The BK Series Open Type Dry Type Control Transformer is designed to provide reliable control power for industrial machinery, CNC equipment, electrical control cabinets and automation systems. Its open-frame construction offers a compact and practical solution for installation inside electrical enclosures, machine control panels and OEM equipment.
Unlike enclosed transformers, the open type BK Series is designed for applications where the transformer is installed within a protected electrical cabinet or equipment housing. The compact structure allows efficient use of internal panel space while providing stable isolated control power for control circuits and auxiliary electrical loads.
Voltnex Power manufactures BK Series open type control transformers with customized capacity, input and output voltage, winding configuration, insulation class and mounting dimensions. Copper or aluminum winding options are available according to application requirements.
Key Features
- Open-frame dry type construction
- Compact structure for control cabinets and OEM equipment
- Single-phase and customized configurations available
- 50Hz / 60Hz operation
- Copper or aluminum winding options
- Class F / H insulation options
- Natural air cooling
- Multiple primary and secondary voltage configurations
- Panel and base mounting options
- Custom terminal and mounting arrangements
- OEM and ODM manufacturing
- Suitable for industrial control and auxiliary power applications
Technical Specifications
Specifications can be customized according to the electrical and mechanical requirements of the application.
Compact Control Power for Electrical Cabinets
The BK Series Open Type Dry Type Control Transformer is particularly suitable for electrical cabinets where the transformer is installed inside a protected enclosure. It provides isolated control power for PLCs, relays, contactors, solenoid valves, switches, indicator lamps and other control components.
Common voltage configurations include:
380V / 400V / 415V → 110V / 120V / 24V
and
440V / 480V → 120V / 24V
Custom primary and secondary voltages can be supplied for machinery and OEM equipment.
The transformer capacity should be selected according to the continuous control load and the inrush requirements of connected inductive components such as contactors and solenoid devices.
Open Frame Construction for OEM Equipment
The open type structure allows the transformer to be integrated directly into electrical control cabinets, machine panels and industrial equipment. This configuration can help reduce installation space and provides flexibility for OEM equipment design.
Mounting dimensions, terminal positions and transformer configuration can be customized according to the customer’s equipment layout.
The open-frame design is intended for installation within a suitable protective enclosure or electrical cabinet rather than direct exposure to the surrounding environment.
Read More：BK Series Enclosed Dry Type Control Transformer
Industrial Applications
BK Series Open Type Dry Type Control Transformers can be used for:
- CNC machine control systems
- Machine tools
- Industrial automation equipment
- Electrical control cabinets
- PLC control systems
- Relay and contactor circuits
- Motor control panels
- Conveyor systems
- Robotic equipment
- Production machinery
- OEM electrical equipment
- Auxiliary control power systems
The transformer provides a practical control power solution for equipment manufacturers and electrical system integrators.
Flexible Electrical Configuration
Voltnex Power can manufacture BK Series open type control transformers according to different input power supplies and control voltage requirements.
Common input voltages include 208V, 220V, 240V, 380V, 400V, 415V, 440V, 480V, 575V and 600V, while secondary voltages can be configured for 12V, 24V, 36V, 48V, 110V, 120V, 220V and other customer requirements.
Multi-tap and multi-winding configurations are also available for control systems requiring more than one secondary voltage.
Copper or aluminum winding construction can be selected according to electrical performance, equipment design and project requirements.
OEM & ODM Manufacturing
Voltnex Power provides custom open type control transformer manufacturing for machinery manufacturers, automation companies, control panel builders, distributors and industrial electrical projects.
Customization can include:
- Rated capacity
- Primary voltage
- Secondary voltage
- Frequency
- Copper or aluminum winding
- Insulation class
- Multi-tap configuration
- Multi-winding configuration
- Terminal arrangement
- Mounting dimensions
- Transformer height and width
- Nameplate and labeling
Customers can provide drawings, electrical specifications or existing transformer samples for engineering evaluation and customized production.
Why Choose Voltnex Power?
Voltnex Power is a China manufacturer and supplier of industrial transformers and power equipment, providing customized control transformers for machinery, automation and electrical control applications.
The BK Series Open Type Dry Type Control Transformer is suitable for OEM, ODM, wholesale and industrial project supply, with flexible electrical and mechanical configurations for different equipment requirements.
From transformer design and specification confirmation to manufacturing, testing and delivery, Voltnex Power supports customers with customized industrial control power solutions.
For electrical cabinets, CNC machines and OEM machinery requiring compact and reliable isolated control power, the BK Series Open Type Dry Type Control Transformer provides a flexible solution for industrial control and auxiliary power applications.
Contact Voltnex Power for custom BK Series specifications, OEM/ODM production and wholesale quotations.
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