Pole Mounted Transformer Manufacturer
High-Reliability Pole Mounted Transformer Manufacturer
Engineered for continuous operation in severe overhead distribution environments, GE Transformer delivers premium conventional and Completely Self-Protected (CSP) transformers. Fully compliant with IEEE, IEC, and CSA standards, our units exceed global efficiency mandates while minimizing maintenance overhead and installation footprint.
Core Engineering Advantages:
- Integrated CSP Protection: Natively incorporates high-voltage surge arresters, low-voltage circuit breakers, and internal fuses. This 3-in-1 design eliminates external protective hardware and significantly reduces installation costs.
- Superior Mechanical Integrity: Features 100% external weld tracking, recessed tank bottoms, and uniform torque-tightened Nitrile (NBR) gaskets to guarantee a permanently sealed, leak-free structural enclosure.
- Advanced Core Design: Utilizes EPRI-recommended interlaced cores in premium Grain-Oriented Silicon or Amorphous steel, specifically engineered to resist low-side voltage surges and minimize no-load losses.
- Extreme Environment Ready: Tank surfaces exceed industry standards with optional ISO 12944 C5-M marine-grade anti-corrosion finishes. Compatible with standard mineral oil or FR3 biodegradable fluid for heightened fire safety.
Pole Mounted Transformers
Pole Mounted Transformer Accessories
CSP-Specific Attachments
Our Completely Self-Protected (CSP) models feature an integrated three-tier protection system, eliminating the need for external cut-outs and safeguarding both the transformer and the grid.
High-Voltage Surge Arrester: Externally mounted to protect the transformer from lightning strikes, switching operations, and other high-voltage transients by safely shunting surges to the ground.
Internal Current-Limiting Fuse: Submerged in oil, this primary protective link prevents winding damage by isolating the transformer from the feeder during severe internal faults or short circuits.
Low-Voltage Circuit Breaker: Mounted internally above the windings. It provides secondary over-temperature and low-oil-level protection. Features an external operating handle, overload reset button, and an indicator light. Upon tripping, it can allow a safe percentage of current to pass for temporary emergency power restoration.
Standard Fittings
Every conventional and CSP pole mounted transformer from GE Transformer is equipped with the following premium baseline components to ensure long-term stability and safety.
High-Voltage Bushings: Made of premium porcelain. Connects the high-voltage windings to external lines, providing critical insulation, weather protection, and heat dissipation. Available with eye-bolt or clamp-type terminals (1 or 2 units).
Low-Voltage Bushings: Designed in polymer or porcelain. Custom-configured with spade or clamp-type terminals to secure low-resistance electrical connections based on specific client requirements.
Pressure Relief Device (PRD): Automatically regulates internal gas pressure. It vents hazardous pressure buildup during abnormal thermal events to maintain safe operational states and ensure structural reliability.
Oil Fill Valve: A dedicated port utilized for safely injecting dielectric fluid into the transformer tank during manufacturing or maintenance.
Drain Valve with Sampling Device: Dual-purpose valve used to discharge trapped air and moisture, remove internal sediments, and extract oil samples for DGA (Dissolved Gas Analysis) testing to ensure optimal fluid quality.
Heavy-Duty Tank & Cover: Constructed from carbon steel or stainless steel, featuring a recessed tank bottom and 100% continuous external welds for maximum mechanical strength and corrosion resistance.
Lifting & Support Lugs: CSA-compliant lifting lugs designed to allow hoisting while the unit is strapped to a pallet. Includes Type A support lugs (10-50 kVA) or Type B (75-167 kVA) for secure pole mounting.
Internal Oil Level Indicator: Provides a direct visual reference of the dielectric fluid level inside the sealed tank.
Grounding Provisions: Includes reliable tank grounding devices, connectors, and low-voltage neutral grounding straps.
Laser-Engraved Nameplate: Stainless steel permanent identification plate, strictly compliant with IEEE C57.12.70 standards.
Optional Accessories
To adapt to specific project requirements, we offer a comprehensive selection of customizable engineering components.
Externally Operated Off-Circuit Tap Changer (OCTC / DETC): A manual rotary switch allowing field engineers to adjust the primary voltage ratio without opening the tank. Must be operated in a completely de-energized state.
External Dual-Voltage Switch: Enables rapid, seamless switching between two primary voltage classes to accommodate grid upgrades.
Internal Fault Detector (IFD): An advanced diagnostic sensor that provides immediate visual indication of internal arcing or mechanical faults.
