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.
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.
Bk100va-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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