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Pad Mounted Transformer

 
Product Introduction

High Efficiency and Low Loss

High-quality materials and manufacturing: Utilizes premium silicon steel sheets (such as oriented silicon steel) and advanced winding technologies (e.g., foil winding or helical winding) to reduce no-load losses (iron loss) and load losses (copper loss).

Energy-Saving Design

Designed to comply with international energy efficiency standards.

The efficiency of certain models can exceed 99%, significantly reducing long-term operating costs.

Three Phase Pad Mounted Transformers
Three Phase Pad Mounted Transformers

Adaptability to Complex Power Grids

Wide voltage regulation: Supports on-load tap changers (OLTC) or no-load voltage regulation to accommodate a broader range of voltage fluctuations.

Harmonic suppression: Special winding designs (such as the Dyn11 connection group) are used to suppress third harmonics, ensuring compatibility with renewable energy sources like photovoltaics and wind power.

Short-circuit endurance: Short-circuit testing and optimized impedance design help minimize the impact of fault currents.

Customization and Global Applicability

Flexible design options: Customizable capacities (from 10 kVA to 1000 MVA), voltage levels (up to ±1100 kV ultra-high voltage), and special features (e.g., salt spray resistance, explosion-proof protection) can be tailored to meet customer requirements.

 

Tachnical Data for Three Phase Pad Mounted Transformer

Rated Power (KVA)

Loss (W)

Dimension(mm)

  
 

No-load Loss (W)

On-load Loss (W)

W

D

H

Weight(kg)

75KVA

180

1250

1390

910

1430

645

150KVA

280

2200

1510

980

1530

989

300KVA

480

3650

1660

1080

1680

1415

500KVA

680

5100

1810

1160

1790

1905

750KVA

980

7500

2030

1300

2030

2755

1000KVA

1150

10300

1651

1549

1854

3235

1500KVA

1640

14500

2210

1470

2150

5835

2000KVA

2160

20645

2380

1600

2220

6430

2500KVA

2680

27786

3070

1650

2330

8865

3000KVA

3300

30300

3260

1850

2460

11300

3750KVA

4125

37875

4080

2060

2680

14400

 

 

Main Characteristics

1. Designed by patented technology and software with premium performance.
2. Core is made of high quality cold-rolled grain-oriented silicon steel sheet which produced in step-lap technology.
3. Winding is using high strength enameled wire or paper-insulated wire or copper belt, which offers uniform distribution of ampere-turns, reasonable insulation structure with high ability to withstand short-circuit.
4. Oil tank is corrugated type with high corrosion resistance. Tank surface pre-treatment liquid and coating powder adopts international top brands. The tank is degreasing, pickling, phosphorated, electrophoresis by automatic production lines, then power spray coating and heat-solidify.
5. The active part applies core free-hanging structure. The gasket is made of high-quality acrylate rubber which can inhibit ageing caused by sun and heat.

Single Phase Pad Mounted Transformer

 

Main Components

 

Tank

The outer shell that houses all the internal components.

Core

Typically made of laminated steel sheets.

Windings

Primary Winding and Secondary Winding.

Insulation

To prevent electrical conductivity between windings and the core, and turns of the windings.

Radiators/Heat Exchangers

To facilitate heat dissipation in oil-filled transformers.

Bushing

Maintain electrical isolation.

Tap Changer

Maintain voltage stability despite fluctuations in load or input voltage.

Breather

Regulate the intake of air when the oil level expands and contracts due to temperature changes for oil transformer.

Mounting Hardware

Bolts, brackets, and other hardware used to secure the transformer to its concrete pad.

 

Single Phase Pad Mounted Transformer

 

Service environment

1. Ambient temperature: Maximum +40ºC, Minimum -40ºC
2. Altitude: les Lehan 1000 meters.
3. Seismic level: less than 3m/s2 at horizontal direction and less than 1.5m/s2 at vertical direction.
4. Installation environment: No obvious and heavy pollution, no explosive and corrosive gas and dust, with good air ventilation and no severe vibration and shock.
(Note: If the application environment is different from the above standard conditions, please contact for customized designs.)

 

 

Routine test

-Measurement of winding resistance
-Measurement of voltage ratio and check of phase displacement
-Measurement of short-circuit impedance and loss
-Measurement of no-load loss and current
-Dielectric routine tests
-Tests on on-load tap-changers, where appropriate
-Leak testing with pressure for liquid-immersed transformers(tightness test)
-Tightness tests and pressure tests for tanks for gas-filled transformers
-Check of the ratio and polarity of built-in current transformers
-Check of core and frame insulation for liquid immersed transformers with core or frame insulation

Single Phase Pad Mounted Transformer

 

Type test

 

 

Temperature-rise type test

Dielectric type tests

Determination of sound level for each method of cooling for which a guaranteed sound level is specified

Measurement of the power taken by the fan and liquid pump motors

Measurement of no-load loss and current at 90% and 110% of rated voltage

 

2000 KVA Pad Mounted Transformer
 
 

Special test

-Dielectric special tests
-Winding hot-spot temperature-rise measurement
-Determination of capacitances windings-to-earth, and between windings
-Measurement of dissipation factor(tanδ) of the insulation system capacitances
-Determination of transient voltage transfer characteristics
-Measurement of zero-sequence impedance(s) on three-phase transformers
-Short-circuit withstand test
-Measurement of d.c. insulation resistance each winding to earth and between windings
-Vacuum deflection test on liquid immersed transformers
-Pressure deflection test on liquid immersed transformers
-Vacuum tightness test on site on liquid immersed transformers

 

Certificates

 

 

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FAQ

 

Q: Is OEM/ODM available?

A: Yes, it is! Our products can be Customized. We have design and engineer teams,we can customize products according to customers' drawing or requirements.

Q: What's your MOQ?

A: One Set.

Q: How is the delivery time?

A: It depends your order quantity and it normally takes about 15-20 days.

Q: How do you control the quality?

A: We have QC team comply with TQM to ensure the quality. Each step is in compliance to the standards. At the same time, we will take photos and shoot video for you if you need.Every product will be fully assembled and carefully tested before packing and shipping.

Q: How long is the warranty?

A: Within one year from the sale date, if there are any accessory problems, you just provide the photos of damaged accessory, then we will provide free accessory. According to the number of products, we will provide easily damaged accessories for free. We also can provide technical support if you need.

We're professional pad mounted transformer manufacturers and suppliers in China, specialized in providing high quality customized service. We warmly welcome you to buy cheap pad mounted transformer for sale here and get free sample from our factory. For price consultation, contact us.

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