ZHENGXI Control Transformers are designed to provide safe, stable, and reliable voltage for a wide range of control circuits and automation systems. Whether used in machine tools, CNC systems, lighting control panels, or HVAC equipment, our transformers ensure consistent performance and operator safety.
With over 20+ years of experience in transformer manufacturing, ZHENGXI delivers high-quality single-phase and three-phase control transformers that meet global electrical standards and industrial requirements.
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.
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.
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.
What Is a Control Transformer?
A control transformer is a compact dry-type transformer that steps down or isolates voltage to power control circuits, signal lamps, relays, and other low-voltage components.
It is typically used in AC 50Hz or 60Hz circuits with voltages up to 1000V, and it is capable of long-term continuous operation under rated load.
Control transformers are essential in systems where stable and safe control voltage is required — helping protect electrical equipment from voltage fluctuations, interference, and overloads.
Main Features
⚡ Stable Output Voltage: Ensures precise and steady voltage for control systems.
🔌 Excellent Isolation: Provides electrical separation for operator and equipment safety.
🔇 Low Noise & Low Loss: Built with premium-grade silicon steel and copper windings for high efficiency.
🛠️ Durable & Reliable: Designed for continuous operation with minimal maintenance.
🌍 Custom Voltage Options: Available in various input/output configurations such as 380V/220V, 380V/36V, 220V/24V, etc.
Applications
ZHENGXI control transformers are widely used in:
Machine tools and CNC equipment
Industrial control panels
Electrical cabinets and automation systems
Signal lighting and instrumentation
HVAC and refrigeration control systems
Why Choose ZHENGXI Control Transformers
✅ 20+ years of manufacturing expertise
✅ OEM & ODM customization available
✅ Certified quality (CE, ISO, RoHS)
✅ Global export experience and technical support
✅ Fast delivery and factory-direct pricing
Each transformer is tested under strict quality standards to ensure maximum performance, electrical safety, and long service life — trusted by thousands of industrial customers worldwide.
Get Your Custom Control Transformer Today
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