1500kVA Three Phase Pad Mounted Transformer
NPC ELECTRIC's 1500kVA Three Phase Pad Mounted transformer is designed with high-quality silicon steel sheets and insulating oil, in compliance with international standards such as IEC and ANSI, ensuring efficient and stable operation. It is suitable for a variety of scenarios such as urban power distribution, residential areas, commercial parks and industrial facilities. Whether it is ring network power supply or radial power supply, it can be flexibly applied to help achieve efficient and intelligent power transmission and distribution solutions.
- 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,ANSI, CSA, DOE
- Application BESS, Data center, Oil & Gas, Wind & Solar energy, EV charging, Utility
- Power Rating 1500kVA
- Certificate UL, CUL, CSA, SGS
- 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
1500kVA Three Phase Pad Mounted Transformer
Technical Specifications
Accessories
| Rated Power | 1500 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 | 800 kg |
| Total Weight | 4400 kg |
| Outline Dimensions（L×W×H）in. | 2200×1500×2100（mm） |
| 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
1500kVA Three Phase Pad Mounted Transformer
NPC ELECTRIC’s transformers offer Three Phase Pad Mounted transformer a wide range of optional features to meet the diverse needs of electrical systems. The optional voltage range on the high-voltage side includes 12.47kV, 13.8kV, 24kV, 34.5kV, etc. The low-voltage side supports a variety of standard output voltages such as 480V, 600V, 4160V, etc. Users can also customize Delta or Wye wiring methods to match the on-site power grid system.
The transformer supports two cooling methods: ONAN (natural oil cooling) and ONAF (forced air cooling). Users can choose according to load continuity and ambient temperature requirements. For high temperature or continuous heavy load scenarios, it is recommended to select ONAF to improve cooling efficiency.
The high and low voltage sides support elbow joints (200A/600A), bolted connections and busbar interfaces. Withdrawable fuses and cable branch boxes are also available for easy installation and maintenance. All interfaces comply with ANSI/IEEE standards to ensure compatibility and reliability.
The transformer supports two cooling methods: ONAN (natural oil cooling) and ONAF (forced air cooling). Users can choose according to load continuity and ambient temperature requirements. For high temperature or continuous heavy load scenarios, it is recommended to select ONAF to improve cooling efficiency.
The high and low voltage sides support elbow joints (200A/600A), bolted connections and busbar interfaces. Withdrawable fuses and cable branch boxes are also available for easy installation and maintenance. All interfaces comply with ANSI/IEEE standards to ensure compatibility and reliability.
The transformer can be equipped with protection devices such as pressure relief valve, oil level gauge, thermostat and gas relay. The intelligent monitoring module can upload operating data such as temperature, load and voltage in real time. It can also be equipped with SCADA communication interface for remote centralized management.
The standard housing is made of hot-dip galvanized steel, and stainless steel can also be used to adapt to humid or corrosive environments. The protection level is NEMA 3R by default, and customers can upgrade to NEMA 4 or IP54 protection levels. The surface color of the housing can also be customized according to customer requirements.
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.
The standard housing is made of hot-dip galvanized steel, and stainless steel can also be used to adapt to humid or corrosive environments. The protection level is NEMA 3R by default, and customers can upgrade to NEMA 4 or IP54 protection levels. The surface color of the housing can also be customized according to customer requirements.
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
1500kVA Three Phase Pad Mounted Transformer
Packing and Shipping of 1500kVA Three Phase Pad Mounted transformer is a key link to ensure that the transformer arrives at the customer's destination safely and intact during transportation.
The transformer is packaged with a steel frame or a wooden frame. This structure can effectively protect the transformer from collision and vibration during transportation and prevent any possible damage. The packaging design meets transportation requirements and ensures the stability and safety of the transformer during transportation.
The surface of the transformer is treated with an anti-corrosion coating, which can effectively prevent the equipment from being affected by corrosive substances such as environmental moisture and salt spray during transportation. In addition, the outer layer of the packaging will be covered with a moisture-proof film to further prevent moisture intrusion, thereby ensuring the long-term stability and safety of the equipment.
Depending on the destination and transportation distance of the transformer, sea, land or rail transportation is usually used. For international transportation, sea transportation is usually the most suitable option, especially for large and heavy equipment. For domestic transportation, rail or road transportation can be selected according to the distance to ensure the safe and timely arrival of the transformer.
Through the above detailed packaging and transportation process, the 1500kVA three-phase box-type transformer can ensure that it is fully protected during transportation, reduce transportation risks, and be delivered to customers on time and safely, providing reliable guarantee for the stable operation of the power system.
The transformer is packaged with a steel frame or a wooden frame. This structure can effectively protect the transformer from collision and vibration during transportation and prevent any possible damage. The packaging design meets transportation requirements and ensures the stability and safety of the transformer during transportation.
