Basic Guide Of Single-phase Pad-mounted In The American Markets | Daelim Belefic

Thanks to our years of experience and our professional team, Daelim can support customized transformers according to our client's requirements. Daelim cares about the quality and the details of our transformers offering the best solution to our customers all over the world. In this article, we will introduce Daelim Pad mounted transformer and its accessories.

 

Each client requires different characteristics for the transformers they are asking for, and also different accessories. In this article, we will see the different pad mounted transformer accessories and how the price can vary according to customers' requirements.

 

If you want to learn more about the parts and components of Pad mounted transformer, check out this article.

 

In our previous articles, we usually talk about three-phase pad-mounted transformers, but there is another type of pad-mounted transformer, which is single-phase pad-mounted transformer. Single-phase Pad-mounted Transformer is also a very important part of the power distribution system. Daelim’s Single-phase Pad-mounted Transformer has already been sold to Canada for some utility projects. Let’s check out more details about Single-phase Pad-mounted Transformer through today’s article.

 

1. What Is The Difference Between Single-phase Pad-mounted Transformer and Three-phase Pad-mounted Transformer?

 

Three-phase Pad-mounted Transformers are mostly used in grid transmission and Industrial electricity.

 

Single-phase Pad-mounted Transformer is generally used in places where single-phase power is required for civil use, such as household appliances, etc., and its capacity is relatively smaller than three-phase pad-mounted transformer.

 

Difference Between Single-phase and Three-phase:

 

(1) The three-phase transformer inputs three-phase symmetrical AC power and outputs three-phase symmetrical AC power. It can provide three-phase power for industrial electrical equipment that requires three-phase power, such as three-phase AC asynchronous motors, etc. Electric household appliances, such as light bulb color TVs, etc., provide single-phase power supply three-phase four-wire power supply mode.

 

(2) The three-phase transformer inputs three-phase symmetrical AC power and outputs three-phase symmetrical AC power. It can provide three-phase power for industrial electrical equipment that requires three-phase power, such as three-phase AC asynchronous motors, etc. Electric household appliances, such as light bulb color TVs, etc., provide single-phase power supply three-phase four-wire power supply mode.

 

(3) However, a single-phase transformer inputs single-phase AC power and outputs single-phase AC power, but it can only provide single-phase power for loads that require single-phase power. If three single-phase transformers are connected to each other, they can also provide three-phase power as same as a three-phase transformer.

 

A single-phase transformer generally means that the primary coil is designed according to a single-phase single-coil, and the secondary can have one or more winding coils. Ideally, the total secondary power is about or equal to the primary total power. For example, the common primary connected to the low voltage of the mains is 220 volts, and its iron core is made into a mouth shape, a Japanese shape, a ring, and an R shape.

 

(4) In terms of structure, the most common ones are three-phase transformers and single-phase transformers. Three coils are required on the high and low voltage sides of a three-phase transformer, and the three coils on the high and low voltage sides are connected according to certain rules. This is the connection group of the transformer. There are many types, such as Yyn0, Dyn11, Yd11, etc., which can be Users who provide the power they need.

 

2. Technical Information of Single-phase Pad-mounted Transformer

 

Standard: ANSI/IEEE C57.12.00, C57.12.20, C57.12.38, C57.12.90; CSA C227.3-06

Rated Capacity: 15KVA, 25KVA, 37.5KVA, 50KVA, 75KVA, 100KVA, 167KVA.

High Voltage: 34.5KV, 24.94KV, 13.8KV, 13.2KV, 12.47KV, etc...

Low Voltage: 240/120V, 480/277V, 600/347V, etc...

Frequency: 50Hz; 60Hz

 

Main Accessories:

HV Bushings*2

LV Bushings*3

Tap Changer*1

Bay-O-Net Fuse*1

ELSP Fuse*1

Oil Level Gauge*1

Pressure Relief Valve*1

Thermomter*1

Fill Plug*1

Drain Valve*1

Ground Strap Copper*1

Grounding Spade Terminal*2

 

3. Single-phase Pad-mounted Transformer Sizes

 

Compared with three-phase pad-mounted transformer, single-phase pad-mounted has a smaller rated capacity, which brings smaller sizes. To make it look more hidden in the community, garden, and street.

 

Let’s take the biggest capacity: 167KVA as an example.

The height is 763mm; the width is 915mm, and the depth is 1202mm.

