50kVA Completely self-protected(CSP) Single Phase Pole Mounted Transformer
50kVA Completely self-protected(CSP) Single Phase pole Mounted transformer is a robust, high-efficiency solution designed for reliable single-phase power distribution in residential, commercial, and small industrial applications. This transformer features built-in protection mechanisms, including overload, short-circuit, and over-voltage safeguards, ensuring automatic disconnection during fault conditions to protect both the transformer and the electrical system. With its pole-mounted design, it is space-efficient and ideal for installations in urban, rural, and remote areas. The transformer operates with low losses, ensuring high energy efficiency and long-term performance. Built with durable materials, it offers exceptional resilience against harsh weather conditions, ensuring reliability and longevity. This transformer is an ideal choice for any application requiring consistent, stable single-phase power.
- Primary Voltage Ratings 2.4-34.5kV
- Secondary Voltage Ratings 480-240/240-120 or customized
- H.V. Tap Range ± 2×2.5% HV taps or others
- Type Completely self-protected(CSP) Type
- BIL 30-150kV
- Standards IEEE, ANSI, IEC, CSA, NEMA, UL
- Application Residential, commercial and Utility Power Distribution Networks
- Power Rating 50kVA
- Certificate CE, ISO
- Cooling Method ONAN
- Oil Minerial Oil or FR3
- Opeartion Step Down
Technical Specifications
Customization Optional
Packing and Shipping
Manufacturer Test
Routine Testing
Application
Technical Specifications
50kVA Completely self-protected(CSP) Single Phase Pole Mounted Transformer
Technical Specifications
Accessories
| Rated Power | 50 kVA |
| Rating Primary Voltage | 12.4-34.5kV |
| 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 | 62 kg |
| Total Weight | 395 kg |
| Outline Dimensions（W×D×H） | 635×675×1035 (mm) |
| Lifting Lug |
| Tap Changer |
| Pressure Relief Valve |
| Tank Cover and clamp |
| L.V Bushing |
| HV Bushing |
| Ground Strap |
| Nameplate |
| Non-PCB decal |
| High Voltage Warning Signs |
| Support lug |
| Oil fill valve |
| Surge arrester |
| Secondary breaker |
| Weak link |
Customization Optional
50kVA Completely self-protected(CSP) Single Phase Pole Mounted Transformer
NPC ELECTRIC's Completely Self-Protected (CSP) Single-Phase Pole-Mounted Transformers offer a range of customizable features to meet diverse operational needs.
The optional specifications for the 50kVA Completely Self-Protected (CSP) Single Phase Pole Mounted Transformer offer various customizations to meet specific operational and environmental requirements.
These options include different input voltage levels, such as 11kV or 13.8kV, to align with regional grid standards. Output voltage can be tailored to suit specific needs, typically offering configurations like 230V or 400V.
The optional specifications for the 50kVA Completely Self-Protected (CSP) Single Phase Pole Mounted Transformer offer various customizations to meet specific operational and environmental requirements.
These options include different input voltage levels, such as 11kV or 13.8kV, to align with regional grid standards. Output voltage can be tailored to suit specific needs, typically offering configurations like 230V or 400V.
Additional protection features such as surge protection, temperature monitoring, or remote monitoring systems can be incorporated for enhanced performance and real-time fault detection.
For installations in harsh environments, optional features like corrosion-resistant coatings, weatherproof enclosures, and advanced insulation materials can be selected to ensure durability and long-term reliability.
These customizable options allow the transformer to be adapted to diverse applications and varying operational conditions, ensuring optimal performance in different settings.
For installations in harsh environments, optional features like corrosion-resistant coatings, weatherproof enclosures, and advanced insulation materials can be selected to ensure durability and long-term reliability.
These customizable options allow the transformer to be adapted to diverse applications and varying operational conditions, ensuring optimal performance in different settings.
Packing and Shipping
50kVA Completely self-protected(CSP) Single Phase Pole Mounted Transformer
NPC ELECTRIC single-phase transformers are designed to be securely packaged for sea freight transport, ensuring safe delivery across long distances.
