10kVA Isolation Transformer - 120V to 240V
The 10kVA Isolation Transformer – 120V to 240V is specifically engineered to provide safe voltage conversion and complete electrical isolation for critical power applications. Designed to convert a 120V input supply into a stable 240V output while maintaining galvanic separation between the primary and secondary circuits, this transformer significantly improves power quality, reduces electrical noise, and protects connected equipment from voltage disturbances, ground loops, and transient surges. Featuring a high-efficiency silicon steel core and precision-engineered copper windings, the transformer delivers stable output voltage, low operating losses, and exceptional thermal performance. The isolation design effectively suppresses electromagnetic interference (EMI) and common-mode noise, making it particularly suitable for sensitive equipment such as industrial controllers, laboratory instruments, communication systems, medical equipment, and testing devices. The robust construction ensures reliable operation under continuous load conditions while minimizing maintenance requirements. The 10kVA Isolation Transformer is available in both open-frame and enclosed configurations, offering installation flexibility across industrial facilities, commercial buildings, telecom infrastructure, manufacturing plants, and specialized power distribution systems. Its durable design, high efficiency, and superior safety performance make it a dependable solution for voltage conversion and electrical isolation applications.
- Primary Voltage Ratings 120V
- Secondary Voltage Ratings 240V
- Type Isolation Transformer
- Standards IEC 61558 / CE / ISO 9001
- Application laboratory equipment, industrial control systems, medical devices
- Power Rating 10kVA
- Certificate UL, CESI, IEEE
- Cooling Method Natural Air (AN)
Technical Specifications
Customization Optional
Packing and Shipping
Manufacturer Test
Routine Testing
Application
Technical Specifications
10kVA Isolation Transformer - 120V to 240V
10kVA Isolation Transformer - 120V to 240V Data Sheet
| Parameter | Specification |
| Product Model | 10kVA Isolation Transformer |
| Rated Capacity | 10kVA |
| Transformer Function | Isolation & Step-Up Voltage Conversion |
| Phase Type | Single Phase |
| Primary Voltage | 120V |
| Secondary Voltage | 240V |
| Rated Input Current | 83.3A |
| Rated Output Current | 41.7A |
| Frequency | 50Hz / 60Hz |
| Voltage Accuracy | ±1% |
| Voltage Regulation | ≤ 2.0% |
| Efficiency | ≥ 98.2% |
| Core Material | Premium CRGO Silicon Steel |
| Winding Material | 100% Electrolytic Copper |
| Insulation Class | Class H |
| Dielectric Strength | 4kV / 1 Minute |
| Cooling Method | Natural Air Cooling |
| Temperature Rise | ≤ 75K |
| Noise Level | ≤ 48dB |
| Electrostatic Shield | Optional |
| Surge Protection | Optional |
| Enclosure Type | Open Type / IP23 / IP44 |
| Thermal Protection | Optional Thermostat |
| Grounding Terminal | Standard |
| Ambient Temperature | -20°C to +50°C |
| Humidity Resistance | ≤ 95% RH |
| Installation Altitude | ≤ 4000m |
| Service Life | 25+ Years |
| Standards | IEC 61558 / CE / ISO 9001 |
Customization Optional
10kVA Isolation Transformer - 120V to 240V
The 10kVA Isolation Transformer 120V to 240V can be extensively customized to suit specific application needs and environmental conditions. Customers can choose different voltage configurations, enhanced shielding layers (double or triple), and ultra-low leakage current designs for medical or laboratory use. Enclosure options include open-type IP20, wall-mounted, rack-mountable, or IP54 enclosed cabinets with stainless steel construction for corrosive or cleanroom environments.
We also provide specialized features such as integrated surge protection, PT100 temperature sensors with alarm relays, custom mounting brackets, and low-noise designs with advanced vibration dampers. Medical-grade models with reinforced insulation and higher creepage distances, as well as K-factor rated versions for harmonic loads, are available. These tailored solutions ensure maximum safety, optimal noise suppression, and seamless integration into any sensitive 120V to 240V power system.
