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.
- 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, DOE, CSA
- Application BESS, Bitcoin mining, Industry, Renewable energy, EV charging, Utility
- Power Rating 150kVA
- 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
150kVA Three Phase Pad Mounted Transformer
Technical Specifications
Accessories
| Rated Power | 150 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 | 350L |
| Total Weight | 2400 kg |
| Outline Dimensions（L×W×H）in. | 1250×1480×1750 （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
150kVA Three Phase Pad Mounted Transformer
The optional specifications for the 150kVA Three-Phase Pad Mounted Transformer include a variety of customizable features to meet specific operational requirements. These options typically involve different voltage ratings (both high and low voltage), such as 12kV/480V or 13.8kV/480V, allowing flexibility based on the power distribution needs. Customers can choose from a range of enclosure protection levels, including NEMA 3R or IP55, providing enhanced weather resistance and durability for outdoor use. Additional options may include multiple cooling methods, such as ONAN or forced oil circulation for better heat dissipation, and enhanced tap configurations for voltage regulation.
The transformer can be equipped with advanced protection devices, such as overload protection, short-circuit protection, and pressure relief valves, ensuring safety in high-demand environments. Optional smart monitoring systems allow for real-time performance tracking, while corrosion-resistant coatings and noise reduction designs are available for installations in harsh or noise-sensitive locations. These customizable specifications ensure that the transformer meets the unique needs of each application, whether for industrial, commercial, or residential use.
Packing and Shipping
150kVA 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 150kVA Three-Phase Pad Mounted Transformer is carefully packed and shipped to ensure its protection during transit and to prevent any damage to the unit. The transformer is typically placed on a sturdy wooden pallet or skid, which ensures stability and prevents movement during handling. It is then wrapped in weather-resistant plastic or shrink wrap to safeguard it from moisture, dust, and environmental elements during shipping. Additionally, the transformer may be enclosed in a wooden crate or reinforced container, particularly for international or long-distance shipments, to provide extra protection.
All necessary shipping labels, including the weight, dimensions, and handling instructions, are clearly marked on the package for easy identification and smooth handling. The transformer is shipped via flatbed trucks or containerized shipping, depending on the delivery destination and logistics requirements.
Packaging is designed to meet international shipping standards, including compliance with any specific export crating requirements for air or ocean freight. If required, the shipping method and packaging will be adjusted to ensure that the transformer arrives safely and in excellent condition at the customer's location.
All necessary shipping labels, including the weight, dimensions, and handling instructions, are clearly marked on the package for easy identification and smooth handling. The transformer is shipped via flatbed trucks or containerized shipping, depending on the delivery destination and logistics requirements.
Packaging is designed to meet international shipping standards, including compliance with any specific export crating requirements for air or ocean freight. If required, the shipping method and packaging will be adjusted to ensure that the transformer arrives safely and in excellent condition at the customer's location.
32
32 years of industry experience
Manufacturer Test
150kVA Three Phase Pad Mounted Transformer
Progress test
The progress test for the 150kVA Three-Phase Pad Mounted Transformer is conducted to ensure that the transformer meets all technical and safety specifications throughout the manufacturing process. This includes testing at various stages of production, starting from the core assembly to the final testing of the complete unit. Key tests typically include:
Dielectric Strength Test: Ensuring the insulation system is capable of withstanding the required voltage levels.
Winding Resistance Test: Verifying the resistance of the windings to ensure proper conductivity and low loss.
Temperature Rise Test: Confirming that the transformer operates within the acceptable temperature limits during load conditions.
Oil Test (if applicable): Checking the oil quality for proper dielectric properties and ensuring the oil level is adequate.
Functional Tests: Ensuring that the transformer’s protective devices, such as overcurrent protection, operate correctly.
Final Inspection: A comprehensive visual and mechanical inspection to ensure that the transformer is free from any defects and meets the required standards.
These tests are performed to verify that the transformer will operate reliably and safely under normal operating conditions. Any issues identified during the progress test are addressed before the transformer is delivered to the customer.
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
NPC Electric will conducts a series of rigorous tests on transformers before they leave the factory to ensure that the transformers meet design specifications and quality standards and can operate safely and reliably in actual use.
Routine Test - Transformer Turns Ratio/TTR (All Tap Voltages)
Purpose of Testing
The purpose of the transformer turns ratio (TTR) test is to confirm whether the voltage ratio between each tap of the transformer meets the design requirements and ensure that the transformer winding is connected correctly. By measuring the voltage ratio of each tap, it is possible to detect whether there is a fault or deviation in the transformer winding.
Testing Equipment
TTR tester: such as Doble, Megger, Omicron and other brands of transformer winding ratio tester.
Voltage source: usually AC 10 V to 30 V , used to test different voltages for each tap.
Temperature and humidity meter: used to record environmental conditions during the test to ensure test accuracy.
Current probe: used to measure the load current of the winding and ensure the accuracy of the test results.
Voltage source: usually AC 10 V to 30 V , used to test different voltages for each tap.
Temperature and humidity meter: used to record environmental conditions during the test to ensure test accuracy.
Current probe: used to measure the load current of the winding and ensure the accuracy of the test results.
Pre-Test Preparation
Disconnect all transformer tap-changers from the power supply and ensure that all equipment is properly grounded and discharged.
Perform the test under suitable environmental conditions: relative humidity below 75% and no rain (recommended temperature: 20-30°C). Avoid high humidity or bad weather that may affect the test accuracy.
Perform the test under suitable environmental conditions: relative humidity below 75% and no rain (recommended temperature: 20-30°C). Avoid high humidity or bad weather that may affect the test accuracy.
Test Progress
Perform the test under suitable environmental conditions: relative humidity below 75% and no rain (recommended temperature: 20-30°C). Avoid high humidity or bad weather that may affect the test accuracy.
Measure and Record
Start the test and record the following parameters:
The voltage ratio between the windings
Deviation of the measured value from the rated ratio
The voltage ratio between the windings
Deviation of the measured value from the rated ratio
Temperature Correction
If necessary, perform temperature correction on the measured turns ratio data (especially when testing at higher or lower temperatures). Generally, the standard reference temperature for temperature correction is 20°C.
Repeat Testing (if necessary)
Test the transformer's windings of different voltage levels (high voltage, medium voltage, and low voltage) separately to ensure that the turns ratios of all windings are normal.
Evaluation Criteria (Reference)
Turns ratio error ≤ 0.5% (pass)
0.5% < Turns ratio error ≤ 1% (caution)
Turns ratio error > 1% (further inspection or corrective action required)
0.5% < Turns ratio error ≤ 1% (caution)
Turns ratio error > 1% (further inspection or corrective action required)
*These comprehensive tests ensure that each transformer meets performance standards and operates
reliably under various conditions.
Application
BESS, Bitcoin mining, Industry, Renewable energy, EV charging, Utility
Technical Advantages
● 30+ years of manufacturing experience
● ISO and UL certified production
● Customized cable and transformer solutions
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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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