Industrial Control Transformer Dimensions Chart：Size vs. Power Rating Comparison
May 02,2025 | nretec
TRANSFORMERS FOR INDUSTRIAL CONTROL
BK Series Industrial Control Transformers
High-quality control transformers designed specifically for industrial automation, CNC machines, control panels, and various industrial equipment. These transformers provide reliable power conversion for control circuits with excellent voltage regulation and isolation.
| Model | Capacity | Dimensions (mm) | Primary Voltage | Secondary Voltage | ||
|---|---|---|---|---|---|---|
| Length | Width | Height | ||||
| BK-25VA | 25VA | 80 | 78 | 95 | 220V, 380V or based on customer's need |
12V, 24V, 36V, 110V, 127V, 220V, 380V or based on customer's need |
| BK-50VA | 50VA | 89 | 89 | 95 | ||
| BK-100VA | 100VA | 99 | 107 | 114 | ||
| BK-150VA | 150VA | 105 | 104 | 116 | ||
| BK-250VA | 250VA | 119 | 114 | 134 | ||
| BK-300VA | 300VA | 120 | 120 | 133 | ||
| BK-500VA | 500VA | 135 | 148 | 147 | ||
| BK-1000VA | 1000VA | 151 | 161 | 166 | ||
Technical Specifications
Capacity Range
The BK series offers a wide range of capacity options from 25VA to 1000VA, suitable for various industrial control applications from small control panels to larger industrial equipment.
Voltage Options
Primary voltage options include standard 220V and 380V inputs, while secondary voltage options include 12V, 24V, 36V, 110V, 127V, 220V, and 380V. Custom voltage configurations are available upon request to meet specific application requirements.
Construction Features
All BK series transformers feature:
- High-quality silicon steel laminations for improved efficiency
- Copper windings for better conductivity and heat dissipation
- Class B insulation system (130°C) as standard
- Vacuum impregnation with high-quality varnish for moisture resistance
- Robust mounting plates for secure installation
- Terminal blocks for easy wiring connections
Applications
BK Series industrial control transformers are ideal for:
- CNC machines and machining centers
- Programmable Logic Controllers (PLCs)
- Industrial automation systems
- Control panels and switchgear
- Motor control circuits
- Solenoid valves and relays
- Industrial sensors and instrumentation
- Factory equipment and production lines
Selection Guide
When selecting an industrial control transformer:
- Determine the VA rating needed based on the total load of all connected devices
- Select primary voltage based on your available supply voltage (typically 220V or 380V)
- Choose secondary voltage based on the requirements of your control devices (commonly 24V for modern control systems)
- Consider physical dimensions to ensure the transformer will fit in your control panel or enclosure
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