ZHENGXI is a professional transformer manufacturer specializing in high-quality low-voltage transformers for industrial, commercial, and residential applications. Leveraging decades of engineering experience and rigorous ISO-certified production standards, we deliver transformers that combine safety, efficiency, and long life. Our international customers trust Zhengxi for OEM and ODM projects, fast delivery times, and responsive technical support.
QSG Chinese 3 phase Dry Type Auto transformer 440v to 220v
If your facility requires stable and efficient voltage conversion—from 440V to 220V, 380V to 220V, or other customized three-phase voltages—the ZHENGXI QSG Series Three-Phase Dry Type Autotransformer is designed to deliver reliable performance, high efficiency, and long service life. As a trusted Chinese transformer manufacturer, ZHENGXI provides advanced engineering, strict quality control, and competitive 3 phase transformer price options to support global industrial applications.
Customized Quality Variable Audio Amplifier Power Toroidal Transformer
The Customized Quality Variable Audio Amplifier Power Toroidal Transformer from ZHENGXI is designed to deliver exceptional audio fidelity and electrical isolation for professional audio systems. As a trusted toroidal transformer supplier, ZHENGXI specializes in manufacturing custom audio transformers that ensure minimal distortion, ultra-low noise, and perfect impedance matching — ideal for high-end amplifiers, recording equipment, broadcasting systems, and studio-grade sound engineering.
Unlike conventional EI-core transformers, toroidal transformers feature a circular core design that provides superior efficiency, low electromagnetic interference (EMI), and excellent frequency response across the 20Hz to 20kHz audio spectrum.
500VA–5000VA Single Phase Step Up and Down Voltage Converter 110v to 220v
The ZHENGXI 500VA–5000VA Single Phase Step Up and Down Voltage Converter is perfect for small industrial devices, office electronics, and home appliances used in various locations since it can securely and effectively convert voltages between 110V–120V and 220V–240V.
High efficiency, low heat generation, and low noise are features of the SDT series, which is constructed with a toroidal copper-core transformer. This device provides steady, clean power to safeguard your priceless equipment, whether you're stepping down from 220V to 110V or up from 110V to 220V.
Single Phase Toroidal Isolation Transformer 220v To 220v With 2 Output Sockets
This 220V to 220V single-phase toroidal isolation transformer is made to supply delicate electronic and audio devices with clean, steady, and noiseless power. It efficiently isolates electrical noise and interference using high-efficiency toroidal core technology, guaranteeing connected devices operate at their best and are safe.
With two outputs and a smart HD LCD display, users can effortlessly keep an eye on operating condition, load, and voltage in real time. This isolation transformer provides clean power, low electromagnetic interference, and long-term reliability whether it is utilized in industrial control systems, medical equipment, audio systems, or labs.
TC 100va-5Kva Portable Small Step Up And Down Voltage Converter 110v To 220v Transformer
The TC Series Portable Step Up and Down Voltage Converter is designed for users who need to operate electrical appliances with different voltage standards. This reliable 110V to 220V transformer efficiently converts power between 110V–120V and 220V–240V, ensuring safe and stable performance for your devices anywhere in the world.
With its dual-core design, the 110 To 220 Transformer works both ways:
- Converts 110V to 220V (step-up)
- Converts 220V to 110V (step-down)
Simply select the correct input voltage for your region using the built-in voltage selector switch — available options: 110V / 220V / 230V / 240V. The corresponding output provides clean and stable AC power for your equipment.
Single-Phase 220V To Three-Phase 380V Phase Converter
The DZW series is a compact, high-performance Single-Phase To Three-Phase transformer alternative — a smart Phase Converter that turns ordinary 220V single-phase mains into reliable three-phase 380V power. Using advanced SVPWM (space-vector PWM) modulation together with rectification, frequency conversion, inversion and voltage boosting, the unit delivers a true three-phase sine wave with harmonic distortion below 2% and excellent transient response.
JMB Single-Phase Portable Lighting Step Down Control Transformer 25Va~50Kva
The JMB series is our rugged, portable single-phase control transformer built for lighting and small industrial equipment. It steps down common mains voltages to isolated, Safety Extra-Low Voltage (SELV) outputs — ideal for damp job sites, confined spaces and metal enclosures where safety matters. Available from 25 VA up to 50 kVA, with multiple taps and optional protective features.
High-Efficiency 500va-1000Kva Three Phase Dry Type Control Transformer 415V 400V 380V
The SBK Series three-phase dry-type control transformer (500VA–1kVA) delivers compact, reliable voltage conversion for industrial control, automation and machinery applications. Available with configurable primary and secondary voltages (standard: 380V / 400V / 415V) and rated for 50Hz or 60Hz systems, this transformer is designed for low-voltage networks (<1kV). Its dry, air-cooled construction eliminates oil, reduces fire risk and lowers routine maintenance — making it a safe, cost-effective choice for motor control centers, CNC systems, PLC cabinets and distribution panels.
