500kVA Three Phase Pad Mounted Transformer
The 500kVA three-phase pad transformer is an efficient and sturdy power equipment designed for commercial, industrial and distribution systems. It has a compact design and a protective casing that meets NEMA 3R or higher standards. It is suitable for various outdoor environments and can effectively resist external factors such as weather, dust and moisture. It can meet the power needs of different regions and has a variety of optional functions, such as load regulation and temperature control systems, to further improve its operating efficiency and safety. The built-in protection device can effectively prevent overload, short circuit and other faults to ensure the safe and reliable operation of the power system.
- Primary Voltage Ratings 34.5-19.92/13.8-7.957/13.2-7.62/12.47-7.2, 24.94, 26.25, 33 or others
- Secondary Voltage Ratings 208GrdY/120;416GrdY/240 or Customized
- H.V. Tap Range ± 2×2.5% HV taps or others
- Type Loop Feed or Radial Feed
- BIL 30/95kV
- Standards IEEE, UL, DOE, CSA
- Application EV charging, Utility, bess, Data center, Oil & Gas, Wind & Solar energy
- Power Rating 500kVA
- Certificate UL/cUL, CSA, CESI, and other certificates.
- Cooling Method ONAN, ONAN/ONAF, KNAN, KNAN/KNAF
- Oil Minerial Oil or FR3
- Opeartion Step Down & Step Up
Technical Specifications
Customization Optional
Packing and Shipping
Manufacturer Test
Routine Testing
Application
Technical Specifications
500kVA Three Phase Pad Mounted Transformer
Technical Specifications
Accessories
| Rated Power | 500 kVA |
| Rating Primary Voltage | 4.16-34.5kV or customized |
| Secondary Voltage | 480GrdY/277 208GrdY/120 400GrdY/230 Customized（208Y/120 V to 4,160 V） |
| Frequency | 50/60Hz |
| Vector Group | Dyn1/Yyn0/Dyn11/Dyn5 |
| Winding Material | Aluminum/Copper |
| Efficiency | As IEEE,Doe 2016,CAS Std or Customized |
| Impedance Voltage | Nominal 3.5% or Customized 1.1-5.75% |
| Altitude | ≤1,000m or Customized |
| Color | ANSI 70 Light gray/Munsell 7GY3.29/1.5 or customized etc |
| Tank material | Mild Steel, 304 Stainless Steel |
| Insulating Oil Weight | 1055 L |
| Total Weight | 2700 kg |
| Outline Dimensions（L×W×H）in. | 1.4×1.3×1.75（m） |
| Lifting Lug | ELSP Fuse |
| Hinged Door | BAY-O-NET Fuse |
| Parking Bracket | Tap Changer |
| Tank Cover | Oil Level Gauge |
| L.V Bushing (4-Hole ) | Pressure Relief Valve |
| Two/Four Position Load break Switch | Vacuum Pressure Gauge |
| HV Grounding Copper Bar | Terminal Block |
| Temperature Indicator | Door Handle |
| H.V Bushing Well(15kV) | Ground Strap |
| Grounding Copper Bar | Nameplate |
| 1"'Drain Valve With 3/8" Sampler | IR Window |
| 1" Upper Fill Valve Filter Press Connection | Terminal Box |
| Non-PCB decal | High Voltage Warning Signs |
Customization Optional
500kVA Three Phase Pad Mounted Transformer
NPC ELECTRIC transformers offer pad mounted transformer a wide range of optional features to meet the diverse needs of electrical systems.
The optional specifications for the 500kVA Three-Phase Pad Mounted Transformer offer flexibility to suit various operational requirements and environmental conditions. These options include customizable voltage ratings, such as 13.8kV/480V or 12kV/415V, to match specific power distribution needs.
The transformer can also be equipped with different protection levels, including NEMA 3R, NEMA 4, or IP55 enclosures, providing enhanced weatherproofing and durability for outdoor installation.
