Zhejiang Jiangshan Hengli Electrical Co., Ltd. is one of the leading manufacturers and suppliers of distribution transformer used for lighting and industrial loads in China. If you're going to wholesale durable distribution transformer used for lighting and industrial loads made in China, welcome to get pricelist from our factory. All customized products are with high quality and low price.
Distribution transformers used for lighting and industrial loads are essential step-down power equipment in power distribution systems. It steps down high medium voltage from the power grid to standard low voltage, to provide steady and reliable power for all kinds of lighting systems, civilian electric appliances, factory motors, processing machines and general industrial loads.
This 25kVA three phase distribution transformer is used on the highway.The rated capacity of the transformer is 25kVA with ONAN cooling, the primary voltage is 0.69kV, the secondary voltage is 0.4 kV, the phase is three, they formed a vector group of Dyn11.
This transformer series adopts optimized core and winding design, featuring low no-load loss, low operating noise, small voltage fluctuation and strong overload capacity. It can stabilize output voltage effectively, prevent lights flickering and extend lighting service life. Meanwhile, it adapts to industrial loads with frequent start-stop, current surge and unstable power consumption, ensuring continuous and safe operation of industrial production equipment.
Main Technical Parameters
|
Item |
Technical Parameter |
|
Product Name |
25kVA distribution transformer used for lighting and industrial loads |
|
Rated Capacity |
25 kVA |
|
Phase Number |
Three Phase |
|
Primary Rated Voltage |
0.69 kV |
|
Secondary Rated Voltage |
0.4 kV |
|
Vector Group |
Dyn11 |
|
Cooling Method |
ONAN (Oil Natural Air Natural) |
|
Rated Frequency |
50Hz / 60Hz (optional) |
|
Tap Changer |
Off-circuit tap changer ± 2×2.5% |
|
Core Material |
Cold-rolled grain-oriented silicon steel sheet |
|
Winding Material |
Pure Copper / Aluminum optional |
|
Temperature Rise Limit |
≤65K |
|
No-load Loss |
Low no-load energy loss |
|
Load Loss |
Low operational load loss |
|
Noise Level |
Low noise for highway outdoor environment |
|
Short-circuit Impedance |
4% -6% optional |
|
Installation Environment |
Outdoor, highway roadside, open air |
|
Protection Grade |
IP00 / IP20 optional |
|
Working Altitude |
≤1000m |
|
Ambient Temperature |
-25℃ ~ +40℃ |
Application Scope

● Urban and rural power grid distribution
● Residential community, villa area daily power supply
● Street lighting, road engineering, park lighting projects
● Factory workshops, processing plants, industrial park general loads
● Shopping malls, hotels, office buildings, commercial complex
● Construction site temporary power supply
● Public facilities and municipal engineering projects
Product Features
Distribution transformers used for lighting and industrial loads are:
1.Low power loss, high energy efficiency, reduce long-term operation cost
2.Stable voltage regulation, anti-interference, no light flicker for lighting loads
3.Strong overload ability, withstand instantaneous inrush current for industrial equipment
4.Low running noise, comfortable working environment
5.Rigid structure, anti-vibration, durable for harsh working conditions
6.Multiple installation options: indoor & outdoor, ground and pole-mounted
7.Strict quality test, high safety performance, low failure rate

Testing & Quality Assurance
Each transformer undergoes strict testing procedures before delivery:
Routine tests (Factory Test)of transformer
1,Winding Resistance Measurement
2,Ratio Test (Voltage Ratio Measurement)
3,Transformer vector group test
4,Short-Circuit Impedance & Load Loss Test
5,No-Load Loss & No-Load Current Test
6,Insulation Resistance Test
7,Tests on-load tap-changer.
8,Oil pressure test on transformer to check against leakages past joints and gaskets


All products comply with IEC, ANSI, and other major international standards.
Certificates




FAQ
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