The three-phase overload transformer is composed of a three-phase transformer and a heat sink connected to the transformer at the front and rear ends of the transformer.
The design of the three-phase overload transformer needs to take into account specific conditions such as the ability to withstand short circuits, the overload capacity, and the temperature rise limit in the product performance. It reflects the characteristics of the transformer product with high overload capacity.
A distribution transformer is a kind of isolation transformer.
The main use of this transformer is to alter voltages from high to low, like 240/120 V, to use in electric power distribution.
There are different types of transformers in the distribution system, such as single-phase, three-phase, underground, pad-mounted, and pole-mounted transformers.
The most common kind of distribution transformer used is the single-phase oil-filled, pole-mounted transformer.
They are normally referred to as a “pole-top” or “overhead” transformer. Overhead transformers differ in their physical size and how they connect to produce different secondary voltage outputs.
The functions of a three-phase system, like a standard three-phase system, are to generate and distribute electricity.
It generates power on a larger scale to meet the demands of industries and commercial establishments.
These transformers are used to change voltages of electrical systems with three phases.
The three types of configurations are star-star, delta-delta, star-delta, and delta-star.
Technically, three-phase overhead transformers are just overhead transformers with a three-phase system.
The only key differences of a three-phase overhead transformer from a standard three-phase system include sizes/rating, mounting locations, and applications.
Standard three-phase overhead transformer sizes are 3, 6, 9, 15, 30, 45, 75, 150, 225, 300, 500, 750, and 1,000 (kVA)
To get the specific sizes, it is better to consult your supplier.
In addition, be careful not to mention specific patents, products, and brand names not tied to the client’s company (Daelim).
In a single-phase power system, power lines are the input source.
But there is only a single primary and one secondary winding required to achieve the voltage transformation.
The single-phase transformer uses these two windings to transform the voltage.
A single-phase transformer has various models that differ in horsepower range, taps, mounting types, dimensions, kVA, and shipping weight.
Three-phase powers work differently because they are generated by rotating three windings or coils through a magnetic field within a generator.
The three windings are apart by 120 degrees.
They generate power as they rotate through the magnetic field. The generated power is sent out on three different lines, hence the term “three-phase” power.
Standard single-phase overhead transformer sizes are: 5, 10, 15, 25, 37.5, 50, 75, 100, and 167 (kVA).
Common electrical ratings of a single-phase power:
Are you looking to purchase a three-phase transformer? If you are, then you should know about the advantages and disadvantages of three-phase transformers.
When it comes to purchasing a transformer, it is important to know everything about it.
The three-phase transformer is no exception. Here are some of the disadvantages of three-phase transformers so you can be informed.
Sizing your transformers is simple. It uses a straightforward formula to generate your kVA requirements from the current and voltage of your electrical load.
Most kVA ratings are whole numbers, and most of them come in multiples of five or 10 to 15, 150, 1,000 kVA, and so on.
If your transformer is rated at 1.5 kVA and you want it operated at 25 volts, multiply 1.5 by 1,000 to get 1,500 and divide 1,500 by 25 to get 60.
The top line of the utility pole is the static wire.
The static wire is like a lightning conductor, breaking off any excess charges from the power lines when lightning strikes during a thunderstorm.
This wire is connected to the grounding conductor.
Primary and secondary lines are located under the MGN.
The primary line carries electricity to a substation at 5 to 30 kV. Being supported by crossbars on older types of utility poles.
The secondary line is also named the secondary service drop.
The service drop leads from utility pole lines to a house. It consists of three-conductor wires.
Two of them are insulated wires carrying electricity from the transformer.
The third one is a bare neutral wire connecting to the grounding wire.
These lines have voltages of 120 to 240 volts.
Below the static line, there are three power lines known as the transmission lines.
Transmission lines are typically labeled as “A,” “B,” and “C”.
They can conduct high voltage electricity from a power plant to a substation.
A substation decreases the amount of voltage from 69 to 500 kVdown to five to 30 kV.
Power is then sent out on feeder lines connected to buildings and homes.
In most suburban neighborhoods, the distribution lines are underground.
There are green transformer boxes at every house or two.
Two wires run out of the transformer, and three wires run to the house.
The two from the transformer are insulated. Meanwhile, the third one is bare.
Bare wires are the ground wires. These two insulated wires each carry 120 volts.
DAELIM’s professional advice is to get the best-quality three-phase distribution transformers for safety purposes, lesser maintenance, longevity, and overall acquire the best value out of you or your company’s money
This is why DAELIM, one of the top companies in the world specializing in three-phase distribution transformers, will provide and share with you their 15 years of expertise to be knowledgeable of three-phase distribution transformers, pole-mounted transformer locations, and pole-mounted transformer specifications. Contact them today to learn more.
The common three-phase overload transformers on the market are mainly oil-immersed transformers. The limitation of specific values can be involved according to your requirements.
Daelim has a professional transformer design and production team. They have gone through more than fifteen years of work and can perfectly fulfill your needs.
ELECTRIC, WITH AN ENGE-- DAELIM BELEFIC