGHT 24 INCHES. LOADING CONDITIONS: TRANSFORMERS MUST BE DESIGNED FOR CONTINUOUS NAMEPLATE LOADING IN 40 C AVERAGE, 50 C MAXIMUM DAILY AMBIENT CONDITIONS. CORE: THE LAMINATIONS SHALL BE FREE FROM BURRS, PROPERLY ANNEALDED, AND FURNISHED WITH A HEAT-RESISTANT INSULATING COATING. THE CORE SHALL BE GROUNDED TO THE CORE FRAME. ALL WELDS ON CORE BRACES SHALL BE SMOOTH AND CLEAN. CORES SHALL BE MADE OF SILICON STEEL. WINDINGS: THE WINDINGS SHALL BE TOTALLY VACUUM MOLDED IN EPOXY RESIN USING AN AUTOMATIC PRESSURE GELLATION (APG) PROCESS WHICH SHALL RESULT IN A SOLID INSULATED PART WITH NO INTERIOR VOIDS. ALL SOLID INSULATING MATERIALS SHALL BE NON-HYGROSCOPIC AND SHALL MAINTAIN THEIR STABILITY WHEN THE TRANSFORMER IS SUBJECTED TO THE MAXIMUM TEMPERATURES PERMITTED. SECONDARY LEADS: THE SECONDARY LEADS SHALL BE WELL SECURED AND SEALED TO PREVENT THE INGRESS OF WATER. SECONDARY LEADS SHALL BE SECURED TO PREVENT Page: RFB: Close Date: Z46577/8/2026 2 ABRASION OF THE INSULATION OR WEAKENING OF THE CONDUCTOR DUE TO VIBRATION IN TRANSIT AND SERVICE. TIN PLATED COPPER GROUND TERMINALS WITH 2-HOLE PATTERN SHALL BE PROVIDED. INSULATION: THE 200 C INSULATION SYSTEM SHALL BE MADE ENTIRELY OF SOLID DIELECTRIC MATERIALS. HIGH-VOLTAGE BUSHINGS: EACH TRANSFORMER SHALL BE FURNISHED WITH TWO UNIVERSAL BUSHING WELLS WITH STAINLESS STEEL HOLD DOWN TABS AND REMOVABLE COPPER STUD. THE BUSHING-WELL INTERFACE SHALL BE PER FIGURE 3 OF IEEE STANDARD 386-1995 (STANDARD FOR SEPARABLE...