Reliable BK Series Control Transformers from China Suppliers – Efficient Power Solutions for Factories
Type Designation

| 1 | Single-phase |
| 2 | Control transformer |
| 3 | Rated capacity (VA) |
Product Features
- Advanced design ensures high performance and operational reliability
- Energy-efficient construction reduces power consumption
- Compact size saves valuable installation space
- Secure terminal block connections enable safe and simple wiring
- Wide applicability across AC circuits up to 1200V, 50–60 Hz
- Suitable for machine tool control, lighting, and signal systems
- Durable build offers long service life with minimal maintenance
- Low heat generation maintains stable performance under load
- Easy to integrate into existing electrical configurations
- Manufactured with precision for consistent voltage transformation
Technical Parameters
| Parameter | Unit | Value |
|---|---|---|
| Input Voltage | V | 110 / 220 / 380 / 400 / 660 (others customizable) |
| Output Voltage | V | 6 / 12 / 24 / 36 / 48 / 110 / 127 / 220 / 380 (others customizable) |
| Voltage Accuracy | % | ±1 |
| Waveform Distortion | - | None (compared to input) |
| Voltage Regulation | % | <1.5 |
| Insulation Class | - | Class F (High Temperature Resistant) |
| Insulation Resistance | MΩ | >150 |
| Efficiency | % | Induction type 99.7%, Isolation type 95% |
| Dielectric Strength | VAC (1min) | 3000 |
| Overload Capacity | - | Up to 1.2 times rated load |
| Design Life | years | 20 |
| Noise | dB | <35 (within 1 meter) |
| Cooling Method | - | Dry-type Air Cooling |
| Temperature Rise | °C | <60 |
| Connection Method | - | Y, YynO, D, yll, D, dO |
Product Display

Dimensions

| Model | External Dimensions (mm) | Installation Dimensions (mm) | |||
|---|---|---|---|---|---|
| Bmax | Dmax | Emax | K | J | |
| BK-50VA | 85 | 80 | 92 | 65 | 60 |
| BK-100VA | 103 | 90 | 110 | 75 | 64 |
| BK-150VA | 103 | 98 | 110 | 75 | 74 |
| BK-200VA | 103 | 105 | 110 | 75 | 77 |
| BK-250VA | 114 | 122 | 125 | 90 | 90 |
| BK-300VA | 114 | 127 | 125 | 90 | 95 |
| BK-400VA | 132 | 130 | 142 | 94 | 97 |
| BK-500VA | 132 | 135 | 142 | 94 | 102 |
| BK-700VA | 150 | 140 | 175 | 127 | 115 |
| BK-1000VA | 150 | 155 | 175 | 127 | 130 |
| BK-1500VA | 171 | 175 | 190 | 130 | 150 |
| BK-2000VA | 171 | 195 | 190 | 130 | 170 |
Frequently Asked Questions
What input voltages are supported by the BK Series Control Transformer?
The BK Series Control Transformer supports input voltages of 110V, 220V, 380V, 400V, and 660V. Custom input voltages are also available upon request to meet specific application requirements.
What output voltages can the BK Series Control Transformer provide?
The standard output voltages include 6V, 12V, 24V, 36V, 48V, 110V, 127V, 220V, and 380V. Other output voltages can be customized to suit various control circuit needs.
What is the insulation class of the BK Series transformer?
The BK Series uses Class F insulation, which offers high temperature resistance, ensuring stable and safe operation even in demanding environments.
What applications is the BK Series Control Transformer suitable for?
The BK Series is ideal for machine tool control circuits, industrial lighting systems, signal circuits, and other AC control applications up to 1200V at 50–60 Hz frequencies.
How long is the design life of the BK Series Control Transformer?
The BK Series Control Transformer is engineered for a design life of 20 years, with minimal maintenance requirements, thanks to its durable construction and dry-type air cooling design.
What is the efficiency of the BK Series Control Transformer?
The BK Series achieves up to 99.7% efficiency in induction-type configurations, and 95% efficiency in isolation-type configurations, making it one of the most energy-efficient options in its class.







Claire
Mr.Fu

Claire











