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300 KVA transformer

The Ultimate Guide to 300 kVA Pad Mounted Transformer

daelim 300 kVA Transformer

How Does 300 KVA Pad Mounted Transformer Do?

Pad Mounted Transformer has wide application, power plants, metallurgical plants, oil and gas companies, coal yards, bitcoin mining centers and more.

But please don’t ignore the transformers in our lives. For example, transformers that appear in schools, roads, downstairs of companies, and hotel yards, commonly known as residential pad mounted transformers.

Residential pad mounted transformer, as a form of distribution transformer, has the same function of daily lighting and providing electric power.

In the United States, residential pad mounted transformers are commonly used in capacities of 15kva, 25kva, 37.5kva, 50kva, 75kva, 100kva, 150kva, 167kva, 200kva,250kva and 300kva.

Since the transformer is a customized product, the exclusive residential pad mounted transformer can be customized for the customer according to the different needs of the customer.

Pad-mounted Transformer

We can provide you single phase and three phase pad mounted transformer
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Dry-type Transformer

Type：Cast resin; Rated Capacity: Up to 25MVA; Rated Voltage: Up to 36KV;
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Pole Transformer

TypeCSP type Frequency: 50/60Hz; Rated Power: 5~167kva
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Oil immersed transformer

Frequency: 50/60Hz Rated voltage:10kv, 20kv,30kv Rated Power: 400~2500kva
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Click below for quick review of 3 phase transformer

Who Are The 300KVA Pad Mounted Transformer Manufacturers?

There are hundreds of transformer manufacturers in the market that can produce 300kva transformers, such as established suppliers ABB, Schneider, Siemens; in the US and Canada, well-known manufacturers include Emerald Transformer, Sunblet-Solomon Transformer, Surplec, Triton Transformer etc.

Daelim Transformer has a team of professional engineers who can design and produce various types of 300kva transformers. With Chinese speed, fast delivery and competitive prices, Daelim has been focusing on transformers in the international market for nearly 20 years. Its transformer brand Daelim Belefic already has some influence in the North American market. And it has been listed as a transformer supplier in the US market.

Beijing Daelim Transformer has various professional certificates, SGS Test Report for pad mounted transformer, CESI Test Report for single phase pad mounted transformer, ISO certificate, also applying UL certificate at present.

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Are 300 kVA Pad Mounted Transformers Dangerous?

As an indispensable part of the power system, 300kVA Pad Mounted Transformers need regular inspection, testing, maintenance and adjustment work to avoid overload, short circuit and other phenomena and ensure safety.

For example, the outside of the box will say “DO NOT OPEN, YOU CAN BE BADLY HURT”

The inside of the cabinet will prompt “KEEP AWAY, DO NOT TOUCH EVERYTHING, YOU CAN BE BADLY HURT OR KILLED”

There is also a hint for the off-circuit switch, “OFF-CIRCUIT SWITCH OPERATE ONLY WHEN TRANSFORMER IS DE-ENERGIZED”

In addition to that, there are hints for welded container ” WELDED CONTAINER. IF NEEDED ARISES TO OPEN UNIT BY CUTTING WELD, FIRST PURGE GAS SPACE WITH NITROGEN TO REMOVE ANY EXPLOSIVE GASES AND KEEP NITROGEN FLOWING DURING ALL CUTTING OPERATIONS.” As long as you follow the warning signs, there is no danger.

Know more about One article to understanding more about earthing transformer

The Features Of 300kVA 3 Phase Pad-Mounted Transformer?

4.1 The overload capacity is strong, allowing 2 times of overload for 2 hours and 1.6 times of overload for 7 hours without affecting the service life of the box transformer.

4.2 The elbow-type plug connector is used, which can be very convenient for the connection of high-voltage three-phase five-wire cables, and can be used as a high-voltage load switch in emergency situations, which can be activated and plugged in induction.

4.3 Use double fuses for maintenance, plug-in fuses (BAY-o-net) are double sensitive fuses (temperature, current) to maintain the short-circuit fault caused by the secondary side of the box transformer.

The reserve system protection fuse (ELSP) protects the common faults generated inside the box to protect the high voltage side.

4.4 The transformer uses vegetable oil as high ignition point oil.

4.5 All components, such as fuses for maintenance of high-voltage load switches, are placed in the same fuel tank as the transformer coils and windings

Try for free Daelim helps you to know more about pole mounted transformer

 What Color Are 300KVA Pad-mounted Transformers?

Generally, the customer come from Canada or USA require munsell green or ANSI #70 Grey.

Daelim Transformer can paint as what customer requires.

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What Is Inside A Pad-mounted Transformer?

6.1 Pad-mounted transformer has shell, cable and various accessories, we will answer them one by one.

Generally speaking, the shell is generally made of carbon steel material, but if you have requirements for the shell, Daelim Transformer can also be made of 304L stainless steel or carbon steel body and stainless steel base.

6.2 Here, it should be noted that, do you need IEEE standard or CSA standard?

Because the most intuitive difference between IEEE standard and CSA standard is that the pad mounted transformer of IEEE Standard has a barrier, but the pad mounted transformer of CSA Standard does not.

6.3 You don’t have to worry about accessories, whether it’s CSA Standard or IEEEStandard, there won’t be much difference.

