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.
- 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, NEMA, ASTM
- Application EV Charging
- Power Rating 45kVA
- Certificate UL ,CESI ,DNV or SGS
- Cooling Method ONAN,KNAN
- Oil Minerial Oil or FR3
- Opeartion Step Down & Step Up
Technical Specifications
Customization Optional
Packing and Shipping
Manufacturer Test
Routine Testing
Application
Technical Specifications
45kVA Three Phase Pad Mounted Transformer
45 kVA 11.95kV Transformer Technical Specifications
45 kVA 11.95kV Transformer Accessories
| Rated Power | 45 kVA |
| Rating Primary Voltage | 11950DELTA |
| 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 NEMA 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 |
| Insulating Oil Weight | 370 kg |
| Total Weight | 1000 kg |
| Outline Dimensions（L×W×H）in. | 50×39×68 |
| 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
45kVA Three Phase Pad Mounted Transformer
NPC ELECTRIC transformers offer a wide range of optional features to meet the diverse needs of electrical systems. Key options include high and low voltage bushings, such as 200 A (15kV) bushing well, feed-through inserts, and high-voltage deadbreak bushings. These ensure safe and efficient power distribution across various voltage levels.
For tank and cabinet features, we offer durable stainless steel constructions, including full stainless steel units and customizable service entrances. Additionally, features like copper ground bus bars, Kirk-Key provisions, and a nitrogen blanket enhance reliability and safety.
We also provide special designs for critical applications, seismic environments, and high altitude conditions, ensuring transformers are tailored for specific operational needs. NPC ELECTRIC transformers come with flexible switching options, such as loadbreak switches, visible break systems, and tap changers for efficient load management.
For tank and cabinet features, we offer durable stainless steel constructions, including full stainless steel units and customizable service entrances. Additionally, features like copper ground bus bars, Kirk-Key provisions, and a nitrogen blanket enhance reliability and safety.
We also provide special designs for critical applications, seismic environments, and high altitude conditions, ensuring transformers are tailored for specific operational needs. NPC ELECTRIC transformers come with flexible switching options, such as loadbreak switches, visible break systems, and tap changers for efficient load management.
Protection features include advanced overcurrent protection like Bay-O-Net fuses, MagneX™ interrupters, and vacuum fault interrupters. Overvoltage protection with surge arresters and elbow arresters is also available to safeguard against voltage spikes.
Other options include metering packages, fan systems, and control boxes in various configurations for enhanced monitoring and control. We also offer coatings in ANSI® standard colors and custom decals for safety compliance.
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.
Other options include metering packages, fan systems, and control boxes in various configurations for enhanced monitoring and control. We also offer coatings in ANSI® standard colors and custom decals for safety compliance.
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
45kVA 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, we offer wooden crate packaging that meets international shipping standards, protecting the transformer from potential damage during transit.
The sea freight wooden crates are made from high-quality, durable wood, treated to prevent moisture damage, corrosion, and pests. The crate is also reinforced to withstand the rigors of sea transport, offering superior protection from shocks and vibrations.
To enhance safety and security, the transformer is securely mounted inside the crate with anti-shift supports. This prevents any movement during transit, reducing the risk of mechanical damage. Additionally, the crate is equipped with strong, secure fastening systems to keep the transformer in place.
We ensure that all wooden crates are fully compliant with international shipping regulations, including ISPM 15 standards, to prevent any issues with customs and quarantine procedures. This makes our packaging solution both reliable and cost-effective for global shipments.
In addition to robust packaging, we provide comprehensive shipping insurance for every transformer. This insurance covers potential risks during transit, such as damage, theft, or natural disasters. By offering this coverage, we ensure peace of mind for our clients, knowing their valuable equipment is protected throughout its journey.
Whether shipping to overseas projects or international clients, our wooden crate packaging, coupled with shipping insurance, guarantees that your transformer arrives in perfect condition, ready for installation. With careful design and attention to detail, we prioritize the safety, security, and integrity of your equipment throughout the shipping process.
The sea freight wooden crates are made from high-quality, durable wood, treated to prevent moisture damage, corrosion, and pests. The crate is also reinforced to withstand the rigors of sea transport, offering superior protection from shocks and vibrations.
To enhance safety and security, the transformer is securely mounted inside the crate with anti-shift supports. This prevents any movement during transit, reducing the risk of mechanical damage. Additionally, the crate is equipped with strong, secure fastening systems to keep the transformer in place.
We ensure that all wooden crates are fully compliant with international shipping regulations, including ISPM 15 standards, to prevent any issues with customs and quarantine procedures. This makes our packaging solution both reliable and cost-effective for global shipments.