The optional specifications for the 500kVA Three-Phase Pad Mounted Transformer offer flexibility to suit various operational requirements and environmental conditions. These options include customizable voltage ratings, such as 13.8kV/480V or 12kV/415V, to match specific power distribution needs.
The transformer can also be equipped with different protection levels, including NEMA 3R, NEMA 4, or IP55 enclosures, providing enhanced weatherproofing and durability for outdoor installation.
Additional options include multiple tap configurations for voltage regulation, forced air or oil cooling systems for better thermal management, and advanced monitoring systems for real-time performance tracking.
Furthermore, the transformer can feature upgraded protection devices, such as overcurrent, surge protection, and temperature monitoring, to ensure safe and reliable operation. These optional specifications allow for tailored solutions, ensuring the transformer meets the specific needs of the customer’s application and operational environment.
With these flexible options, we ensure that our transformers can be customized for specific applications, environments, and safety standards, offering long-term reliability and performance.
Furthermore, the transformer can feature upgraded protection devices, such as overcurrent, surge protection, and temperature monitoring, to ensure safe and reliable operation. These optional specifications allow for tailored solutions, ensuring the transformer meets the specific needs of the customer’s application and operational environment.
With these flexible options, we ensure that our transformers can be customized for specific applications, environments, and safety standards, offering long-term reliability and performance.
Packing and Shipping
500kVA Three Phase Pad Mounted Transformer
NPC ELECTRIC three-phase transformers are designed to be securely packaged for sea freight transport, ensuring safe delivery across long distances. For this purpose.
The 500kVA Three-Phase Pad Mounted Transformer is packaged and shipped according to strict industry standards to ensure it reaches its destination in optimal condition. The basic packing and shipping standards typically include:
Packaging:
1.The transformer is securely mounted on a sturdy wooden pallet or skid to prevent any movement during transit.
2.It is wrapped in moisture-resistant plastic or shrink-wrap to protect it from environmental factors such as dust, dirt, and humidity.
3.For additional protection, the transformer may be placed in a custom-built wooden crate or metal enclosure, ensuring it is shielded from external shocks, impacts, and rough handling during transportation.
4.Clear labeling with weight, dimensions, and handling instructions is applied to facilitate proper handling.
Shipping:
1.The transformer is shipped using appropriate modes of transportation, such as flatbed trucks, containers for ocean freight, or air cargo, depending on the destination.
2.It must comply with international shipping standards, ensuring that the transformer is properly secured to prevent shifting and damage during transit.
3.If shipping internationally, the transformer may be packed with export crating to meet the destination country’s import regulations and withstand the conditions of long-distance shipping.
These standards help ensure the transformer’s safe arrival and readiness for installation, while minimizing the risk of damage during transport.
The 500kVA Three-Phase Pad Mounted Transformer is packaged and shipped according to strict industry standards to ensure it reaches its destination in optimal condition. The basic packing and shipping standards typically include:
Packaging:
1.The transformer is securely mounted on a sturdy wooden pallet or skid to prevent any movement during transit.
2.It is wrapped in moisture-resistant plastic or shrink-wrap to protect it from environmental factors such as dust, dirt, and humidity.
3.For additional protection, the transformer may be placed in a custom-built wooden crate or metal enclosure, ensuring it is shielded from external shocks, impacts, and rough handling during transportation.
4.Clear labeling with weight, dimensions, and handling instructions is applied to facilitate proper handling.
Shipping:
1.The transformer is shipped using appropriate modes of transportation, such as flatbed trucks, containers for ocean freight, or air cargo, depending on the destination.
2.It must comply with international shipping standards, ensuring that the transformer is properly secured to prevent shifting and damage during transit.
3.If shipping internationally, the transformer may be packed with export crating to meet the destination country’s import regulations and withstand the conditions of long-distance shipping.
These standards help ensure the transformer’s safe arrival and readiness for installation, while minimizing the risk of damage during transport.
32
32 years of industry experience
Manufacturer Test
500kVA Three Phase Pad Mounted Transformer
Progress test
NPC Electric manufacture pad mounted transformer have the strict quality control .
