01
BK Series Control Transformers – Reliable Power Solutions
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
Type Designation

| Model | External Dimensions | Installation Dimensions | |||
| 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-100VA | 150 | 155 | 175 | 127 | 130 |
| BK-1500VA | 171 | 175 | 190 | 130 | 150 |
| BK-2000VA | 171 | 195 | 190 | 130 | 170 |







Claire
Mr.Fu

Claire