For this purpose, The packing process of the 50kVA CSP single - phase pole - mounted transformer is designed meticulously to safeguard the product from potential damage during transit.
First, the main body of the transformer is tightly sealed with a moisture-proof plastic film. This film acts as a barrier against moisture, preventing rust and damage to the internal electrical components. Subsequently, a layer of soft foam material is used to fully cover the transformer. Special attention is paid to the vulnerable corners and edges, where the foam is thickened to provide enhanced cushioning against impacts.
The wrapped transformer is then placed in a custom-made wooden frame. The dimensions of the frame are precisely tailored to fit the transformer. Inside the frame, there are fixing devices such as straps and slots to firmly hold the transformer in place, effectively preventing it from shifting or shaking during handling and transportation.
On the outer surface of the package, various labels are prominently affixed. Operational labels like "This Side Up", "Fragile", and "Keep Dry" are included to guide the handling personnel. Additionally, information labels indicating the product name, specification model, weight, and dimensions are also provided for easy identification.
Based on the transportation distance and road conditions, an appropriate transportation vehicle is chosen. For long-distance transportation, a professional large-scale freight truck with good shock-absorbing performance is preferred to minimize the impact of bumps during the journey.
The packed transformer is carefully placed on the transportation vehicle. Ropes, steel bands, and other fixing materials are used to securely fasten the transformer to the vehicle. This prevents the transformer from sliding or colliding due to braking, turning, or other maneuvers during driving. Moreover, additional cushioning materials are placed around the transformer to further enhance the protective effect.
During the shipping process, a GPS positioning system is employed to monitor the location and driving status of the transportation vehicle in real-time. This enables timely tracking of the transportation progress and prompt response to any emergencies. In addition, vibration sensors can be installed to monitor the vibration conditions during transportation. If the vibration exceeds the set threshold, immediate measures can be taken.
For this purpose, The packing process of the 50kVA CSP single - phase pole - mounted transformer is designed meticulously to safeguard the product from potential damage during transit.
First, the main body of the transformer is tightly sealed with a moisture-proof plastic film. This film acts as a barrier against moisture, preventing rust and damage to the internal electrical components. Subsequently, a layer of soft foam material is used to fully cover the transformer. Special attention is paid to the vulnerable corners and edges, where the foam is thickened to provide enhanced cushioning against impacts.
The wrapped transformer is then placed in a custom-made wooden frame. The dimensions of the frame are precisely tailored to fit the transformer. Inside the frame, there are fixing devices such as straps and slots to firmly hold the transformer in place, effectively preventing it from shifting or shaking during handling and transportation.
On the outer surface of the package, various labels are prominently affixed. Operational labels like "This Side Up", "Fragile", and "Keep Dry" are included to guide the handling personnel. Additionally, information labels indicating the product name, specification model, weight, and dimensions are also provided for easy identification.
Based on the transportation distance and road conditions, an appropriate transportation vehicle is chosen. For long-distance transportation, a professional large-scale freight truck with good shock-absorbing performance is preferred to minimize the impact of bumps during the journey.
The packed transformer is carefully placed on the transportation vehicle. Ropes, steel bands, and other fixing materials are used to securely fasten the transformer to the vehicle. This prevents the transformer from sliding or colliding due to braking, turning, or other maneuvers during driving. Moreover, additional cushioning materials are placed around the transformer to further enhance the protective effect.
During the shipping process, a GPS positioning system is employed to monitor the location and driving status of the transportation vehicle in real-time. This enables timely tracking of the transportation progress and prompt response to any emergencies. In addition, vibration sensors can be installed to monitor the vibration conditions during transportation. If the vibration exceeds the set threshold, immediate measures can be taken.
