11kV Single Phase Pole Mounted Transformer
The 11kV single phase pole mounted transformer is a compact, high-performance solution for overhead distribution systems, stepping down 11kV primary voltage to standard secondary levels like 230V, 240V, or 415V for safe end-user supply. Built with high-grade silicon steel cores and copper or aluminum windings, it minimizes core and copper losses while meeting IEC 60076 and relevant IEEE/ANSI standards for energy efficiency. The oil-immersed tank with ONAN natural cooling supports a 55-65°C temperature rise, ensuring reliable operation under varying loads. Features include robust bushings, pressure relief mechanisms, and optional surge protection, making it weather-resistant and low-maintenance for exposed pole installations. This transformer excels in providing stable, low-distortion power with excellent overload tolerance, perfect for utilities expanding access in diverse terrains.
- Primary Voltage Ratings 10.5kV-11.5kV or others
- Secondary Voltage Ratings 230V、240V、220/440V 或 415V
- H.V. Tap Range ± 2×2.5% HV taps or others
- Type Conventional Type
- BIL 11 kV
- Standards IEEE, ANSI, NEMA, ASTM
- Application Residential, commercial, agricultural and light industrial
- Power Rating 5kVA - 333kVA
- Certificate CE, ISO
- Cooling Method ONAN, KNAN
- Oil Mineral Oil or FR3
- Opeartion Step Down
Technical Specifications
Customization Optional
Packing and Shipping
Manufacturer Test
Routine Testing
Application
Technical Specifications
11kV Single Phase Pole Mounted Transformer
Technical Specifications
Accessories
| Rated Power | 5kVA - 333kVA |
| Rating Primary Voltage | 10.5kV-11.5kV |
| Secondary Voltage | 480-240V 240-120V 277V Customized |
| Frequency | 50/60Hz |
| Vector Group | Ii0,Ii6 |
| Winding Material | Aluminum/Copper |
| Efficiency | As IEEE,Doe 2016,CAS Std or Customized |
| Impedance Voltage | Nominal 2% or Customized 1.1-5.75% |
| Altitude | ≤1,000m or Customized |
| Color | ANSI 70 Light gray/Munsell 7GY3.29/1.5 or customized etc |
| Tank material | Mild Steel, 304 Stainless Steel |
| Lifting Lug |
| Tap Changer |
| Pressure Relief Valve |
| Tank Cover and clamp |
| L.V Bushing |
| HV Bushing |
| Ground Strap |
| Nameplate |
| Non-PCB decal |
| High Voltage Warning Signs |
| Suport lug |
| Oil fill valve |
Customization Optional
11kV Single Phase Pole Mounted Transformer
Adapt the 11kV single phase pole mounted transformer to your specific grid needs with extensive customization for seamless performance and compliance. Primary voltage can be fixed at 11kV or include dual/tap configurations like 10.5kV-11.5kV, while secondary outputs offer flexibility with 230V, 240V, 220/440V, or 415V options to suit regional standards in Europe, Asia, or emerging markets. Winding materials range from cost-effective aluminum for lighter weight to high-conductivity copper for better efficiency and heat management in heavier loads. Frequency supports 50Hz (common for 11kV systems) or 60Hz adaptations, and cooling upgrades from standard ONAN to forced options enhance capacity in hot climates. Off-circuit tap changers with ±2x2.5% or wider ranges allow voltage optimization without de-energizing. Impedance levels from 4-5% balance fault protection and regulation, with protective add-ons like HV fuses, lightning arresters, or bird guards for enhanced safety in rural or stormy areas. Eco-friendly ester fluids replace mineral oil for fire resistance and sustainability. These tailored features improve energy conservation, fault resilience, and installation ease, delivering a versatile transformer optimized for overhead lines in challenging environments.
Further options include tank reinforcements for high-wind or seismic zones, anti-corrosion coatings for coastal exposure, or integrated monitoring like oil thermometers and load indicators for proactive maintenance. Bushing insulation levels up to 75kV BIL accommodate system surges, while enclosure modifications reduce noise or improve ventilation. Capacity scaling around typical 16-200kVA ratings supports project growth, and core designs cut no-load losses for superior efficiency. Whether for remote villages or suburban extensions, these customizations ensure the 11kV single phase pole mounted transformer meets exact requirements, offering reliable, standards-compliant power distribution with minimized operational costs and maximum longevity.
