75kVA Single Phase Pad Mounted transformer
NPC ELECTRIC 75 kVA pad mounted transformer meets/exceeds DOE 2016 efficiency ratings with UL/cUL listed. NPC ELECTRIC Transformer offers tailored services for your 75 kVA Transformer project. NPC ELECTRIC Transformer is the transformer manufacturer that gets the most UL&CUL certifications. Yearly, they supply over thousands of transformers to the North American market, catering to diverse industries like Renewables, Utilities, Oil and Gas, Data Centers, Crypto, Building, and many more.
- 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 480-240/240-120or customized
- H.V. Tap Range ± 2×2.5% HV taps or others
- Type Loop Feed or Radial Feed
- BIL 30/95kV
- Standards CSA, IEEE, DOE, NEMA
- Application Utilities, Hospitals, shopping malls, parks, single-family villas
- Power Rating 75kVA
- Certificate UL/cUL, CSA, CESI
- 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
75kVA Single Phase Pad Mounted transformer
Technical Specifications
Accessories
| Rated Power | 75 kVA |
| Rating Primary Voltage | 11950Delta or Customized |
| Secondary Voltage | 480-240V 240-120V 277V Customized |
| Frequency | 50/60Hz |
| Vector Group | Ii0,Ii6 |
| Winding Material | Aluminum/Copper |
| Efficiency | As IEEE,Doe 2016,CAS Std or Customized |
| Impedance Voltage | Nominal 2% 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 | 205 kg |
| Total Weight | 650 kg |
| Outline Dimensions（L×W×H）in. | 1100×900×710(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 | Ground Strap |
| Grounding Copper Bar | Nameplate |
| 1"'Drain Valve With 3/8" Sampler | Non-PCB decal |
| 1" Upper Fill Valve Filter Press Connection | High Voltage Warning Signs |
Customization Optional
75kVA Single Phase Pad Mounted transformer
NPC ELECTRIC’s single-phase pad-mounted transformers can be fully customized to meet your specific requirements.
The 75kVA Single Phase Pad Mounted Transformer offers a range of optional specifications to meet specific operational, safety, and environmental needs. These options include the selection of insulating oil types, such as traditional mineral oil or environmentally friendly biodegradable oil, to meet environmental regulations and enhance safety. For improved voltage regulation under varying load conditions, an on-load tap changer (OLTC) can be added. The transformer can also be equipped with temperature monitoring systems to provide real-time temperature data and ensure safe operation. Additional protection devices like surge arresters, fault indicators, and pressure relief valves can be incorporated for enhanced safety and reliability. To ensure the transformer’s durability in challenging conditions, corrosion-resistant coatings or weatherproof enclosures are available. These customizable options allow the 75kVA Single Phase Pad Mounted Transformer to be tailored to specific site conditions and operational requirements, ensuring optimal performance and longevity.
Packing and Shipping
75kVA Single Phase Pad Mounted transformer
NPC ELECTRIC Single-phase Pad Mounted transformers are designed to be securely packaged for sea freight transport, ensuring safe delivery across long distances.
For this purpose, The packing and shipping process for a 75kVA Single Phase Pad Mounted Transformer follows strict standards to ensure its safe transportation to the customer.
The transformer is securely packed in a durable, weather-resistant wooden crate or metal container that protects it from physical damage, moisture, and environmental factors during transit. Inside the crate, shock-absorbing materials such as foam, bubble wrap, and wooden supports are used to prevent movement and safeguard the transformer from potential impacts or vibrations.
For transportation, the transformer is securely fastened to a shipping pallet or platform with heavy-duty straps or tie-downs, ensuring it remains stable during transit. Depending on the destination, the transformer is shipped via road, rail, or sea. All packaging is clearly labeled with handling instructions and safety warnings to ensure proper care throughout the shipping process.
The shipping package includes all necessary documentation, such as customs clearance forms, certificates of origin, and any required regulatory documents to comply with international shipping standards. Upon arrival at the destination, the transformer is thoroughly inspected for any signs of damage during transit before installation.
This careful packing and shipping procedure ensures that the 75kVA Single Phase Pad Mounted Transformer arrives in optimal condition and is ready for reliable operation.