32
32 years of industry experience
Manufacturer Test
50kVA Completely self-protected(CSP) Single Phase Pole Mounted Transformer
Progress Test
NPC Electric manufactures pad-mounted transformers have the strict quality control. The progress test for the 50kVA Completely Self-Protected (CSP) Single Phase Pole Mounted Transformer is a series of checks conducted during the manufacturing process to ensure that the transformer meets all technical specifications and safety standards. The test verifies the proper functioning of key electrical parameters, including input and output voltage, load performance, and the effectiveness of the built-in protection mechanisms such as overload, short-circuit, and over-voltage protection. Insulation resistance and dielectric strength tests are also carried out to ensure the transformer's electrical integrity. Additionally, the self-protection system is tested to confirm its ability to automatically disconnect the transformer in case of faults. These progress tests help to identify and resolve potential issues early in the production process, ensuring the transformer meets the required standards before proceeding to the final factory acceptance test.
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
♦ 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 have 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 factory acceptance test of the 50kVA fully self-protected (CSP) single-phase pole-mounted transformer is designed to ensure that the transformer meets the relevant standards and specifications.
The test items cover electrical performance, mechanical performance, and other aspects. The electrical performance test includes a ratio test to confirm the accuracy of the voltage conversion ratio, no-load loss and load loss tests to evaluate its operating efficiency, and insulation resistance tests to detect insulation conditions to ensure safety; in terms of mechanical performance, the structural integrity of the transformer and the firmness of component connections are checked.
All tests are carried out strictly in accordance with established procedures and standards. Through detailed analysis and evaluation of the test data, it is determined whether the transformer is ready for delivery from the factory to ensure that it can operate stably and reliably in actual applications.
Routine Test - Applied Voltage
Purpose of Testing
The purpose of testing the applied voltage is to verify the insulation strength of the transformer by applying a voltage higher than its normal operating level, ensuring it can withstand potential electrical stresses. This test helps identify any weaknesses or defects in the insulation system before the transformer is put into service.
Testing Equipment
Test equipment: High voltage tester (e.g. TTR, Hipot, etc.)
Voltage source: usually 1 kV, 5 kV, 10 kV, or customized according to customer needs
Temperature and humidity meter: used to record environmental conditions
Voltage source: usually 1 kV, 5 kV, 10 kV, or customized according to customer needs
Temperature and humidity meter: used to record environmental conditions
Pre-Test Preparation
Disconnect the device from the power supply and make sure it is properly grounded and discharged.
Check the connection terminals and wiring to ensure that they are not loose or contaminated.
Test under suitable environmental conditions: relative humidity below 75% and no rain (recommended temperature: 20-30°C).
Check the connection terminals and wiring to ensure that they are not loose or contaminated.
Test under suitable environmental conditions: relative humidity below 75% and no rain (recommended temperature: 20-30°C).
Test Progress
Connect the Test Instrument:
Properly connect the test equipment to the bushings or terminals of the device under test and ensure that all connection points are properly grounded.
Selecting the test voltage:
Select the appropriate applied voltage based on the rated voltage of the equipment.
Properly connect the test equipment to the bushings or terminals of the device under test and ensure that all connection points are properly grounded.
Selecting the test voltage:
Select the appropriate applied voltage based on the rated voltage of the equipment.
Measure and Record
Start the test and record the following parameters:
Measuring leakage current
Applied voltage
Current stability
Any possible voltage fluctuations
Measuring leakage current
Applied voltage
Current stability
Any possible voltage fluctuations
Temperature Correction
If necessary, the measured data is temperature corrected to ensure that it corresponds to standard temperature conditions (usually 20°C).
Repeat Testing (if necessary)
Multiple tests were conducted on different windings (high voltage, medium voltage, low voltage) and bushings, and comparative analysis was performed.
Evaluation Criteria (Reference)
The test was normal and the equipment performed well (qualified)
The current value exceeded the allowable range and the equipment needs to be inspected or maintained (pending repair)
There was a serious fault or instability and the equipment could not continue to operate (unqualified)
The current value exceeded the allowable range and the equipment needs to be inspected or maintained (pending repair)
There was a serious fault or instability and the equipment could not continue to operate (unqualified)
Observing electrical behavior
Observe the electrical behavior of the device under test to ensure that there are no abnormal currents, arcing, noise, or electrical faults.
*These comprehensive tests ensure that each transformer meets performance standards and operates
reliably under various conditions.
Application
Residential, commercial, and Utility Power Distribution Networks
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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