Packing and Shipping
11kV Single Phase Pole Mounted Transformer
Packaging for the 11kV single phase pole mounted transformer uses sturdy, fumigated wooden crates reinforced with steel straps and internal supports to handle weight and prevent shifting. High-density foam padding, corner guards, and vibration absorbers protect bushings, taps, and the tank during movement. Moisture prevention relies on vacuum sealing, desiccant inclusion, and nitrogen filling to safeguard oil quality and internal components from humidity or oxidation. Ports and bushings are capped securely, with partial oil drainage for transport safety, and all units feature clear labels for handling, weight, sling points, and hazard info per international norms. This thorough packing ensures the transformer withstands rough handling in logistics chains while arriving in optimal condition.
Shipping is tailored for efficiency, with domestic routes using flatbed trucks or specialized trailers equipped with secure tie-downs and weather covers to protect against elements. International transport favors 20/40-foot containers or flat-racks for ocean freight, with anti-corrosion measures for marine exposure and lashing compliant to IMO standards. Urgent needs may use air cargo, though size typically favors sea or road. Real-time GPS tracking and comprehensive insurance cover the journey, while adherence to IEC, customs, and export regulations speeds clearance and minimizes delays for global delivery of the 11kV single phase pole mounted transformer.
Sustainability informs our approach, utilizing recyclable materials and route optimization to reduce emissions. Impact detectors on crates record transit conditions for post-delivery checks. Accessories like arresters or fuses ship separately with checklists for verification. Experienced carriers in heavy electrical goods manage oversized loads, securing permits and following safety protocols across terrains.
Upon arrival, unpacking guides detail safe handling, oil refilling, and torque specs for connections. We coordinate site delivery, including route planning for remote poles. This complete process guarantees the 11kV single phase pole mounted transformer reaches installation sites intact, ready for swift commissioning and reliable service in overhead power systems.
Shipping is tailored for efficiency, with domestic routes using flatbed trucks or specialized trailers equipped with secure tie-downs and weather covers to protect against elements. International transport favors 20/40-foot containers or flat-racks for ocean freight, with anti-corrosion measures for marine exposure and lashing compliant to IMO standards. Urgent needs may use air cargo, though size typically favors sea or road. Real-time GPS tracking and comprehensive insurance cover the journey, while adherence to IEC, customs, and export regulations speeds clearance and minimizes delays for global delivery of the 11kV single phase pole mounted transformer.
Sustainability informs our approach, utilizing recyclable materials and route optimization to reduce emissions. Impact detectors on crates record transit conditions for post-delivery checks. Accessories like arresters or fuses ship separately with checklists for verification. Experienced carriers in heavy electrical goods manage oversized loads, securing permits and following safety protocols across terrains.
Upon arrival, unpacking guides detail safe handling, oil refilling, and torque specs for connections. We coordinate site delivery, including route planning for remote poles. This complete process guarantees the 11kV single phase pole mounted transformer reaches installation sites intact, ready for swift commissioning and reliable service in overhead power systems.
32
32 years of industry experience
Manufacturer Test
11kV Single Phase Pole Mounted Transformer
Progress Test
Midway in assembly for the 11kV single phase pole mounted transformer, short-circuit impedance testing injects low voltage to target 4-4.5% with minimal variance. Polarity checks employ DC methods for correct orientation. Thermal previews via current heating monitor temperature gradients. Vacuum drying verifies moisture removal below 0.5%. Tap changer cycling tests mechanical reliability and contact resistance under 1 milliohm. Cooling circuit flow simulation confirms unobstructed paths. Wiring insulation megger tests exceed 500 megohms at 1000V. Protective device simulations validate response. Reports align with IEC 60076, enabling pre-final adjustments. Inter-layer insulation hipot testing applies stepped voltages to detect weaknesses early. Turns ratio preliminary verification uses ratio meters to confirm accuracy within 0.2% across taps. Core flux density is gauged with meters to avoid saturation. Oil quality sampling ensures breakdown voltage above 30kV and low acidity.
Design Tests
All transformers will be tested after finishing the production, test items as follows:
♦ Insulation Power Factor
♦ Ratio, Polarity, and Phase Relation
♦ Winding Resistance
♦ Impulse Tests
♦ On load Loss Test
♦ No Load Loss Test
♦ Leak Test
♦ DC Insulation Resistance Test
♦ Transformer Turns Ratio/TTR (All Tap Voltages)
♦ Impedance Voltage & Load Loss (Rated Voltage)
♦ Polarity, 1-Ph
♦ Excitation & No-Load Loss (Rated Voltage)
♦ Applied Voltage
♦ Induced Voltage
♦ Dielectric Withstand (Hipot)
Transformer Factory Acceptance Test
Factory acceptance testing for the 11kV single phase pole mounted transformer opens with visual and dimensional inspections against drawings, verifying tank quality, bushing positions, and labeling. Winding DC resistance uses precise bridges, temperature-corrected to reference, within 1% tolerance. Turns ratio and polarity across taps confirm with TTR accuracy to 0.3%. Power factor/dissipation at 10kV limits tan delta below 0.5%. No-load loss and current at rated voltage meet efficiency specs, excitation under 2%. Load loss and impedance via short-circuit method yield accurate efficiency. Power frequency withstand applies 28kV for one minute without breakdown. Induced voltage tests insulation at higher frequency. Oil tests include dielectric over 35kV and low DGA gases. Advancing FAT for the 11kV single phase pole mounted transformer, impulse testing at 75kV BIL checks waveform integrity. Noise levels measure below standards in controlled settings. Temperature rise test simulates load, capping oil/winding rises at 60°C. Accessory functions verify gauges, relief valves, and taps. Frequency response analysis ensures mechanical stability. All results per IEC 60076/IEEE C57 compile in reports with calibration traceability, client witnessing, and corrective actions for approval before shipment.
