Three-phase Pole Mounted Power Transformer

Three-phase pole-mounted transformer power ratings: 25kVA, 45kVA, 63kVA, 100kVA, 200kVA,315kVA,400kVA and 500kVA.

 

3-phase transformers convert AC voltage. They have a delta primary and a Y secondary. The secondary side can provide single-phase or three-phase power.

 

25 KVA-500 KVA three phase pole mounted transformer are widely used in urban and rural power distribution systems in North America, South America, and Southeast Asia, and are suitable for industrial, agricultural, commercial, and residential areas in the distribution network. They are usually installed on utility poles, effectively saving land resources while providing reliable power transmission. Specifications range from 25 KVA to 500 KVA, with the characteristics of high efficiency, low loss, and strong durability. They can operate stably in various environments and adapt to the power needs of different regions.

 

Three-phase Pole Mounted Power Transformer parameters

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- Input voltage: 6KV,6.6kv,10kv,11kv,15kv,20kv

- Output voltage: 0.4kV 0.415 kv 0.420kv 0.430kv 0.440kv,0.480kv
- Capacity: 25-500 kva,25kVA, 45kVA, 63kVA, 100kVA, 200kVA,315kVA,400kVA and 500kVA
- Frequency: 50/60 HZ
- Remark: voltage, capacity, frequency, connection group and loss can be customized according to customer requirements

 

Primary Voltage Level,up to 14,400 V

· BIL, 60 to 125 kV

· Secondary Voltage Level 208Y/120,480Y/277,240,480

· 240 delta 120 mid-tap,480 delta 240 mid-tap

· Mild steel or Stainless Steel tank

· Mineral or seeds oil on request

· Vacuum or pressure Indicator relieve Valve

· Optional lighting arrester

· Various tank colors on request

· Custom name plate

Three phase pole mounted transformer are critical components in the distribution of electrical power, especially in residential and light commercial applications. Unlike ground mounted transformers, these are installed on poles, making them a practical solution for areas where space constraints or environmental considerations prevent ground installations. They are an essential part of power distribution networks, converting high-voltage electricity from power lines to a lower voltage suitable for use in homes and businesses.

 

25 KVA-500 KVA Three Phase Pole Mounted Transformer Structure

• Core: The core of the transformer is typically made of laminated silicon steel sheets, usually in an E-shape or rectangular form, with high magnetic permeability. The core is divided into several limbs, each wrapped with coils.

 

• Windings: Inside the transformer, there are three windings corresponding to the three phases of the electrical grid (Phase A, Phase B, and Phase C). Each winding consists of a primary (high-voltage) winding and a secondary (low-voltage) winding, typically made of copper or aluminum wires and insulated to prevent short circuits.

 

• Oil Tank: The transformer is often immersed in insulating oil, housed within an oil tank. The oil helps in cooling the transformer and provides additional insulation.

 

• Radiator: To ensure proper operation, the transformer includes a radiator (often fins or tubes) to dissipate heat and maintain the transformer within a safe temperature range.

 

• Enclosure and Accessories: The enclosure protects the internal components, and accessories include high-voltage and low-voltage terminals, grounding devices, lightning arresters, and more.

 

Common kVA Capacities of Three Phase Pole Mounted Transformer

When it comes to three phase pole mounted transformer, kVA (kilovolt-ampere) rating is a key factor that determines the capacity of the transformer. At HENAN GNEE ELECTRIC CO., LTD.-a leading transformer manufacturer in China, we offer a range of standard kVA capacities to meet the diverse needs of our customers:

15 kVA: Suitable for small residential areas or light commercial applications.

25 kVA: Commonly used in slightly larger residential zones or small businesses.

50 kVA: Ideal for areas with higher electricity demands, such as larger residential complexes or moderate commercial establishments.

75 kVA: Typically used for larger commercial buildings or small industrial setups.

100 kVA and above: Designed for more demanding applications, such as industrial facilities or large commercial operations.

Three-phase Pole Mounted Power Transformer FAQ

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What is a three-phase pole-mounted power transformer?
It is an outdoor electrical transformer mounted on utility poles, designed to step down high-voltage electricity to lower voltages suitable for distribution to residential or commercial areas.

 

What are the common applications of pole-mounted transformers?
They are widely used in rural and urban power distribution networks to supply electricity to homes, businesses, and small industries.

 

What voltage ratings are typical for pole-mounted transformers?
Common primary voltages range from 11 kV to 33 kV, while secondary voltages are typically 400/230 V for three-phase distribution.

 

How is a pole-mounted transformer cooled?
Most pole-mounted transformers use oil-immersed natural cooling (ONAN) for heat dissipation.

 

What safety features are included in pole-mounted transformers?
They often include protective devices such as surge arresters, pressure relief valves, and fault indicators to ensure safe operation.

 

How long do pole-mounted transformers typically last?
With proper maintenance, they can operate efficiently for 25 to 40 years, depending on load conditions and environmental factors.

 

What maintenance is required for pole-mounted transformers?
Regular inspections, oil testing, and checking for leaks or corrosion are essential to ensure reliability and longevity.

 

Can pole-mounted transformers be used in harsh weather conditions?
Yes, they are designed to withstand rain, wind, and moderate temperature variations, but extreme conditions may require additional protection.

 

What are the advantages of pole-mounted transformers over pad-mounted transformers?
They save ground space, reduce vandalism risks, and are easier to install in areas with limited land availability.

 

How is a faulty pole-mounted transformer replaced?
Utility crews use specialized equipment like bucket trucks to safely remove the old transformer and install a new one without prolonged power interruptions.