Packing and Shipping
10kVA Isolation Transformer - 120V to 240V
The 10kVA Isolation Transformer 120V to 240V is packaged with professional-grade protection to ensure safe delivery. The unit is securely mounted on a reinforced wooden pallet with anti-vibration rubber pads and heavy-duty steel strapping. All terminals and enclosure parts are protected with high-density foam inserts and rigid corner guards. The transformer is wrapped in multi-layer anti-static and moisture-proof film with sufficient desiccant packets. A sturdy, ISPM 15 fumigated wooden crate provides complete enclosure with clear handling instructions and impact monitoring labels.
We offer flexible and secure shipping solutions worldwide. Sea freight in 20ft containers with professional blocking and bracing is the most economical option, typically taking 20–45 days. Air freight is available for urgent deliveries. Domestic and regional shipments use specialized vehicles with secure tie-down systems and weatherproof covering.
Full export documentation is prepared in advance, including commercial invoices, packing lists, certificates of origin, test reports, and safety compliance declarations to facilitate smooth customs clearance. Sustainable packing practices are prioritized by using recyclable materials and optimizing load configurations. Customers receive real-time GPS tracking and dedicated logistics coordinator support throughout the journey.
Upon arrival, we provide optional professional unpacking supervision, insulation resistance verification, and packaging disposal services. For multiple-unit orders, we support consolidated shipments and phased delivery scheduling to minimize logistics costs and site management complexity. This meticulous packing and shipping process ensures every 10kVA isolation transformer arrives in perfect condition, ready for immediate installation.
Each shipment is accompanied by a complete set of technical documentation, including routine test reports, factory inspection certificates, operation manuals, installation instructions, packing lists, wiring diagrams, warranty certificates, and export compliance documents. Additional customer-specific documentation can be prepared as required. The entire packaging and logistics process is designed to ensure that the transformer arrives in perfect condition and is ready for immediate commissioning upon delivery.
We offer flexible and secure shipping solutions worldwide. Sea freight in 20ft containers with professional blocking and bracing is the most economical option, typically taking 20–45 days. Air freight is available for urgent deliveries. Domestic and regional shipments use specialized vehicles with secure tie-down systems and weatherproof covering.
Full export documentation is prepared in advance, including commercial invoices, packing lists, certificates of origin, test reports, and safety compliance declarations to facilitate smooth customs clearance. Sustainable packing practices are prioritized by using recyclable materials and optimizing load configurations. Customers receive real-time GPS tracking and dedicated logistics coordinator support throughout the journey.
Upon arrival, we provide optional professional unpacking supervision, insulation resistance verification, and packaging disposal services. For multiple-unit orders, we support consolidated shipments and phased delivery scheduling to minimize logistics costs and site management complexity. This meticulous packing and shipping process ensures every 10kVA isolation transformer arrives in perfect condition, ready for immediate installation.
Each shipment is accompanied by a complete set of technical documentation, including routine test reports, factory inspection certificates, operation manuals, installation instructions, packing lists, wiring diagrams, warranty certificates, and export compliance documents. Additional customer-specific documentation can be prepared as required. The entire packaging and logistics process is designed to ensure that the transformer arrives in perfect condition and is ready for immediate commissioning upon delivery.
32
32 years of industry experience
Manufacturer Test
10kVA Isolation Transformer - 120V to 240V
Progress Test
Mid-to-late stage progress testing features partial discharge measurement and power frequency withstand testing at elevated voltage levels. Leakage current testing under rated voltage confirms compliance with strict safety limits. Thermal performance is evaluated through heat-run simulation at rated load. Final assembly vibration and noise level tests verify mechanical stability and quiet operation. Comprehensive data logging and photographic records from these stages provide complete quality assurance before final acceptance. Early manufacturing progress testing for the 10kVA Isolation Transformer includes core material validation through Epstein frame testing to confirm low-loss performance. Copper winding resistance and inter-turn insulation tests are conducted before assembly. Electrostatic shielding layers are installed and tested for continuity and grounding effectiveness.
