The BK Series High Capacity Industrial Control Transformer is designed for industrial equipment and electrical systems that require higher-capacity auxiliary, control, isolation or step-down power. With capacities from 500VA to 100KVA, the BK Series provides a flexible power solution for large machine tools, CNC production lines, industrial automation systems, control cabinets, motor control equipment and electrical distribution applications.
Manufactured by Voltnex Power, these dry type control transformers can be customized according to primary voltage, secondary voltage, capacity, phase, winding configuration, insulation class and mechanical dimensions. The transformer can be supplied for OEM equipment manufacturing, industrial control projects, electrical panel integration and wholesale applications.
High Capacity Industrial Control Power
Compared with conventional small control transformers, the high-capacity BK Series is designed for applications with larger auxiliary and control power requirements. It can provide isolated or transformed power for multiple control circuits, contactors, relays, PLC systems, motors, solenoid valves, indicators and other industrial electrical loads.
The transformer can be configured as a single-phase or three-phase control transformer, with 1:1 isolation, step-up or step-down voltage ratios according to the electrical system requirements.
Key Features
- 500VA–100KVA Capacity: Suitable for higher-power industrial control and auxiliary power applications.
- Single or Three Phase: Flexible configurations for different industrial electrical systems.
- Multiple Voltage Options: Available for common industrial input and output voltages with customized configurations.
- Dry Type Construction: Air-cooled design without liquid insulation, suitable for indoor industrial installations.
- Reliable Electrical Isolation: Helps separate control circuits from the primary power supply according to the required transformer configuration.
- Custom Windings: Copper or aluminum winding options according to project requirements.
- Flexible Insulation: Class F or Class H insulation configurations available.
- OEM & ODM Manufacturing: Customized electrical and mechanical designs for industrial equipment manufacturers.
- Factory Direct Supply: Manufactured by Voltnex Power for distributors, system integrators and industrial customers worldwide.
Technical Specifications
Applications
The BK Series High Capacity Industrial Control Transformer can be integrated into a wide range of industrial electrical systems, including:
- Large CNC machines and machine tools
- Industrial automation production lines
- Electrical control cabinets
- Motor control systems
- PLC and relay control systems
- Contactors and starter circuits
- Conveyor and material handling equipment
- Robotic automation systems
- Manufacturing machinery
- Industrial auxiliary power systems
- OEM electrical equipment
- Custom industrial control panels
For systems with multiple control circuits or higher auxiliary power requirements, the transformer can be configured with suitable capacity and multiple secondary windings to meet the equipment’s electrical architecture.
Read More:BK Series Open Type Dry Type Control Transformer

Customized Industrial Transformer Solutions
Voltnex Power provides customized BK Series control transformers for equipment manufacturers and industrial electrical projects. Customization can include:
- Rated capacity
- Primary and secondary voltage
- Single-phase or three-phase configuration
- 50Hz or 60Hz frequency
- Step-up, step-down or 1:1 isolation ratio
- Copper or aluminum windings
- Class F or Class H insulation
- Multiple secondary windings
- Terminal configuration
- Mounting dimensions
- Enclosure or protective configuration
- Nameplate and electrical labeling
These options allow the BK Series to be adapted to different machine designs, control cabinets and industrial power systems.
Why Choose Voltnex BK Series?
The BK Series combines high-capacity industrial control power, dry type construction and flexible customization in one transformer platform. It is suitable for applications where reliable auxiliary and control voltage is required without using a conventional oil-filled transformer.
As a China-based transformer manufacturer, Voltnex Power supports OEM and ODM projects from electrical design and transformer manufacturing to customized mechanical configurations and bulk supply. Customers can request transformer specifications based on their equipment voltage, load capacity, control circuit and installation requirements.
Whether used for a large CNC machine, automated production line, industrial control cabinet or customized electrical system, the BK Series provides a scalable solution for industrial control and auxiliary power requirements.
Factory Direct OEM & Wholesale Supply
Voltnex Power supplies BK Series industrial control transformers directly from China for OEM manufacturers, electrical panel builders, automation integrators, distributors and industrial customers.
Custom capacity, voltage, winding, insulation and mounting configurations are available for project-specific requirements.
Contact Voltnex Power for BK Series high-capacity industrial control transformer specifications, datasheets and customized quotations.











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