Routine Test - DC Insulation Resistance Test
Purpose of Testing
The purpose of DC insulation resistance testing is to measure the insulation resistance of a device by applying a DC voltage, thereby evaluating the health of the insulation material and the voltage withstand capability of the electrical device. This test helps detect potential insulation aging, moisture or damage, preventing electrical failures in the device.
Testing Equipment
Insulation resistance tester (e.g. Megger, Fluke, Hioki, Klein Tools, etc.)
Voltage source (usually 500V, 1000V, 2500V, or customized according to customer requirements)
Temperature and humidity meter (used to record the ambient temperature and humidity during the test to ensure that the test conditions meet the standard requirements.)
Voltage source (usually 500V, 1000V, 2500V, or customized according to customer requirements)
Temperature and humidity meter (used to record the ambient temperature and humidity during the test to ensure that the test conditions meet the standard requirements.)
Pre-Test Preparation
Make sure the device is properly grounded and fully discharged to prevent residual charge in the device from affecting the test results.
Perform the test under suitable environmental conditions. It is recommended to have a relative humidity below 75%, no rain, and a temperature range of 20-30°C to avoid moisture or temperature fluctuations affecting the test results.
Perform the test under suitable environmental conditions. It is recommended to have a relative humidity below 75%, no rain, and a temperature range of 20-30°C to avoid moisture or temperature fluctuations affecting the test results.
Test Progress
Connect the Test Instrument:
Connect an insulation resistance tester to the high voltage terminal of the device under test and to ground.
Apply Test Voltage:
Select an appropriate test voltage based on the rated voltage of the equipment .
Connect an insulation resistance tester to the high voltage terminal of the device under test and to ground.
Apply Test Voltage:
Select an appropriate test voltage based on the rated voltage of the equipment .
Measure and Record
Start the test and record the following parameters:
Insulation resistance value (MΩ)
Applied voltage
Ambient temperature and humidity during testing
Insulation resistance value (MΩ)
Applied voltage
Ambient temperature and humidity during testing
Temperature Correction
The measured insulation resistance values are corrected to a reference temperature (usually 20°C) for accurate evaluation.
Repeat Testing (if necessary)
Measure different windings (high voltage, medium voltage, low voltage) or each bushing separately, and conduct comparative analysis to ensure the insulation status of all parts.
Evaluation Criteria (Reference)
Insulation resistance ≥ 1000 MΩ (excellent)
500 MΩ ≤ Insulation resistance < 1000 MΩ (good)
100 MΩ ≤ Insulation resistance < 500 MΩ
Insulation resistance < 100 MΩ
500 MΩ ≤ Insulation resistance < 1000 MΩ (good)
100 MΩ ≤ Insulation resistance < 500 MΩ
Insulation resistance < 100 MΩ
*These comprehensive tests ensure that each transformer meets performance standards and operates
reliably under various conditions.
Application
The 11kV single phase pole mounted transformer suits rural electrification combined with agricultural needs, stepping down 11kV lines to 230V/240V for remote farms, irrigation pumps, and village homes while integrating small solar arrays for enhanced reliability.
Technical Advantages
● 30+ years of manufacturing experience
● ISO and UL certified production
● Customized cable and transformer solutions
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What is a Transformer?A transformer is an electrical device used to change the voltage of alternating current (AC). It works on the principle of electromagnetic induction, converting high-voltage current into low-voltage current or low-voltage current into high-voltage current. Transformers are widely used in power transmission, distribution systems, and various electronic devices.
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What are the main uses of a transformer?The main use of a transformer is voltage conversion. Transformers are used in power transmission systems to help transfer electricity from power plants to consumers. In addition, transformers are also used in electronic devices such as chargers, televisions, power adapters, etc., to adjust the voltage to meet the requirements of different devices.
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Do you have UL listed?Yes, our transformer has UL listed. We have exported to America many pad mounted transformer,substation transformer and HV.
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