The progress test for the 500kVA Three-Phase Pad Mounted Transformer is conducted at various stages of the manufacturing process to ensure that the transformer meets all required specifications and quality standards. These tests are performed during the production phase to monitor the performance and functionality of key components.
Design Tests
All transformer will be test after finished the production, test items as below:
♦ Insulation Power Factor
♦ Ratio, Polarity, and Phase Relation
♦ Winding Resistance
♦ Impulse Tests
♦ On load Loss Test
♦ No Load Loss Test
♦ Leak Test
♦ DC Insulation Resistance Test
♦ Transformer Turns Ratio/TTR (All Tap Voltages)
♦ Impedance Voltage & Load Loss (Rated Voltage)
♦ Polarity, 1-Ph / Phase Relation, 3-Ph (Rated Voltage)
♦ Excitation & No-Load Loss (Rated Voltage)
♦ Applied Voltage
♦ Induced Voltage
♦ Lightning Impulse
♦ Insulation Resistance (Rated Voltage)
♦ Temperature Rise
♦ Dielectric Withstand (Hipot)
Transformer Factory Acceptance Test
The Transformer Factory Acceptance Test (FAT) for the 500kVA Three-Phase Pad Mounted Transformer is a critical process conducted at the manufacturing facility to verify that the transformer meets all design specifications, safety requirements, and quality standards before shipment.
Routine Test - DC Insulation Resistance Test
Purpose of Testing
The purpose of DC insulation resistance testing is to measure the insulation resistance of a device by applying a DC voltage, thereby evaluating the health of the insulation material and the voltage withstand capability of the electrical device. This test helps detect potential insulation aging, moisture or damage, preventing electrical failures in the device.
Testing Equipment
Insulation resistance tester (e.g. Megger, Fluke, Hioki, Klein Tools, etc.)
Voltage source (usually 500V, 1000V, 2500V, or customized according to customer requirements)
Temperature and humidity meter (used to record the ambient temperature and humidity during the test to ensure that the test conditions meet the standard requirements.)
Voltage source (usually 500V, 1000V, 2500V, or customized according to customer requirements)
Temperature and humidity meter (used to record the ambient temperature and humidity during the test to ensure that the test conditions meet the standard requirements.)
Pre-Test Preparation
Make sure the device is properly grounded and fully discharged to prevent residual charge in the device from affecting the test results.
Perform the test under suitable environmental conditions. It is recommended to have a relative humidity below 75%, no rain, and a temperature range of 20-30°C to avoid moisture or temperature fluctuations affecting the test results.
Perform the test under suitable environmental conditions. It is recommended to have a relative humidity below 75%, no rain, and a temperature range of 20-30°C to avoid moisture or temperature fluctuations affecting the test results.
Test Progress
Connect the Test Instrument:
Connect an insulation resistance tester to the high voltage terminal of the device under test and to ground.
Apply Test Voltage:
Select an appropriate test voltage based on the rated voltage of the equipment .
Connect an insulation resistance tester to the high voltage terminal of the device under test and to ground.
Apply Test Voltage:
Select an appropriate test voltage based on the rated voltage of the equipment .
Measure and Record
Start the test and record the following parameters:
Insulation resistance value (MΩ)
Applied voltage
Ambient temperature and humidity during testing
Insulation resistance value (MΩ)
Applied voltage
Ambient temperature and humidity during testing
Temperature Correction
The measured insulation resistance values are corrected to a reference temperature (usually 20°C) for accurate evaluation.
Repeat Testing (if necessary)
Measure different windings (high voltage, medium voltage, low voltage) or each bushing separately, and conduct comparative analysis to ensure the insulation status of all parts.
Evaluation Criteria (Reference)
nsulation resistance ≥ 1000 MΩ (excellent)
500 MΩ ≤ Insulation resistance < 1000 MΩ (good)
100 MΩ ≤ Insulation resistance < 500 MΩ
Insulation resistance < 100 MΩ
500 MΩ ≤ Insulation resistance < 1000 MΩ (good)
100 MΩ ≤ Insulation resistance < 500 MΩ
Insulation resistance < 100 MΩ
*These comprehensive tests ensure that each transformer meets performance standards and operates
reliably under various conditions.