Dielectric Fluids: Choice of standard electrical-grade mineral oil or environmentally friendly FR3 biodegradable ester fluid for enhanced fire safety and extended insulation life.
Comprehensive Monitoring Gauges: Ruggedized dial thermometers, liquid level indicators, and pressure/vacuum gauges for real-time operational monitoring.
Wildlife Protectors (Bird Guards): High-dielectric polymer covers installed over high-voltage terminals to prevent phase-to-ground flashovers caused by animal contact.
Pole Mounted Transformer Parameters
| No. | Item | Specification |
| 1 | Rated Power |
Single phase pole mounted transformers ranging from 15 kVA to 333 kVA Three phase pole mounted transformers ranging from 15 kVA to 500 kVA |
| 2 | Frequency | 50 Hz / 60 Hz (customizable) |
| 3 | High Voltage (HV) | 7.2 / 7.62 / 13.2 / 13.8 / 14.4 / 22.9 / 24.9 / 33 kV, or others |
| 4 | Low Voltage (LV) | 120/240 V, 220/127 V, 380/220 V, 240/480 V, 347/600 Y, 277 V, 347/600Y, or others |
| 6 | Connection Group | Ii0/Ii6 |
| 7 | Winding Material | Copper/Aluminum |
| 8 | Cooling Type | ONAN / KNAN |
| 9 | Rated Impedance Voltage | 2%～4% or customized |
| 10 | Temperature Rise | 55-65°C |
| 11 | Altitude | ≤1,000m or Customized |
| 12 | Ambient Temperature | -40°C to +45°C (altitude ≤ 1000m; high altitude versions available) |
| 13 | Protection Level | Outdoor, Hermetically Sealed Tank, IP54/IP55 |
| 14 | Noise Level | ≤ 50 dB (measured at 1 meter) |
| 15 | Installation Type | Pole-Mounted (Horizontal or Vertical mounting) |
| 16 | Accessories | HV Bushing, LV Bushing, Nameplate, Support lug, Tap changer, tank ground, Pressure relief, Cover clamp, Lift lug, Copper strip, Surge arrester, Current limiting fuse, Low voltage circuit breaker, or others |
| 17 | Applicable Standards | IEC60076，ANSI C57, IEEE, CSA |
| 18 | Min. order quantity | ≧ 1 set |
| 19 | Warranty | Typically one year, depending on the client’s specific needs |
| 20 | Delivery Time | Generally, it is 20-30 days. It is according to the quantity. |
Pole Mounted Transformer FAT & QC
At GE Transformer, quality assurance is deeply integrated into our manufacturing process. Every single pole mounted transformer undergoes a stringent series of electrical, thermal, and mechanical diagnostics in our state-of-the-art testing facility before delivery.
All testing protocols strictly adhere to IEEE C57.12.90 and IEC 60076 standards. Upon completion, we provide a comprehensive, formally documented Certified Test Report (FAT) signed by our chief engineers, ensuring complete transparency and peace of mind for your project.
1. Routine Tests (Performed on 100% of Units)
Every unit is thoroughly validated against its design specifications to guarantee safe and efficient field operation.
Ratio, Polarity, and Phase Relation: Verifies the exact voltage ratio accuracy and ensures the correct vector group configuration.
Winding Resistance Measurement: Checks the integrity of all internal connections and winding performance.
Insulation Resistance Measurement (Megger Test): Evaluates the dielectric quality of the insulation system to effectively prevent electrical leakage.
No-Load Loss and Excitation Current: Measures the core’s energy efficiency and validates compliance with global DOE/CSA energy mandates.
Load Loss and Impedance Voltage (%): Determines the transformer’s efficiency and voltage regulation capabilities under full-load conditions.
Applied and Induced Potential Tests: High-voltage dielectric withstand tests to verify the insulation’s ability to endure operational electrical stresses.
Pressure and Leak Testing: Each sealed tank undergoes rigorous pressure and vacuum testing to ensure the structural integrity of welds and gaskets, guaranteeing a leak-free lifespan.
2. Type Tests & Optional Tests
To validate the fundamental engineering of specific design series or upon client request, we conduct advanced performance testing.
Full-Wave Lightning Impulse Test (BIL): Simulates lightning strikes to ensure the interlaced core and insulation can safely withstand extremely high-voltage transients.
Temperature-Rise Test: Operates the unit at maximum continuous load to confirm that thermal limits (e.g., 55°C / 65°C rise) are strictly maintained.