Oil weight 305L, total weight is 950kg.

 

4. Single-phase Pad-mounted Transformer Diagram

 

Here is a reference drawing of 167KVA-24.94Y-14.4KV/0.24(0.12)V single-phase pad-mounted transformer.

 

From this drawing, you can see the information such as sizes, weight, parts list, diagram of connecting, etc...

 

After confirming the advance payment from our customer, Daelim engineer team will prepare the production drawing for the customer and will send it to the customer for confirmation. Once we received the signed drawing from our customer, Daelim factory will start to purchase the materials and to manufacture them.

 

5. Single-phase Pad-mounted Transformer Cost

 

The production cost mostly depends on the following two points:

(1) Raw materials

(2) Accessories

 

Raw materials are mainly silicon steel sheet, copper/aluminum, and transformer oil.

 

The cost of silicon steel sheets, copper, and aluminum are fluctuated according to market conditions, so when the price of raw materials goes down, will be the best time to purchase your transformers.

 

The transformer oil cost mainly depends on the type of transformer oil.

 

In most cases, customers will choose mineral oil (Type II) as the cooling oil, it can work in the ambient temperature from -40℃ to +40℃. Mineral oil or synthetic insulating liquid with a fire point less than or equal to 300℃. And the cooling system will be ONAN.

 

In some other cases, customers will require vegetable oil as the transformer oil, the fire point is greater than 300℃, more safety and environmentally friendly. However, the cost will be higher than mineral oil. The cooling system of the vegetable oil transformer is called KNAN.

 

About the single-phase pad-mounted transformer accessories, Daelim has a good relationship with famous suppliers in China and will support us with friendly cost, fast delivery time, and the best quality. The bigger your order quantity is, the better accessories supply solution we will have.

 

What is special is the transformer tank of single-phase pad-mounted transformer. Due to the craftsmanship of single-phase pad-mounted transformer is harder than three-phase pad-mounted transformer, so the lead time will also be a little bit longer than three-phase pad-mounted transformer.

 

6. What Is The Safe Zone Of A Single-phase Pad-mounted Transformer?

 

As we see every day in our front garden, a single-phase pad-mounted transformer is very necessary and close to our life. So is it safe to live with a single-phase pad-mounted transformer in our garden? What is the safe zone around this big green box?

 

The big green single-phase pad-mounted transformer seen around the city are used to lower high voltage energy into the standard household voltage used to power electronics, appliances, and lighting. Unlike overhead lines and substations, transformers are not protected. While electrical equipment may appear safe to use as workbenches and climbing obstacles, it can still pose a risk to anyone who comes into contact with it. It is always recommended that members observe safety measures.

Landscaping and fencing must not block access to electrical equipment. Despite the temptation to conceal transformers with landscaping, please remember that crews need at least 10-feet of clearance at the opening of a pad-mounted transformer and four feet on the rear and sides of the housing. Working with energized equipment requires special tools that can only be used at a distance of this size. As well as providing crews with a safe environment, it ensures they are able to move about should problems occur.

 

A greater number of pad-mounted transformers are being installed in newer subdivisions and residential developments - and in many cases, they are located on consumer properties as well. Secondary lines can extend underground from these transformers in several directions. Primary high voltage lines connect these transformers with the high voltage lines. If you're planning on planting shrubs, trees, or fence posts, installing sprinkler systems, or digging anywhere near a transformer, remember this. Before you dig, remember to call 811 to locate utility lines so your project doesn't disrupt emergency services, cause serious injury, or worse.

 

The clearance between a transformer near a building's vertical surfaces should be 4ft, assuming no windows between the grade and 18ft.

 

WHY CHOOSE DAELIM?

As referenced before, Daelim Industrial has over 15 years of involvement with the transformer business and commodities items to the north of 30 nations all over the planet. These minutes provided us with the experience of having an expert specialized group and a creative group. With this 15-year experience, we have gotten comfortable with global norms and are capable all the time to modify plans and creations as indicated by the client's solicitation.

Likewise, our plant of transformers is situated in China, so we have a great natural substance store network and we can continuously give cutthroat costs to our clients all over the planet.

Daelim has a rich encounter providing numerous activities in American nations such US and Canada, we are qualified with CSA authentication, SGS test report, we proposition to our clients a total after-deals establishment groups in Canada, USA, among different nations.

Click here to know more about Daelim team. And welcome to share your projects with us! Contact us anytime.