Design Tests
All transformers will be tested after production is finished. Test items are as follows:
♦ Insulation Power Factor
♦ Ratio, Polarity, and Phase Relation
♦ Winding Resistance
♦ Impulse Tests
♦ 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)
♦ Insulation Resistance (Rated Voltage)
♦ Temperature Rise
♦ Dielectric Withstand (Hipot)
Factory Acceptance Test
Advanced FAT includes partial discharge testing under induced overvoltage to confirm low pC levels. Common-mode noise attenuation is measured across a wide frequency range. Overload and short-circuit withstand capabilities are tested. Final comprehensive inspection covers appearance, labeling, terminal accessibility, and enclosure protection. Complete test reports with calibration certificates, oscillographic records, and optional customer witness signatures are provided, fully certifying the 10kVA isolation transformer’s superior safety and performance. Factory Acceptance Testing begins with accurate voltage ratio, polarity, and impedance measurements for the 120V to 240V configuration. No-load loss and excitation current tests confirm core efficiency. Full-load efficiency and temperature rise tests are performed to verify thermal performance.
Routine Test - Impulse Tests
Purpose of Testing
The purpose of Impulse Tests is to verify the insulation strength of electrical equipment when it is subjected to lightning strikes or switching overvoltages. By applying high-energy impulse voltages, it is possible to detect potential defects in the insulation system.
Testing Equipment
Impulse voltage generator (e.g. Haefely, Hipotronics, Tettex, etc.)
Voltage divider (used to measure impulse voltage waveform, resistor divider or capacitor divider)
Oscilloscope (used to record impulse waveform, common brands such as Tektronix, Keysight)
Voltage divider (used to measure impulse voltage waveform, resistor divider or capacitor divider)
Oscilloscope (used to record impulse waveform, common brands such as Tektronix, Keysight)
Pre-Test Preparation
Please test under suitable environmental conditions: relative humidity less than 65%, no rain or condensation (recommended temperature: 15-30°C).
Calibrate and check the impulse voltage generator, measurement system, and control system to ensure that the instruments and equipment are in good condition and meet the test standards.
Calibrate and check the impulse voltage generator, measurement system, and control system to ensure that the instruments and equipment are in good condition and meet the test standards.
Test Progress
Connect the Test Instrument:
Connect the impulse voltage generator correctly to each winding terminal (high voltage terminal, ground terminal) of the device under test, and ensure that all test instruments are well grounded.
Apply Test Voltage:
Select the appropriate impulse voltage waveform and amplitude according to the rated voltage of the equipment
Connect the impulse voltage generator correctly to each winding terminal (high voltage terminal, ground terminal) of the device under test, and ensure that all test instruments are well grounded.
Apply Test Voltage:
Select the appropriate impulse voltage waveform and amplitude according to the rated voltage of the equipment
Measure and Record
Collect and record the impact waveform, including:
Front Time
Time to Half-Value
Peak Voltage
Distortion
Ambient temperature and humidity (especially when the test environment needs to be corrected)
Front Time
Time to Half-Value
Peak Voltage
Distortion
Ambient temperature and humidity (especially when the test environment needs to be corrected)
Waveform Correction
Check whether the impulse voltage waveform meets the specification requirements (wave head time 1.2μs ±30%, half-peak time 50μs ±20%).
If the waveform deviation is too large, adjust the impulse generator parameters and reapply the test.
If the waveform deviation is too large, adjust the impulse generator parameters and reapply the test.
Repeat Testing (if necessary)
Impact tests are performed for different phases and windings (HV/MV/LV).
In special cases, inter-winding impact, voltage-to-ground impact or coil corner impact are performed (according to the test plan).
In special cases, inter-winding impact, voltage-to-ground impact or coil corner impact are performed (according to the test plan).
Evaluation Criteria (Reference)
No internal insulation breakdown or flashover (detected by observing waveform continuity and audibly).
Waveforms are stable and meet standard specifications.
Waveform variations between repeated tests are minimal (usually good waveform overlap with no noticeable abnormal excursions).
Waveforms are stable and meet standard specifications.
Waveform variations between repeated tests are minimal (usually good waveform overlap with no noticeable abnormal excursions).
*These comprehensive tests ensure that each transformer meets performance standards and operates
reliably under various conditions.
