3kVA Isolation Transformer
The 3kVA Isolation Transformer is a compact and highly efficient power isolation solution engineered to provide safe and stable electrical power for sensitive equipment and critical electrical systems. By creating complete galvanic separation between the incoming and outgoing circuits, the transformer effectively eliminates electrical interference, suppresses common-mode noise, reduces transient voltage spikes, and improves overall power quality. This protective design helps prevent equipment damage caused by grounding issues, electrical disturbances, and power fluctuations. Built with premium silicon steel cores and high-conductivity copper windings, the 3kVA Isolation Transformer offers excellent voltage regulation, low operating losses, and long-term reliability. Its compact footprint makes it suitable for installations where space is limited while maintaining superior electrical performance. The transformer is widely used in industrial control panels, laboratory instruments, medical devices, testing equipment, telecommunications systems, security systems, and commercial electrical installations requiring enhanced electrical safety and power conditioning. The transformer can be supplied with customized voltage combinations, enclosure designs, monitoring functions, and protection features to satisfy a wide range of application requirements. With its robust construction and maintenance-friendly design, the 3kVA Isolation Transformer provides dependable performance for demanding power distribution and equipment protection applications.
- Primary Voltage Ratings 110V / 220V / 240V / 380V / Customized
- Secondary Voltage Ratings 220V/220V, 230V/230V, 240V/240V, or custom
- Type Isolation Transformer
- Standards IEC 61558 / IEC 60076 / CE
- Application laboratory instruments, medical devices, industrial control panels
- Power Rating 3kVA
- Certificate UL, CESI, IEEE
- Cooling Method Natural Air (AN)
Technical Specifications
Customization Optional
Packing and Shipping
Manufacturer Test
Routine Testing
Application
Technical Specifications
3kVA Isolation Transformer
3kVA Isolation Transformer Data Sheet
| Parameter | Specification |
| Product Model | 3kVA Isolation Transformer |
| Rated Capacity | 3kVA |
| Transformer Type | Dry Type Isolation Transformer |
| Phase Configuration | Single Phase |
| Primary Voltage | 110V / 220V / 240V / 380V / Customized |
| Secondary Voltage | 110V / 220V / 240V / Customized |
| Rated Current | Customized According to Voltage |
| Rated Frequency | 50Hz / 60Hz |
| Voltage Regulation | ≤ 2.0% |
| Efficiency | ≥ 97.5% |
| Core Material | High-Permeability CRGO Silicon Steel |
| Winding Material | 100% Copper / Aluminum Optional |
| Insulation Class | Class F / Class H |
| Dielectric Strength | ≥ 3000V |
| Cooling Method | Air Natural (AN) |
| Temperature Rise | ≤ 80K |
| Noise Level | ≤ 45dB |
| Electrostatic Shield | Optional |
| Harmonic Filtering | Optional |
| Protection Degree | IP20 / IP23 / IP44 |
| Grounding Terminal | Standard |
| Thermal Protection | Optional |
| Ambient Temperature | -20°C to +45°C |
| Relative Humidity | ≤ 95% |
| Installation Altitude | ≤ 3000m |
| Enclosure Material | Powder-Coated Steel |
| Service Life | More than 20 Years |
| Standards | IEC 61558 / IEC 60076 / CE |
Customization Optional
3kVA Isolation Transformer
The 3kVA Isolation Transformer can be customized to support a variety of low-voltage power distribution and equipment protection requirements. Customers may specify input and output voltage combinations, frequency requirements, winding materials, insulation classes, grounding arrangements, and enclosure structures according to project specifications. Common voltage configurations include 220V to 220V, 220V to 110V, 380V to 220V, and other custom voltage transformation requirements. Optional electrostatic shielding can be integrated between the primary and secondary windings to significantly reduce electromagnetic interference and improve protection for precision instruments, communication devices, automation controllers, and sensitive electronic equipment.