Sound Level Test: Verifies that operational acoustic emissions meet low-noise regulatory standards for urban or residential deployment.
Pole Mounted Transformer Drawing
Pole Mounted Transformer Packaging and Shipment
Why Choose GE Transformer
Quality Control: Quality is a core value of GE Transformer. We conduct Factory Acceptance Testing (FAT), type testing, and third-party inspections to ensure superior quality. We strictly adhere to the ISO 9001 quality management system, committed to providing our customers with the highest quality products.
Professional Team: Our team comprises highly skilled professionals dedicated to responding quickly to customer needs. All GE Transformer team members receive systematic training and continuously improve their capabilities through rigorous quality standards and practices. Our commitment to customer service, product innovation, engineering excellence, and social and environmental responsibility makes us a trusted partner in the global power industry.
Certifications
- ISO9001：2015
- CE Certifications:
- UL Certifications:
- CSA Certification:
- CNAS Certification:
Competitive Market Pricing:Leveraging years of industry experience, GE Transformer integrates high-quality resources across R&D, production, procurement, transportation, and service, achieving effective cost control.
Fast Delivery: Strong production capacity, multiple freight partners, and a professional pre-sales and after-sales team, adhering to the “customer first” philosophy, provide customers with fast delivery and usage services.
FAQ
1. What is the main difference between a conventional and a Completely Self-Protected (CSP) pole mounted transformer?
A conventional transformer requires external pole-mounted protective devices, such as drop-out fuses and external surge arresters. A Completely Self-Protected (CSP) transformer natively integrates high-voltage surge arresters, internal current-limiting fuses, and a low-voltage secondary circuit breaker directly within or on the tank. This highly integrated design eliminates the need for external cut-outs, significantly reducing installation time, footprint, and overall deployment costs.
2. How do GE Transformer units ensure longevity in highly corrosive coastal or marine environments?
For projects located in areas with high salt spray or extreme humidity, we upgrade the standard tank finishing process to an ISO 12944 C5-M marine-grade anti-corrosion coating system. Combined with our 100% continuous external weld tracking, recessed tank bottoms to prevent moisture accumulation, and premium Nitrile (NBR) gaskets, our transformers are engineered to deliver a leak-free and rust-resistant lifespan even in the most aggressive atmospheric conditions.
3. Are your pole mounted transformers compatible with environmentally friendly dielectric fluids?
Yes. While our standard units are filled with premium electrical-grade mineral oil, we fully support the use of biodegradable ester fluids, such as FR3 fluid, as an optional accessory upgrade. FR3 fluid significantly raises the flash point for enhanced fire safety, extends the operational life of the insulation paper, and provides superior environmental compliance for eco-sensitive installation sites.
4. Can you customize the impedance, load losses, and no-load losses to meet our specific local utility standards?
Absolutely. GE Transformer operates a fully integrated engineering and manufacturing facility. Our technical team can optimize the core-and-coil design—utilizing high-grade grain-oriented silicon steel or amorphous metal—to precisely match your required short-circuit impedance and efficiency metrics. We routinely design units that exceed stringent global efficiency mandates, including the U.S. DOE 2016 and CSA standards.
5. Do you offer dual-voltage configurations for grids undergoing voltage upgrades?
Yes, we frequently design dual-voltage pole mounted transformers equipped with an external dual-voltage switch. This allows utility personnel to easily toggle between two primary voltage classes (e.g., from 12.47 kV to 24.94 kV) without opening the transformer tank or performing internal rewiring. It is an ideal solution for future-proofing grid infrastructure during systemic voltage transitions.
6. What testing documentation is provided upon delivery of the transformers?
Every transformer that leaves our facility undergoes rigorous routine testing in accordance with IEEE C57.12.90 and IEC 60076 standards. Upon dispatch, we provide a comprehensive Certified Test Report (Factory Acceptance Test – FAT) signed by our chief engineers. This official documentation details the results of ratio, winding resistance, dielectric withstand, and loss measurements, serving as a guarantee of quality and compliance for your project records.
7. What is the typical lead time for a bulk utility-scale order?
Standard production lead times typically range from 4 to 6 weeks after the final approval of the technical drawings, depending on the specific capacity, voltage class, and order volume. For urgent utility projects or customized designs requiring specialized optional accessories, our project management team will provide a precise, transparent manufacturing schedule during the quotation phase.