32
32 years of industry experience
Manufacturer Test
75kVA Single Phase Pad Mounted transformer
Progress Test
NPC Electirc manufacture pad mounted transformer have the strict quality control. The Progress Test for a 75kVA Single Phase Pad Mounted Transformer is conducted throughout the manufacturing process to ensure that the transformer meets all design, quality, and performance standards. This includes verifying the integrity of the core insulation and winding resistance, as well as checking the dielectric strength to ensure the transformer can safely handle electrical stress. Electrical tests, such as insulation resistance and turns ratio tests, are performed to confirm proper functionality. Additionally, the transformer’s protection devices, including bushings, surge arresters, and tap changers, are tested to ensure they operate correctly. The progress test also includes simulated load conditions to assess the transformer’s performance and efficiency. Any issues identified during the progress test are addressed before the transformer moves on to the final Factory Acceptance Test (FAT), ensuring that the 75kVA Single Phase Pad Mounted Transformer meets high-quality standards and is ready for reliable operation.
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.
The Transformer Factory Acceptance Test (FAT) for a 75kVA Single Phase Pad Mounted Transformer is a comprehensive series of checks conducted to ensure the transformer meets all technical, safety, and performance specifications before delivery. The FAT includes several key components:
Visual Inspection: A thorough inspection to ensure proper assembly and to check for any physical defects or damage.
Electrical Testing: This involves measuring the winding resistance, insulation resistance, and performing a turns ratio test to ensure correct electrical configuration.
Dielectric Strength Test: A high-voltage test is conducted to verify the transformer’s insulation integrity and its ability to withstand electrical stress.
Load Testing: The transformer is subjected to simulated load conditions to evaluate voltage regulation, efficiency, and performance under operational conditions.
Protection Device Testing: The functionality of all protection devices, such as surge arresters, tap changers, and pressure relief valves, is verified to ensure safety during operation.
The FAT ensures that the 75kVA Single Phase Pad Mounted Transformer meets all performance standards, is safe for operation, and is ready for reliable, long-term use once installed.
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
Utilities, Hospitals, shopping malls, parks, single-family villas
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
5kVA Single Phase Pad Mounted Transformer
The 5kVA Single Phase Pad Mounted Transformer is designed for reliable and efficient power distribution in residential, commercial, and light industrial applications. Ideal for medium-density areas, this transformer steps down high-voltage electricity to a usable lower voltage for safe distribution to homes and businesses.
10kVA Single Phase Pad Mounted Transformer
The 10 kVA pad-mounted transformer meets ANSI, CSA, NEMA, IEEE, and DOE standards. NPC Electric's 10 kVA pad-mounted transformers comply with DOE efficiency values and are UL listed. Based on specific technical requirements, the incoming line can be designed as either a loop feed or radial feed, and it also supports customized dual voltage.
15kVA Single Phase Pad Mounted transformer
The 15 kVA single phase pad mounted transformer operates safely, reliably, and efficiently and can be installed indoors and outdoors. This type of transformer has a low operating cost, is environmentally friendly, easy to install, and has a low purchase cost, so it is widely used in residential, commercial, and other public.
25kVA Single Phase Pad Mounted transformer
The 25kVA Single Phase Pad Mounted transformer with a power rating of 25 kVA, the high voltage of the transformer is 24940GRDY/14400×12470GRDY/7200V, which is a dual high voltage design. Customers can switch between 14.4kV and 7.2kV through a dual voltage switch according to the distribution line. There is a five-position voltage regulating switch on the high-voltage side, which can allow small changes in voltage within ±2 * 2 ½%. The 25 kVA transformer has bay o net fuse and ELSP fuse to form a double fuse system to protect the transformer from damage in circuit faults. The transformer comes complete with an oil level indicator and a 4-position load break switch, adding to its versatility and ease of maintenance.
37.5kVA Single Phase Pad Mounted transformer
The 37.5kVA Single Phase Pad Mounted transformer with high voltage (HV) specifications of 24.94GRDY/14.4 kV and low voltage (LV) of 240/120V. At its core lies a robust tank, constructed from resilient alloy 304 stainless steel, guaranteeing longevity even in the harshest conditions. The HV and LV windings, equally critical components, are meticulously crafted from high-quality aluminum to ensure unwavering performance.
50kVA Single Phase Pad Mounted transformer
NPC ELECTRIC 50 kVA pad mounted transformer meets/exceeds DOE 2016 efficiency ratings with UL/cUL listed. Design and production with ANSI/IEEE, CSA standards.NPC ELECTRIC Transformer's 50 kVA single-phase pad-mounted transformer is extensively employed in the North American market. With their wealth of project experience,NPC ELECTRIC Transformer caters to a diverse clientele, including builders, public utility departments, and transformer distributors and retailers.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