For specialized applications, additional options include digital temperature monitoring systems, miniature circuit breaker integration, surge protection devices, thermal overload protection, and low-noise designs for office and medical environments. Customers may select wall-mounted, floor-standing, or portable enclosure designs depending on installation requirements. The transformer can also be supplied with customized cable entry positions, terminal block arrangements, anti-corrosion coatings, stainless steel enclosures, and company branding. These flexible customization options ensure seamless integration into industrial, commercial, laboratory, and infrastructure power systems while maximizing safety, efficiency, and operational reliability.
Packing and Shipping
3kVA Isolation Transformer
The 3kVA Isolation Transformer is packaged using professional export-grade procedures designed to protect the equipment from mechanical damage, moisture exposure, and environmental contamination during transportation and storage. Before packaging, each transformer undergoes comprehensive inspections covering electrical performance, structural integrity, insulation condition, terminal protection, and enclosure quality. All exposed electrical terminals and sensitive components are carefully protected using industrial-grade insulating materials and protective covers.
During the packing process, the transformer is secured within reinforced packaging structures designed to withstand transportation vibration and impact. Internal stabilization materials are used to prevent movement during handling and shipment. Moisture-resistant wrapping materials, waterproof barriers, and anti-condensation protection layers are applied to safeguard the transformer from humidity and environmental influences throughout the logistics process.
Packaging options can be selected according to transportation method and destination requirements. Standard packaging includes reinforced plywood export crates and fumigation-free wooden cases. For international projects, offshore facilities, and long-distance transportation routes, additional heavy-duty packaging solutions such as steel-frame crates and marine-grade preservation systems are available. These enhanced protection measures ensure the transformer maintains its quality and appearance during extended transportation periods.
Each shipment includes complete technical documentation such as routine test reports, inspection certificates, operation manuals, installation guides, packing lists, product drawings, warranty documents, and export compliance certificates. Additional customer-required documentation can be supplied upon request. The packaging and logistics process is carefully managed to ensure that every transformer arrives safely and is ready for immediate installation upon delivery.
During the packing process, the transformer is secured within reinforced packaging structures designed to withstand transportation vibration and impact. Internal stabilization materials are used to prevent movement during handling and shipment. Moisture-resistant wrapping materials, waterproof barriers, and anti-condensation protection layers are applied to safeguard the transformer from humidity and environmental influences throughout the logistics process.
Packaging options can be selected according to transportation method and destination requirements. Standard packaging includes reinforced plywood export crates and fumigation-free wooden cases. For international projects, offshore facilities, and long-distance transportation routes, additional heavy-duty packaging solutions such as steel-frame crates and marine-grade preservation systems are available. These enhanced protection measures ensure the transformer maintains its quality and appearance during extended transportation periods.
Each shipment includes complete technical documentation such as routine test reports, inspection certificates, operation manuals, installation guides, packing lists, product drawings, warranty documents, and export compliance certificates. Additional customer-required documentation can be supplied upon request. The packaging and logistics process is carefully managed to ensure that every transformer arrives safely and is ready for immediate installation upon delivery.
32
32 years of industry experience
Manufacturer Test
3kVA Isolation Transformer
Progress Test
Early manufacturing progress testing for the 3kVA 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. Preliminary dielectric withstand and insulation resistance tests are performed between primary, secondary, and shield windings. These foundational checks, supported by digital traceability records, ensure the transformer meets high isolation and safety standards from the initial production stages. 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.
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
Factory Acceptance Testing begins with accurate voltage ratio, polarity, and impedance measurements. No-load loss and excitation current tests confirm core efficiency. Full-load efficiency and temperature rise tests are performed to verify thermal performance. Dielectric withstand tests at elevated voltage levels and insulation resistance measurements validate galvanic isolation strength. Leakage current and shielding effectiveness tests ensure superior noise suppression. These routine electrical tests establish baseline performance and isolation integrity. 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.
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 systems, and high-tech manufacturing environments, offering reliable electrical isolation, surge protection, and enhanced power quality for critical single-phase applications.
Technical Advantages
● 30+ years of manufacturing experience
● ISO and UL certified production
● Customized cable and transformer solutions
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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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