Usually accessories will have:

LIFTING LUG

PARKING STAND BRACKET

TANK COVER

LV BUSHING

VACUUM PRESSURE GUAGE

IDENTIFICATION TAG

ANTI-CONDENSATION MATERIAL

HV BUSHING WELL

GROUND BAR

NAME PLATE

FLAT PADLOCK DOOR

GROUND STRAP COPPER

DRAIN VALVE

FILL PLUG

PRESSURE RELIEF VALVE

ELSP FUSE

BAYONET FUSE

FOUR POSITION LOADBREAKER SWITCH

LB SWITCH NAME PLATE

TAP CHANGER

INSERT WITH DUST CAP

THERMOMETER

OIL LEVEL GAUGE

If there are unconventional accessories, such as sudden pressure relay, winding indicators with contacts, etc., you need to inform the sales engineer in advance.

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Can The 300KVA Single Phase Mounted Transformer Be Used As Residential Transformer?

In the United States, the Philippines, South America and other areas where ANSI/IEEE standards are used, there are green or gray square boxes at the entrance of our houses, parks, etc., these may be single phase pad mounted transformer.

It can be seen everywhere in our life. The single phase pad mounted transformer has daily lighting and power supply functions, and is also a Residential Transformer.

Read my article on Know More About How power transformer be manufactured, tested & delivered?

How About The Configuration Of Residential Transformer?

Generally speaking, the residential transformer can be as a very simple distribution transformer.

Because it’s configuration is very simple, include tank, oil, tap changer, drain valve…etc.

Generally speaking, a residential single-phase pad mounted transformer can be used as a very simple transformer.

Because its configuration is very simple, including fuel tank, oil, tap changer, drain valve…etc.

We talked about regular types above.

There are many accessories for users to choose, such as: ELSP Fuse, Bay-O-Net Fuse, Surge Arrester, and Dual-Voltage Switch, etc. Transformer oil can choose cost-effective mineral oil, or green mineral oil with high environmental protection and safety level.

Try for free information about the power transformer specification for tender in Canada

Will The 300kva transformer Testing According to CSA or IEEE standard?

Daelim Transformer’s answer is “Yes!”

A type test is a test made by the manufacturer to verify a design characteristic not covered by a routine test.

Upon request, the manufacturer shall provide a record of type tests to the purchaser at the time of order. The test data may be provided from tests performed on other units whose equivalence, with regard to each required test, is acceptable to the purchaser.

9.1 Standard type tests

The following are the standard type tests:

(a) resistance;

(b) temperature rise;

(c) impulse strength;

(d) radio-influence voltage;

(e) short-circuit;

(f) transformer integrity; and

(g) audible sound.

9.2 Dielectric tests

9.2.1 General

The transformer and cable entrance compartment assembly shall be of a type that has been tested to
demonstrate that it successfully withstands overvoltage tests equivalent to those required in CSA Clause 7.2 when equipped with such high-voltage accessories as may be provided by the manufacturer.

9.2.2 Applied voltage test

The applied voltage test shall be performed by applying, between each winding successively and the other winding(s) connected to ground, a voltage at 60 Hz from an external source, of the kV value specified. Such applied voltage shall be held constant for 1 min. This test shall not be performed on any winding that is permanently grounded.

9.2.3 Induced voltage test

9.2.3.1 Transformers with delta-connected high-voltage windings

For transformers with delta-connected high-voltage windings, the induced voltage test shall be performed by applying between the terminals of one winding, with the other winding open-circuited, a voltage of twice the normal voltage of the winding for 7200 cycles at one of the frequencies specified in CSA Standard.

9.2.3.2 Transformers with permanently grounded Y high-voltage windings For transformers that have a Y-connected high-voltage winding with the neutral terminal permanently grounded, the induced voltage test shall be performed by applying to the line terminals of one winding a voltage that will develop between the high-voltage line terminals a voltage equal to the values given under applied voltage in CSA Standard for 7200 cycles at one of the frequencies specified in CSA Standard.

However, in no case shall this voltage between the high-voltage line terminals be less than twice the rated transformer line voltage or more than 1000 V plus 3.46 times the rated transformer line voltage.

9.2.4 Impulse tests

The standard impulse tests shall consist of voltage applied to each winding, in accordance with  CSA Standard, in the following order: one reduced full wave followed by one full wave.

9.2.5 Temperature rise test

9.2.6 Short-circuit tests

9.2.7 Transformer integrity test

Let’s know learn more about the How to purchase a 10 mva substation transformer

What Kind Of Support If The 300KVA Transformer Has Any problem?

Daelim Transformer has exported electrical equipment over 16 years, entered North America market 4 years ago.

Because of the high quality with good performance, has the good reputation in North America.

Daelim has built their own after-sales center, our after sales team will support you for any problem

Keep on reading FAQ about residential transformer

How About The Warranty Time The 300KVA Transformer Manufacturer Will Give?

Daelim Transformer give customers 2 years warranty time, under normal use environment and temperature, the service life can be as long as 30 years or even longer.If you have any questions about the 300kva transformer, you can always contact the Daelim team to help you.

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Hello, I am Bin, General manager of Daelim which is a leading transformer manufacturer. If you have problems when you are looking for the equipment, what you need to do is tell us.
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