3 Phase Pad Mounted Transformer

Our dead-front transformer comes with 200A and 600A separate bushings (bushing well + bushing insert) or a one-piece bushing. In the case of the dead-front transformer with a 200A HV bushing, it can be fully shielded and insulated for the load-break elbow connector connection to the underground cable. For the dead-front transformer with a 600A HV bushing, the current needs to be converted into 200A through the T-body dead-break connector before being connected to the underground cable via the load-break elbow connector.

Daelim Transformer pad mounted transformer projects

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3 Phase Pad Mounted Transformer Sizes

The sizes of 3 phase pad-mounted transformers vary based on power ratings, primary and secondary voltages, materials, etc. The table below provides specific dimensions of some pad mounted transformer projects completed by Daelim Transformer for your reference only.

Remind

If you need to know the specific size of the transformer you require, please send the transformer specifications to pingruidan@daelim-electric.com or pingruidan@gmail.com to obtain the information.

3 Phase pad mounted transformer grounding

CSA Standard Grounding Provisions

According to CSA standards, grounding provisions for 3-phase pad-mounted transformers include two vertically mounted earth spade terminals welded to the tank wall at a height of at least 150 mm at or above sill level. One terminal is placed on the high-voltage side and one on the low-voltage side. For GrdY transformers, the high-voltage side terminals shall be designated and marked H0. Both terminals shall be unpainted, made of stainless steel, with a width of not less than 40 mm and a thickness of not less than 6 mm. Each terminal is provided with two 14 mm (9/16 inches) holes, spaced 44.5 mm apart.

IEEE Standard Grounding Provisions

For transformers of 500kVA and below, two steel pads shall be provided, each having a 1/2% inch 13 UNC tapped hole and a minimum thread depth of 11 mm (0.44 in.).

For transformers above 500kVA, two unpainted copper-faced steel or stainless steel pads measuring 51 x 89 mm (2.0 x 3.5 in) each shall be provided. Each pad has two holes spaced 44 mm (1.75 in) on centers and tapped for a 1/2%-inch 13 UNC thread. The copper finish shall be not less than 0.5 mm (0.02 in.) thick, and the thread depth of the hole shall be not less than 13 mm (0.5 in).

Location

The ground pads should be welded on or near the transformer base, one in each high-voltage compartment and one in each low-voltage compartment. If the transformer tank and compartment are separate, these pads shall be electrically connected.

Pad Mounted Transformer Components

Pad mounted transformers have several key components:

• Transformer Tank: Made of steel, it houses the core and windings.
• Transformer Core: Provides a path for magnetic flux.
• Transformer Windings: Copper or aluminum conductors wrapped around the core.
• Bushings: Insulating devices for electrical connections.
• Tap Changer: Adjusts output voltage as needed.
• Insulating Oil: Provides insulation and cooling.
• Gauges: Measures parameters like oil temperature and pressure
• Lifting Lugs: Used for transportation.
• Grounding Terminals: Ensures electrical safety.
• Nameplate: Displays essential information.
• Loadbreak Switch: Allows for the safe interruption of current flow during maintenance or repairs.
• Fuses: Protects against overcurrent conditions by melting when the current exceeds a certain threshold.

Try for free: Comprehensive Guide to Pad-Mounted Transformers

Daelim Transformer Service

Daelim has a local transformer after-sales service center in North America and South America in the United States, Canada, Mexico, Chile, Ecuador, and other North America. It can be installed, after-sales, maintenance, and other services for transformers locally, and responds 24 hours.

Daelim Transformer's site in Houston has a large number of pad mounted transformers that can be shipped without waiting. Contact us for inventory information

Daelim's pad-mounted transformer diagram:

Daelim has a professional technical team, which can draw the outline drawing of the transformer for you in a very short time according to your technical parameter requirements.

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Three phase pad mounted transformer package

Daelim transformer uses the packaging method of wooden boxes and wooden pallets.

Daelim's pad-mounted transformer quality and tech control

The DAELIM factory has strict technical and quality control to ensure each transformer's reliable, safe, and electrical performance.

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Daelim Transformer Offers Tailored Transformer Solutions

With a team of highly professional and experienced engineers and marketing service experts, Daelim Transformer can swiftly immerse itself in your project to deliver the optimal transformer solution. Whether your venture falls within industries such as Manufacturing, Utilities, Battery Energy Storage Systems (BESS), Electric Vehicle (EV) Charging, Renewable Energy, Real Estate, Crypto mining, Oil and Gas, or others, Daelim Transformer stands ready to provide you with expert Transformer Solutions.