GBK2 Single Phase 220v To 220v Toroidal Balanced Isolation Transformer 300va-2Kva
Ensure pristine power quality and maximum safety for sensitive loads with the GBK2 toroidal isolation transformer. Designed for applications that demand low noise, low leakage and stable output (220V → 220V), the GBK2 series isolates your equipment from mains disturbances, suppresses transients and reduces common-mode interference. Its compact toroidal core delivers higher efficiency and lower audible hum than conventional laminated transformers—ideal for medical devices, pro audio, laboratory instruments and industrial controls.
JBK 25va-5000va Single Phase Dry Type Machine Control Isolation Transformer 220v to 110v
The JBK series is a compact dry-type control transformer designed for machine control and isolation in industrial panels. Typical use is 220 V → 110 V control circuits for contactors, relays, PLCs and sensors. Built for low noise, high reliability and easy cabinet mounting, JBK protects control circuits from mains disturbances while simplifying wiring and maintenance.
SG 10kva-1000kva Three Phase Dry Type Isolation Step Down Transformer
The SG series three-phase dry type isolation transformer is a high-performance power solution engineered for AC 50 Hz–60 Hz circuits up to 660 V. Designed for industrial production lines, data centers, precision machine tools, medical equipment, and imported critical devices, it provides electrical isolation, stable voltage conversion, and superior noise suppression.
With a capacity range of 10 kVA to 1000 kVA, this transformer meets and exceeds international standards including IEC 439 and GB 5226, delivering dependable power where safety and efficiency are paramount.
Bk 100va-5kva Single Phase Isolation Control Power Transformer
The BK series single-phase isolation control power transformer (commonly called a BK transformer) delivers stable, isolated control voltages for industrial and commercial equipment. Available from 100 VA to 5 kVA, the unit uses a thyristor (SCR) control module with feedback to provide precise closed-loop voltage regulation even when the input supply fluctuates.
This control transformer is built to international safety and efficiency standards and is perfect for CNC machines, PLCs, automation panels, lighting circuits, and other precision systems that need a stable control supply.
Comprehensive Low Voltage Transformer Line
Our low-voltage transformers are designed for loads up to 600 V and are ideal for systems with single-phase 220 V or three-phase 380 V inputs. They offer an output range of 24 V to 660 V. We offer:
Isolation Transformers – Provide electrical isolation, protecting sensitive equipment from electrical noise and surges.
Control Transformers – Ensure stable voltage for control circuits in CNC machine tools, elevators, and automation systems.
Dry-Type Transformers – Air-cooled, flame-resistant, and minimal maintenance.
Toroidal Transformers – Compact, low-loss designs are ideal for audio equipment and precision instruments. Autotransformers – An economical voltage conversion solution when isolation is not required.
All transformers utilize high-quality copper windings and premium magnetic cores, ensuring low no-load losses and high efficiency.
Operating Principle and Key Benefits
Like all transformers, low-voltage transformers operate on the principle of electromagnetic induction. When AC current flows through the primary winding, it generates a varying magnetic field in the magnetic core, inducing a voltage in the secondary winding. By adjusting the turns ratio between the primary and secondary windings, the transformer can step up or down the voltage while maintaining the same frequency.
Why Choose Us Low-Voltage Transformers?
High Efficiency: Optimized magnetic core design reduces energy loss and heat buildup.
Custom Engineering: Flexible voltage ratings, housing types, and mounting options are available to meet your project needs.
Compliant with Global Standards: CE, RoHS, and ISO certified for international market use.
Reliable After-Sales Support: Technical consultation and rapid spare parts delivery minimize downtime.
Applications
Our low-voltage transformers are widely used in power distribution systems, industrial machinery, lighting networks, HVAC systems, renewable energy facilities, and household appliances. Their rugged design ensures stable operation even in harsh environments.
FAQ
1. What is the difference between an isolation transformer and an autotransformer?
Isolation transformers provide complete electrical isolation between input and output circuits to ensure safety and reduce noise. Autotransformers share a single winding for input and output, providing a more compact and economical solution when isolation is not required.
2. How do I select the appropriate low-voltage transformer capacity?
Determine the total load of the equipment in kilovolt-amperes (kVA), add a 30-50% safety margin, and consider factors such as inrush current, ambient temperature, and installation conditions. Our engineering team can provide custom sizing recommendations.
3. Are Zhengxi low-voltage transformers suitable for international markets?
Yes. All products comply with IEC and CE standards and can be configured for voltage and frequency (50 Hz or 60 Hz) in different regions, making them ideal for export and global projects.
Zhengxi low-voltage transformers deliver superior performance, safety certifications, and support from a team dedicated to your success, helping you improve your power system performance. Contact us today for a custom quote or technical consultation.
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