The surface of the transformer is treated with an anti-corrosion coating, which can effectively prevent the equipment from being affected by corrosive substances such as environmental moisture and salt spray during transportation. In addition, the outer layer of the packaging will be covered with a moisture-proof film to further prevent moisture intrusion, thereby ensuring the long-term stability and safety of the equipment.
Depending on the destination and transportation distance of the transformer, sea, land or rail transportation is usually used. For international transportation, sea transportation is usually the most suitable option, especially for large and heavy equipment. For domestic transportation, rail or road transportation can be selected according to the distance to ensure the safe and timely arrival of the transformer.
Through the above detailed packaging and transportation process, the 1500kVA three-phase box-type transformer can ensure that it is fully protected during transportation, reduce transportation risks, and be delivered to customers on time and safely, providing reliable guarantee for the stable operation of the power system.
32
32 years of industry experience
Manufacturer Test
1500kVA Three Phase Pad Mounted Transformer
Progress test
NPC Electric manufacture pad mounted transformer have the strict quality control from the Raw material acceptance, including Key component inspection, Core manufacturing inspection, Winding processing and varnishing process testing, and No-load and load testing. Strict process monitoring ensures that the transformers meet high quality standards.Reduce the possibility of rework and delivery delays through early detection and adjustment.The transparent testing process allows customers to understand the production progress in real time and improve satisfaction.
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 factory acceptance test (FAT) of the 1500kVA Three Phase Pad Mounted transformer is a series of tests conducted before the transformer leaves the factory to ensure that the product meets the design and quality requirements. The main test contents include electrical performance, load and loss test, temperature rise test and protection system function test to ensure the stability, safety and efficiency of the transformer in actual operation. Through these tests, it is ensured that the equipment meets customer requirements and can be safely put into use.
Routine Test - Winding Resistance
Purpose of Testing
The purpose of winding resistance testing is to detect the continuity and connection quality of the internal conductors of the motor or transformer windings, and to promptly detect potential faults such as open circuits, poor contact or local heating.
Testing Equipment
Winding resistance tester (e.g. OMICRON, DV Power, Raytech, Megger, ISA, etc.)
Test voltage source (commonly used are 6V, 10V, 20V, 40V or 100V, depending on the equipment model or customer requirements)
Temperature and humidity meter (used to record the ambient temperature and humidity during the test)
Test voltage source (commonly used are 6V, 10V, 20V, 40V or 100V, depending on the equipment model or customer requirements)
Temperature and humidity meter (used to record the ambient temperature and humidity during the test)
Pre-Test Preparation
Check if the instrument has been calibrated to ensure the test accuracy.
Disconnect the electrical connection between the test cable and the equipment to ensure that there is no external current or voltage interference.
Select a suitable voltage range for testing and set the test voltage according to the equipment requirements.
Disconnect the electrical connection between the test cable and the equipment to ensure that there is no external current or voltage interference.
Select a suitable voltage range for testing and set the test voltage according to the equipment requirements.
Test Progress
Connect the Test Instrument:
Connect the test equipment to the winding terminals of the device under test, making sure the connections are secure and properly grounded to avoid measurement errors.
Apply Test Voltage:
Select the appropriate test current according to the equipment specifications (such as test current for low-voltage windings, single-phase or three-phase windings).
Connect the test equipment to the winding terminals of the device under test, making sure the connections are secure and properly grounded to avoid measurement errors.
Apply Test Voltage:
Select the appropriate test current according to the equipment specifications (such as test current for low-voltage windings, single-phase or three-phase windings).
Measure and Record
Start the test and record the following parameters:
Winding resistance (usually expressed in units of "Ω")
Test current (A)
Test voltage (V)
Temperature (record the winding temperature before and after the test)
Winding resistance (usually expressed in units of "Ω")
Test current (A)
Test voltage (V)
Temperature (record the winding temperature before and after the test)
Temperature Correction
The measured winding resistance values are converted to a reference temperature (usually 20°C) based on a temperature correction formula to allow accurate evaluation and comparison.
Repeat Testing (if necessary)
Test the different windings (high voltage, medium voltage, low voltage) separately and make sure to record the resistance value of each winding.
Evaluation Criteria (Reference)
Resistance deviation is less than 5% (normal)
Resistance deviation is between 5% and 10% (warning)
Resistance deviation exceeds 10% (further inspection or corrective action is required)
Resistance deviation is between 5% and 10% (warning)
Resistance deviation exceeds 10% (further inspection or corrective action is required)
*These comprehensive tests ensure that each transformer meets performance standards and operates
reliably under various conditions.
Application
BESS, Data center, Oil & Gas, Wind & Solar energy, EV charging, Utility
Technical Advantages
● 30+ years of manufacturing experience
● ISO and UL certified production
● Customized cable and transformer solutions
Product Packaging
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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.
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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.
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Do you have UL listed?Yes, our transformer has UL listed. We have exported to America many pad mounted transformer,substation transformer and HV.
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