In addition to robust packaging, we provide comprehensive shipping insurance for every transformer. This insurance covers potential risks during transit, such as damage, theft, or natural disasters. By offering this coverage, we ensure peace of mind for our clients, knowing their valuable equipment is protected throughout its journey.
Whether shipping to overseas projects or international clients, our wooden crate packaging, coupled with shipping insurance, guarantees that your transformer arrives in perfect condition, ready for installation. With careful design and attention to detail, we prioritize the safety, security, and integrity of your equipment throughout the shipping process.
32
32 years of industry experience
Manufacturer Test
45kVA Three Phase Pad Mounted Transformer
Progress test
NPC Electric manufacture pad mounted transformer have the strict quality control from the raw material stage, Each 75 kVA transformer undergoes a series of routine tests before it leaves the factory, in strict adherence to the ANSI/IEEE C57.12.90 standard. These tests are critical to ensuring the transformer's performance and safety. The routine tests consist of the following:
Ratio tests on each connection.
(b) Polarity verification.
(c) Assessment of no-load losses at 105% rated voltage, corrected to 85°C.
(d) Evaluation of exciting current at 105% rated voltage.
(e) Measurement of load losses and impedance at rated current, conducted on the rated voltage connection, and corrected to 85°C. It's important to note that this test is performed on the high-voltage connection that exhibits the highest measured loss value.
(f) Applied voltage tests.
(g) Induced voltage assessments.
(h) Transformer tank leak-detection test, conducted on each transformer tank to validate the integrity of the welds. This test is also performed on the final assembled unit without the pressure relief device.
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 tests made for quality control by the manufacturer on every device or representative samples, or on parts or materials as required, to verify during production that the product meets the design specifications.
Routine Test - Induced Voltage
Purpose of Testing
The purpose of the Induced Voltage test is to simulate the electrical stress that the equipment may encounter under actual working conditions by applying an induced voltage, thereby evaluating the tolerance and stability of the equipment's insulation system. This test helps to detect the insulation performance of the equipment under high voltage conditions and ensure its safety and reliability in operation.
Testing Equipment
Induced Voltage Tester (e.g. OMICRON, Megger, HioKI, etc.)
AC voltage source, commonly 2 kV, 5 kV, 10 kV, or customized according to test requirements.
Environmental thermometer and hygrometer, used to record the temperature and humidity of the environment for appropriate test evaluation.
AC voltage source, commonly 2 kV, 5 kV, 10 kV, or customized according to test requirements.
Environmental thermometer and hygrometer, used to record the temperature and humidity of the environment for appropriate test evaluation.
Pre-Test Preparation
Disconnect all relevant power supplies and ensure that the equipment is properly grounded and discharged.
Check the connection wires and terminals to ensure they are secure and free of contamination.
Test under suitable environmental conditions: relative humidity below 75%, no rain (recommended temperature: 20-30°C).
Check the connection wires and terminals to ensure they are secure and free of contamination.
Test under suitable environmental conditions: relative humidity below 75%, no rain (recommended temperature: 20-30°C).
Test Progress
Connect the Test Instrument:
Connect the test equipment to the appropriate terminals or bushings of the device under test, ensuring that the connections are secure and properly grounded.
Apply Test Voltage:
Select the appropriate induction voltage according to the rated voltage and standard of the equipment.
Connect the test equipment to the appropriate terminals or bushings of the device under test, ensuring that the connections are secure and properly grounded.
Apply Test Voltage:
Select the appropriate induction voltage according to the rated voltage and standard of the equipment.
Measure and Record
Start the test and record the following parameters:
Induced Voltage
Applied Current
Voltage peak, stability and waveform (waveform analysis)
Any abnormal current or voltage changes during the measurement process.
Induced Voltage
Applied Current
Voltage peak, stability and waveform (waveform analysis)
Any abnormal current or voltage changes during the measurement process.
Temperature Correction
The measured induced voltage data is corrected to the reference temperature (usually 20°C) to ensure the accuracy of the test results.
Repeat Testing (if necessary)
If necessary, test different windings (HV, MV, LV) and bushings separately and compare the results at different test points.
Evaluation Criteria (Reference)
Inductive voltage ≤ 1% (Excellent): normally and meets safety standards.
1% < Inductive voltage ≤ 3% (Good): still within acceptable range.
Inductive voltage > 3% : faulty or not meet safety requirements and requires further analysis and repair.
1% < Inductive voltage ≤ 3% (Good): still within acceptable range.
Inductive voltage > 3% : faulty or not meet safety requirements and requires further analysis and repair.
*These comprehensive tests ensure that each transformer meets performance standards and operates
reliably under various conditions.
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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