Transformers
Three Phase Pad Mounted Transformer
NPC Three-phase pad-mounted transformers, for use on underground power distribution systems, are best suited for commercial applications in public access areas and where underground service is required. These transformers meet modern design requirements for flexibility and provide a visually pleasing installation. Construction allows installation in locations accessible to the general public without the need for protective fencing or vaults. These units are ideally suited for apartment buildings, schools, hospitals, shopping centers, commercial buildings, or industrial sites. Standard, liquid-filled sizes range from 45–7500 kVA, with primary ratings from 2.4–34.5 kV.
Product View and Features
● Loop feed or radial feed
● DOE2016 or NEMA TP1 Efficiency
● Indoor or outdoor
● Wound core-coil construction
● Robust steel tank and cabinet assembly
● Dead front or live front
● 3 points door locking
● All standard tap configurations
● Dual voltage or triple voltage available
● Corrosion tank protection
● DOE2016 or NEMA TP1 Efficiency
● Indoor or outdoor
● Wound core-coil construction
● Robust steel tank and cabinet assembly
● Dead front or live front
● 3 points door locking
● All standard tap configurations
● Dual voltage or triple voltage available
● Corrosion tank protection
Applicable Standards
● IEEE C57.12.00™
● IEEE C57.12.34™
● IEEE C57.12.28™
● IEEE C57.12.70™
● IEEE C57.12.80™
● IEEE C57.12.90™
● IEEE C57.13™
● ANSI/IEEE 386
● ASTM D877
● NEMA AB1
● NEMA TR1
● IEEE C57.12.34™
● IEEE C57.12.28™
● IEEE C57.12.70™
● IEEE C57.12.80™
● IEEE C57.12.90™
● IEEE C57.13™
● ANSI/IEEE 386
● ASTM D877
● NEMA AB1
● NEMA TR1
ISO 9001 registered
UL
CSA
DOE 2016 Energy Efficient (75–2500 kVA)
Typical Product Outline
Typical Dimensions：High Voltage—15 kV Class; Low Voltage—600 V Class
Typical Performance Data: High Voltage—15 kV Class; Low Voltage—600 V Class
| 65° Rise DEAD-FRONT—LOOP OR RADIAL FEED—BAY-O-NET FUSING OIL FILLED | |||||
| Kva Rating | OUTLINE DIMENSIONS (in.) | Gallons of Fluid | Approx. Total Weight (lbs.) | ||
| A | B | C | |||
| 45 | 50 | 68 | 39 | 110 | 2100 |
| 75 | 50 | 68 | 39 | 115 | 2250 |
| 112.5 | 50 | 68 | 49 | 120 | 2350 |
| 150 | 50 | 68 | 49 | 125 | 2700 |
| 225 | 50 | 72 | 51 | 140 | 3150 |
| 300 | 50 | 72 | 51 | 160 | 3650 |
| 500 | 50 | 89 | 53 | 190 | 4650 |
| 750 | 64 | 89 | 57 | 270 | 6500 |
| 1000 | 64 | 89 | 59 | 350 | 8200 |
| 1500 | 73 | 89 | 86 | 410 | 10300 |
| 2000 | 73 | 72 | 87 | 490 | 12500 |
| 2500 | 73 | 72 | 99 | 530 | 14500 |
| 3000 | 73 | 84 | 99 | 620 | 16700 |
| 3750 | 84 | 85 | 108 | 660 | 19300 |
| 5000 | 84 | 96 | 108 | 930 | 25000 |
| 7500 | 94 | 102 | 122 | 1580 | 41900 |
| kVA | No load losses (W) | Load losses (W) | Total losses(w) | Efficiency | Standard % Impedance |
| 75 | 175 | 796 | 971 | 99.03 | 3.5 |
| 112.5 | 212 | 1213 | 1425 | 99.11 | 3.5 |
| 150 | 269 | 1547 | 1816 | 99.16 | 3.75 |
| 225 | 327 | 2315 | 2642 | 99.23 | 4 |
| 300 | 451 | 2760 | 3211 | 99.27 | 4 |
| 500 | 624 | 4271 | 4895 | 99.35 | 4.5 |
| 750 | 842 | 5854 | 6696 | 99.40 | 5.75 |
| 1000 | 996 | 7832 | 8828 | 99.43 | 5.75 |
| 1500 | 1532 | 9880 | 11412 | 99.48 | 5.75 |
| 2000 | 1782 | 12987 | 14769 | 99.51 | 5.75 |
| 2500 | 2438 | 14356 | 16794 | 99.53 | 5.75 |
| 3000 | 5385 | 28450 | 33835 | 99.17 | 5.75 |
| 3750 | 7700 | 34850 | 42550 | 99.13 | 5.75 |
| 5000 | 8240 | 33020 | 41250 | 99.34 | 6 |
Why Choose Us
As a trusted partner in energy savings and the development of green energy solutions, NPC Electric has played a pioneering role in the development of national smart grids across multiple regions.
Project Experience
With years of experience in power transmission and distribution, NPC Electric has become a trusted name in the manufacturing of cables and transformers. We’ve successfully served international EPC companies such as Elecnor, Cobra, and Equans in Latin America, Africa, and Southeast Asia.We have provided the 132kV Power Transformer,Pad Mounted Transformer and Earth Transformer.
Technical Support
NPC Electric’s skilled engineers offer full-cycle support—from design consultation and technical drawings to on-site guidance and after-sales service—ensuring peace of mind at every stage of the project.
We have a technical team of over 60 members and more than 100 after-sales engineers, ready to assist customers with installation and on-site support.
Till now, we have provided professional engineering services in countries such as Mongolia, Honduras, Peru, and Rwanda. Our services include winding resistance testing, oil testing, and installation support.
Quality Control
NPC Electric uses high-quality raw materials and advanced production processes, supported by strict quality control systems. Our products meet or exceed international standards such as IEC, UL, and ISO, ensuring safety, reliability, and long service life.
All our cables are subject to third-party laboratory testing—such as by SGS, DNV, or witnessed directly by customers—to ensure compliance and performance.
Efficient Logistics & Timely Delivery
With over 4,200 sqm of warehouse space and a strategic in China, we guarantee timely delivery and flexible logistics to meet tight project schedules globally.We have the professional team to assitance the customer to ship the production, we can do EXW,CIF,FOB,FCA,CIP or any customer request terms.
Technical Advantages
● 30+ years of manufacturing experience
● ISO and UL certified production
● Customized cable and transformer solutions
Conductor Stranded Work Shop
CCV Production Line
CCV production 01
Partical Voltage Test Labtoary
Auto-Winding Machine
Oil Chromatography Test Machine
Auto-core cutting machine
Basic Insulation Level Test Labtoary
Auto Laser Cutting Machine
Automatic Desanding Machine
Automatic Dryer Machine
FAQ From Customers
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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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