Product Introduction
Hozee Electric specializes in manufacturing 25 Kva Transformer Pole Mounted. Our 25 Kva Transformer Pole Mounted is crafted from high-quality high-magnetic-permeability oriented silicon steel and high-conductivity electromagnetic wire, which can effectively reduce current by 30% and noise by 5-10 dB. Through the adoption of premium materials and strict quality control measures, our single-phase transformers boast advantages including low loss, low noise, high energy efficiency, strong mechanical strength, impact resistance, and easy installation and maintenance, winning unanimous recognition from customers. These transformers are widely applied in rural power grids, remote mountainous areas, scattered villages, agricultural production, lighting, and daily electricity consumption scenarios.
Scope of Supply
Product: Single Phase Pole Mounted Transformer
Number of Phases: Single Phase
Rated Power: Up to 333 kVA Single Phase Transformer
Primary Voltage: 24900-13800-13200V/14400-7970-7620V
Secondary Voltage: 120/240V, 240V/480V
Customizable Production: Yes
Customizable production
Different climatic environments and application scenarios impose higher requirements on transformer models and types, greatly restricting the use of conventional models. Our company owns a professional technical team with over 10 years of experience, which can accurately match the most suitable transformer according to the power demand proposed by customers. From requirement confirmation to design drawing finalization, it only takes 3 working days, and the production cycle is 20% shorter than that of peers, ensuring timely product delivery without delaying your project schedule.
Technical Specification for Single phase Transformer
|
Model |
TR D1-25-13800-120/240V |
|
Type |
single phase transformer |
|
Rated power |
25KVA |
|
Execution standards |
IEEE.C57.12.00 / IEC60076 |
|
Frequency |
60HZ |
|
Phase |
single |
|
INPUT VOLTAGE |
13800V |
|
Output voltage |
120/240V |
|
No-load loss |
80W |
|
No-load current |
1.48% |
|
Load loss |
290W |
|
Impedance |
2±10% |
|
Noise |
48DB |
|
Bil |
95KV/38kv |
|
Tank color |
ANSI 70 gray |
|
Cooling method |
ONAN |
|
Iron core |
oriented silicon steel |
|
Winding |
copper |
|
Tap changer |
NLTC |
Transformer Process Flow Diagram
Our 25 Kva Transformer Pole Mounted adopts a standardized production process, covering core winding, hydraulic shaping, high-temperature annealing, winding manufacturing, assembly, testing, and packaging, ensuring consistent product quality.

Transformer drawings
In the design of our single-phase 25 Kva Transformer Pole Mounted, while ensuring electrical parameters such as no-load loss, we further strengthen the anti-corrosion and moisture-proof performance of the transformer. Detailed drawings (PDF/CAD formats) are available upon request, including structural diagrams and installation guidelines.

Core
The iron core of our single-phase transformer is wound by automatic equipment, shaped by hydraulic equipment, and finally subjected to high-temperature annealing. This process eliminates mechanical stress caused by processing and restores the low-loss and high-magnetic-induction performance of the silicon steel sheets, laying a solid foundation for the transformer's stable operation.


Experimental testing
Every 25 Kva Transformer Pole Mounted undergoes strict experimental testing before leaving the factory, including no-load loss test, load loss test, impedance test, noise test, insulation test, and lightning impulse voltage test, ensuring all performance indicators meet the specified standards.


Transformer selection criteria
The selection of transformers requires comprehensive judgment based on core parameters and scenario requirements:
Capacity Matching: Select the rated capacity (kVA) based on 1.2-1.5 times the total load power to avoid overload. For scenarios with a total load power of 80kW, a 100-125kVA transformer is recommended.
Voltage Adaptation: The input/output voltage must match the power grid and load. Single-phase transformers should focus on civilian voltages such as 110V/220V, while three-phase transformers are suitable for 380V industrial electricity, with voltage fluctuation tolerance also taken into account.
Environmental Adaptation: Choose high-temperature-resistant insulation materials (such as H-class insulation) for high-temperature environments; strengthen moisture-proof and anti-corrosion design for humid or corrosive environments (e.g., anti-corrosion enclosures are required for rainforest areas in Guyana).
Energy Efficiency and Safety: Prioritize first-class energy efficiency products to reduce losses, while ensuring short-circuit impedance, insulation level, etc., meet safety standards. For example, winding insulation must withstand 1.2 times the rated voltage impact.
Only by combining load characteristics and environmental conditions can an economical and reliable transformer be selected.
FAQ
Q: What are the types of transformers?
A: According to the number of phases, it can be divided into single-phase and three-phase transformers; According to their purposes, there are power transformers, specialized power transformers, voltage regulating transformers, measuring transformers (such as voltage transformers, current transformers), etc; According to the cooling method, there are oil immersed and air cooled types; According to the insulation medium, there are oil immersed transformers, dry-type transformers, gas insulated transformers, etc.
Q: Why can't transformers operate under overload?
A: Overload operation refers to exceeding the current value specified on the nameplate. In special circumstances, short-term overload should not exceed 30% of the rated load in winter and 15% in summer. Long term overload can accelerate the aging of transformers, shorten their service life, and even cause malfunctions.
Q: What factors affect the service life of transformers?
A: Affected by manufacturing quality (high-quality materials and precision processes can extend lifespan), load conditions (overload accelerated aging, rated or light load helps maintain lifespan), maintenance management (regular maintenance can prevent failures), and environmental factors (high temperature, high humidity, pollution, etc. accelerate insulation material aging).
Q: What are the important technical data on the transformer nameplate?
A: There are rated capacity (output capacity under rated state), rated voltage (primary and secondary coil terminal voltage), rated current (line current allowed to pass through primary and secondary coils for a long time under rated capacity and allowable temperature rise), voltage ratio (ratio of rated voltage of primary and secondary coils), wiring method (single-phase transformers have one set of high and low voltage coils, three-phase transformers have Y/△ type, etc.), as well as rated frequency, number of phases, temperature rise, impedance percentage, etc.
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