Application
EV charging, Utility, bess, Data center, Oil & Gas, Wind & Solar energy
Technical Advantages
● 30+ years of manufacturing experience
● ISO and UL certified production
● Customized cable and transformer solutions
Product Packaging
Transformers Packaging (1)
Transformers Packaging (2)
Transformers Packaging (3)
Transformers Packaging (4)
Transformers Packaging (5)
Transformers Packaging (6)
Transformers Packaging (7)
Transformers Packaging (8)
Related Products
45kVA Three Phase Pad Mounted Transformer
The 45 kVA pad-mounted transformer meets ANSI, CSA, NEMA, IEEE, and DOE standards. NPC Electric's 45 kVA pad-mounted transformers comply with DOE efficiency values and are UL listed. Based on specific technical requirements, the iron core can be designed as either a three-legged or five-legged assembly structure.
75kVA Three Phase Pad Mounted Transformer
The 75kVA pad-mounted transformer is tailored for utility customers in Canada, featuring a primary voltage of 25kV and a secondary voltage of 480/277V. It strictly adheres to local standards, including CSA C227.4 and CSA C802.1, ensuring optimal efficiency values. Notably, both the high and low-voltage windings are crafted from aluminum or copper.
150kVA Three Phase Pad Mounted Transformer
150kVA Three-Phase Pad Mounted Transformer is an efficient and reliable power transformer designed for applications in commercial, industrial, and residential areas. This transformer features a robust enclosure and protective design, enabling stable operation in outdoor environments and making it suitable for power systems with high load demands. With a high power capacity of 150kVA and three-phase power output, it ensures a stable voltage and smooth power supply for the equipment.
225kVA Three Phase Pad Mounted Transformer
The 225kVA three-phase pad transformer is an efficient and reliable power conversion device designed for commercial, industrial and distribution systems. With a high power capacity of 225kVA, the transformer is able to provide a stable three-phase power supply for large-scale equipment to meet high load requirements. Its rugged housing is made of weather-resistant materials and meets NEMA 3R standards, ensuring long-term stable operation in outdoor environments and preventing the influence of external factors such as water, dust and corrosion.
300kVA Three Phase Pad Mounted Transformer
The 300kVA three-phase pad transformer is an efficient and reliable power device designed for commercial, industrial and distribution systems. The transformer provides a high power capacity of 300kVA, which can provide a stable three-phase power supply for high-load equipment, ensuring efficient and smooth operation of the power system. Its sturdy housing adopts a protective design that meets the NEMA 3R standard, which can effectively resist the invasion of the external environment and is suitable for outdoor installation.
750kVA Three Phase Pad Mounted Transformer
The 750kVA three-phase pad transformer is an efficient and durable power equipment designed for commercial, industrial and distribution system applications. The transformer supports a variety of voltage configurations to meet the power needs of different regions, and is equipped with advanced protection systems such as overload protection, short-circuit protection and temperature control devices to ensure the safe operation of the equipment under high load and extreme environments.FAQ From Customers
-
What is a Transformer?A transformer is an electrical device used to change the voltage of alternating current (AC). It works on the principle of electromagnetic induction, converting high-voltage current into low-voltage current or low-voltage current into high-voltage current. Transformers are widely used in power transmission, distribution systems, and various electronic devices.
-
What are the main uses of a transformer?The main use of a transformer is voltage conversion. Transformers are used in power transmission systems to help transfer electricity from power plants to consumers. In addition, transformers are also used in electronic devices such as chargers, televisions, power adapters, etc., to adjust the voltage to meet the requirements of different devices.
-
Do you have UL listed?Yes, our transformer has UL listed. We have exported to America many pad mounted transformer,substation transformer and HV.
Welcome your inquiry
Honesty, Integrity, Frugality, Activeness and Passion