Pole Mounted Overhead Voltage Transformer Single Phase For America, Canada Model Number: D11

Model Series D11
Rated Voltage 2.5～34.5kV
Standard  IEEE C57.12.20
Warranty Two years
Application Outdoor/Indoor

1. Primary Electrical Distribution & Grid Layouts

  • Standalone Single-Phase Supply: The transformer can be used independently to step down medium-voltage utility lines (ranging from 2.5kV up to 34.5kV) down to low-voltage service levels (such as 120/240V, 240/480V, or 600V) to directly power local single-phase loads.

  • Three-Phase Bank Configurations: For commercial or industrial settings requiring three-phase power, multiple individual single-phase units (typically a bank of three) can be cluster-mounted together on a single pole or structurally interconnected to supply a three-phase distribution network.

2. Regional and Sector Deployments

  • Rural and Remote Power Distribution: Because single-phase overhead lines are highly cost-effective over long distances, these pole-mounted transformers are ideal for extending the electrical grid to rural areas, isolated farmlands, remote regions, and scattered village communities.

  • Residential & Neighborhood Grid Supply: They provide the final step-down voltage required for clean, reliable power routing for daily residential use, domestic appliances, and local street or public lighting infrastructure.

  • Agricultural Production: Powering standard farm infrastructure, including irrigation pumping systems, livestock housing ventilation, sorting machinery, and workshop tools.

  • Light Industrial and Commercial Facilities: Suitable for isolated workshop facilities, small-scale industrial plants, or roadside commercial operations that do not require massive substations but need independent grid tie-ins.

3. Modernization & Infrastructure Upgrades

  • Urban Grid Overhauls & Energy-Saving Projects: Built to modern efficiency benchmarks (such as DOE 2016 and NEMA TP1 standards) with specialized CRGO or Amorphous cores, these transformers are commonly utilized in urban power grid reconstruction and infrastructure upgrades aiming to drastically reduce idle core losses and line resistance.

  • Railway Infrastructure Powering: Integrated into the peripheral networks of rail systems to reliably feed auxiliary equipment, signaling systems, stations, and maintenance yards along transit routes.

4. Environmental & Installation Versatility

  • Flexible Overhead Mounting: Engineered to be bolted directly to wooden, steel, or concrete utility poles via standard support brackets, saving valuable ground real estate in congested or geographically challenging terrains.

  • Heavy-Duty Weather Resilience: Designed to IEEE C57 standards for robust enclosure integrity, making them highly suited for both extreme outdoor and sheltered indoor operations across wide temperature fluctuations (-25°C to +40°C).

  • The overhead transformer may be used alone for the supply of a single phase load or as one of three units in a bank for the supply of a three phase load.

    General

    The unit may be direct mounted to a wooden or concrete pole, or cluster mounted on a pole for three phase use. Our single phase overhead distribution transformer is commonly used in various places including rural areas, remote regions and scattered villages to provide high quality power supply for daily lighting, agricultural production and industrial plants. Aside from these, it is also suitable for the energy saving projects for railway and urban grid.
    Single Phase Overhead Distribution Pole Mounted Tr01

    Product Standards

    ●IEEE Std C57.12.00™-2000 standard – IEEE Standard for Standard General Requirements for Liquid-Immersed Distribution, Power, and Regulating Transformers.
    ●IEEE Std C57.12.20™-2005 standard – IEEE Standard for Overhead-Type Distribution Transformers, 500kVA and Smaller: High Voltage, 34500V and Below; Low Voltage, 7970/13800Y V and below.
    ●IEEE Std C57.12.31™-2010 standard – IEEE Standard for Pole Mounted Equipment – Enclosure Integrity.
    ●IEEE Std C57.12.35™-1996 standard – IEEE Standard for Bar Coding for Distribution Transformers.
    ●IEEE Std C57.12.90™-2006 standard – IEEE Standard Test Code for Liquid-Immersed Distribution, Power, and Regulating Transformers.
    ●IEEE Std C57.12.91™-2001 standard – IEEE Guide for Loading Mineral-Oil-Immersed Transformers.
    ●NEMA TR 1-1993 (R2000) Elevated Temperatures.
    (ASTM)American Society for Testing Materials

    Main Features

    ●Type: Conventional or CSP type
    ●Suitable for both indoor or outdoor
    ●Ambient temp: -25℃-+40℃
    ●Winding temp rise : 55 ℃ or 65 ℃
    ●Core: CRGO or Amorphous Core
    ●Efficiency standard: DOE 2016 or NEMA TP1
    ●Winding material : CU or AL
    ●Frequency: 50HZ or 60HZ
    ●Capacity : 5kVA to 333kVA

    Quality Assurance

    Farady Quality assurance is an integral part of the process.All electrical testing is per IEEE standards.Quality of processed parts and subassemblies are the responsibility of the production personnel.Regular quality inspections and spot checking are conducted to make sure that good and consistent quality is achieved and maintained.
    Routine Tests
    ●In-process Core Loss Test
    ●Transformer Turns Ratio Test
    ●Winding Resistance Test
    ●Polarity and Phase Displacement Test
    ●Insulation Power Factor Test
    ●Liquid Insulation DBV Test
    ●No Load Loss & Excitation Test
    ●Impedance Voltage & Load Loss Test
    ●Voltage Ratio Test
    ●Applied Potential Test
    ●Induced Potential Test
    Type Tests
    ●Temperature Rise Test
    ●Basic Impulse Level (BIL)
    ●Sound Level test

    voltage transformer single phase design constructure

    voltage transformer single phase design constructure

    Single Phase Overhead Distribution Pole Mounted Tr03
    Table of Liquid Single phase pole mounted transformer (<150kV BIL) Temp rise 65℃
    kVA Primary voltage Secondary voltage A mm B mm C mm Weight (kG) Efficiency %
    DOE2016 NEMA TP1
    10 4160

    7200

    7620

    12470

    13200 13800

    24940

    19920

    		 120/240 240/

    480

    277

    346

    600

    		 530 600 1060 160 98.70% 98.40%
    15 530 600 1060 180 98.82% 98.60%
    25 580 660 1080 230 98.95% 98.70%
    37.5 610 690 1090 290 99.05% 98.80%
    50 650 700 1100 340 99.11% 98.90%
    75 680 750 1250 450 99.19% 99.00%
    100 730 800 1250 500 99.25% 99.00%
    167 900 850 1300 780 99.33% 99.10%
    250 1200 900 1450 1100 99.39% 99.20%
    333 1350 1200 1500 1300 99.43% 99.20%

    Production Workshop

    Single Phase Overhead Distribution Pole Mounted Tr04

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    pole mounted voltage transformer single phase for america

    pole mounted voltage transformer single phase for america