Application
Widely used in commercial facilities, renewable energy setups, and high-tech manufacturing environments, delivering reliable electrical isolation, surge protection, and enhanced power quality for critical single-phase 120V to 240V applications.
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
37.5kVA Completely self-protected(CSP) Single Phase Pole Mounted Transformer
37.5kVA Completely self-protected(CSP) Single Phase pole Mounted transformer is an efficient and reliable power equipment designed to provide a stable single-phase power supply. The transformer adopts fully self-protection technology and has built-in multiple protection functions such as overload, short circuit, and overvoltage to ensure that the transformer automatically cuts off the power supply under abnormal conditions, effectively avoiding equipment damage and ensuring the safe operation of the system.
5000kVA Dry Type Transformer
The NPC ELECTRIC 5000kVA Dry Type Transformer is a high-capacity, reliable power solution designed for large-scale industrial and commercial operations. With a robust 5000kVA rating, it features advanced dry-type insulation technology for enhanced safety, low maintenance, and long-lasting performance. Engineered for demanding environments, this transformer ensures stable, efficient, and quiet operation while minimizing environmental impact. It achieves efficiencies around 99.48% at 35% load per DOE 2029 levels for three-phase low-voltage dry-type at 5000 kVA (aligned/interpolated from published tables showing progressive gains and 20% loss reduction from prior baselines), accommodates high harmonics, overloads, and ensures long-term reliability with reduced environmental footprint and operational expenses.
250kVA Three Phase Pad Mounted Transformer
The 250kVA Three Phase Pad Mounted Transformer is a compact, liquid-immersed, self-cooled (ONAN) distribution transformer optimized for efficient, underground power delivery in residential, light commercial, and small industrial applications. Fully compliant with IEEE C57.12.34, ANSI C57.12.00, DOE 2016 efficiency standards, and UL-listed, this compartmental-type unit features dead-front 200A high-voltage bushing wells (loadbreak inserts), radial or loop feed options, and a sealed tank using non-PCB mineral oil or FR3 natural ester fluid for improved fire safety and environmental performance.
High Voltage Prefabricated Transformer Substation
The High Voltage Prefabricated Transformer Substation is a fully integrated power distribution system designed for high-voltage transmission and medium-voltage distribution applications in utility networks, renewable energy facilities, industrial plants, and infrastructure projects. The system integrates high-voltage switchgear, power transformers, low-voltage distribution equipment, intelligent protection devices, and automation systems within a compact modular enclosure to provide reliable and efficient electrical power transformation. Engineered for demanding outdoor operating conditions, the substation features a reinforced corrosion-resistant enclosure, advanced insulation technology, optimized thermal management systems, and intelligent safety protection structures. The prefabricated modular design significantly reduces civil construction requirements, shortens installation time, and improves transportation efficiency while maintaining high operational reliability and electrical safety performance. The High Voltage Prefabricated Transformer Substation supports flexible voltage classes, transformer capacities, and smart-grid communication interfaces, making it suitable for modern utility distribution systems, renewable energy integration projects, mining operations, oil and gas facilities, and industrial manufacturing plants. With customizable electrical configurations and intelligent monitoring functions, the substation delivers scalable and energy-efficient power distribution performance for complex electrical infrastructure applications.
75kVA Three Phase Pad Mounted Transformer
The 75kVA pad-mounted transformer is tailored for utility customers in Canada, featuring a primary voltage of 25kV and a secondary voltage of 480/277V. It strictly adheres to local standards, including CSA C227.4 and CSA C802.1, ensuring optimal efficiency values. Notably, both the high and low-voltage windings are crafted from aluminum or copper.
30kVA Dry Type Transformer
The 30kVA Dry type transformer complies with ANSI, CSA, NEMA, IEEE, IEC, GB, and DOE standards. NPC ELECTRIC manufactures dry-type transformers in strict accordance with the highest industry and international standards. The 30kVA dry-type transformer provides dependable, oil-free power transformation for indoor environments, stepping down primary voltages such as 480V Delta, 600V, 11kV, or 10kV to secondary outputs like 208Y/120V, 480Y/277V, or 400Y/230V in three-phase configurations.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