75KVA Pole-Mounted Transformer

The 75KVA Pole-Mounted Transformer from Guangbian is engineered for stable outdoor power distribution in residential communities, rural electrification projects, industrial parks, schools, hospitals, and commercial facilities. Designed with advanced insulation systems and durable oil-immersed technology, this transformer delivers reliable voltage regulation, low power loss, and long service life in various environmental conditions.

As a professional China transformer manufacturer with more than 20 years of experience, Guangbian specializes in producing high-quality pole-mounted transformers below 35KV for customers across Africa, Southeast Asia, Central Asia, South America, and the Middle East.

What is a 75KVA Pole-Mounted Transformer?

A 75KVA Pole-Mounted Transformer is a compact oil-immersed distribution transformer installed directly on utility poles to reduce medium-voltage electricity into low-voltage power suitable for homes, commercial buildings, and small industrial applications.

This type of transformer is widely used because it offers:

● Efficient power distribution

● Easy installation and maintenance

● Reduced land occupation

● Excellent weather resistance

● Stable long-term operation

The Guangbian 75KVA transformer is manufactured according to international transformer standards and can be customized for different grid systems and voltage requirements.

Capacity and Phase

Start with "75KVA, single phase" at the top of the transformer datasheet. KVA stands for kilovolt-amperes—a measure of apparent power. 75KVA is the maximum load this unit can handle. Key word: "can handle," not "must run at." In practice, keep the load around 80% of rated capacity. That extends the transformer's service life significantly.

A single phase transformer has one input phase and one output phase. It fits residential areas, street lighting, and small commercial setups. Three-phase units, on the other hand, serve factories and office buildings where 380V industrial power is required.

Voltage Parameters

Primary voltage: 4160 Grd Y / 2400V

This tells you what the high-voltage side can connect to. "Grd Y" means grounded wye connection—neutral is tied to earth. 4160V is the line-to-line voltage, 2400V is line-to-neutral. This is a common rating in North American distribution systems, which is why you'll often see 4160v transformer listed in specs for export markets.

The tap changer has 5 positions: +2.5%, 0%, -2.5%, -5%, -7.5%. When the incoming voltage fluctuates, you can adjust the tap to keep output stable. Position B or 2 marks the nominal setting.

Secondary voltage: 120/240V

This is the low-voltage output side. A single phase transformer typically delivers 120V or 240V. The 240V output handles bigger loads like AC units and water heaters. The 120V side? That's for lights and wall outlets. With both voltages in one unit, you don't need a separate step-down setup.

Materials and Workmanship

Winding material: Copper

Copper conducts better than aluminum, so it runs cooler and wastes less power. We build with copper at GUANGBIAN's China facility—costs more upfront, but the long-term reliability is worth it.

Core: Grain-Oriented Silicon Steel

Silicon steel is what makes the transformer work magnetically. "Grain-oriented" just means the crystals line up in one direction—this cuts magnetic losses. Result? No-load losses stay low, and efficiency goes up.

Cooling Method: ONAN

ONAN = Oil Natural, Air Natural. The oil moves on its own, pulling heat from the core and windings. No pumps. No fans. Fewer things to fail. For a pole-mounted unit in the middle of nowhere, that kind of simplicity counts.

Efficiency Metrics

No-load loss: ≤225W | Load loss: ≤750W | Impedance: ≤2.5%

No-load loss is what the transformer draws just sitting there, energized but unloaded. 225 watts is pretty low. Load loss happens at full capacity—750W is normal for this size class. The impedance, around 2.5%, affects short-circuit current and voltage regulation.

Excitation current ≤2.5% tells you the core quality is solid. It doesn't take much power to magnetize. These are the numbers you'll find on every GUANGBIAN transformer datasheet—we manufacture in China and test every unit before it leaves the factory.

Certification Standards

IEEE C57.12 series, ANSI C57.12.20

IEEE C57 is the transformer technical standard from the Institute of Electrical and Electronics Engineers. ANSI is the American National Standards Institute. When a unit meets both, you know the design and testing methods are up to international par.

Reading a transformer datasheet takes some practice, but it's a core skill for procurement. Still have questions? Reach out to GUANGBIAN's technical team. We manufacture at our China factory and can walk you through a one-on-one selection process.

Our Factory

Sheet metal workshop

Foil winding workshop

Winding workshop

Winding oven workshop

Transformer assembly workshop

Transformer commissioning workshop

Manufacturing Process

The production of each 75KVA Pole-Mounted Transformer follows strict manufacturing procedures:

● Transformer core cutting and stacking

● Coil winding production

● Tank fabrication and welding

● Vacuum drying process

● Transformer assembly

● Oil filling and sealing

● Electrical performance testing

● Final inspection and packaging

This integrated manufacturing system helps Guangbian maintain consistent product quality and cost competitiveness.

Contact Guangbian

If you are looking for a professional China transformer manufacturer and supplier, Guangbian can provide customized 75KVA Pole-Mounted Transformer solutions according to your project requirements.

Whether your project is for rural electrification, industrial distribution, public infrastructure, or renewable energy systems, our engineering team can support you with reliable transformer products and technical solutions.

Contact Guangbian today to get:

● Technical consultation

● Transformer specifications

● OEM & ODM support

● Factory quotation

● International shipping solutions