Product Features
High quality iron core
The core is made of high-quality siliconsteel sheet, rules and close, anti-oxidation.high strength.
Mode of connection
The input terminal 0 is a common terminal, and combine into different input voltages with other numbers
The output terminal 11 is a common terminal and combine into different output voltages with other numbers
Model Meaning
| Model | BK □ |
| B | transformer |
| K | control |
| □ | rated capacity |
Technical Parameters
| Model NO. | BK |
| Capacity | 100VA 150VA 200VA 250VA 300VA 400VA 500VA 700VA 800VA 1KVA 1.2KVA 1.5KVA 2KVA 2.5KVA 3KVA 4KVA 5KVA |
| Input voltage | Two phase 440V/415V/380V/360V |
| Output voltage | Customizable two-phase 440V/12V/24V/36V/48V/60V/120V/220V |
| Frequency | 50Hz/60Hz |
| Work efficiency | ≥98% |
| Insulation resistance | ≥50MΩ |
| Waveform distortion | No additional waveform distortion |
| Overload capacity | Two times the rated current for one minute |
| Electrical strength | Industrial frequency sinusoidal voltage 3000V for onr minute without breakdown phenomenon |
| Ambient temperature | -15°C~+ 40°C |
Specifications
| MODEL | Overall size(mm) | Installation size | Aperture(K*J) | |||
| B | D | E | A | C | ||
| BK-100VA | 98 | 85 | 108 | 84 | 65 | 5*8 |
| BK-150VA | 105 | 86 | 110 | 76 | 77 | 5*8 |
| BK-200VA | 105 | 105 | 115 | 85 | 87 | 8*11 |
| BK-250VA | 105 | 115 | 110 | 85 | 95 | 8*11 |
| BK-300VA | 115 | 110 | 115 | 90 | 90 | 8*11 |
| BK-400VA | 135 | 125 | 140 | 110 | 97 | 8*13 |
| BK-500VA | 135 | 130 | 140 | 110 | 103 | 8*13 |
| BK-600VA | 152 | 110 | 150 | 120 | 90 | 8*13 |
| BK-700VA | 152 | 110 | 150 | 120 | 90 | 8*13 |
| BK-800VA | 152 | 125 | 150 | 120 | 105 | 8*13 |
| BK-1KVA | 152 | 142 | 165 | 120 | 120 | 8*13 |
| BK-1.5KVA | 175 | 170 | 195 | 130 | 120 | 8.5*17 |
| BK-2KVA | 205 | 215 | 230 | 170 | 130 | 8*11 |
| BK-2.5KVA | 205 | 225 | 230 | 170 | 140 | 8*11 |
| BK-3KVA | 205 | 240 | 230 | 170 | 150 | 8*11 |
| BK-4KVA | 235 | 265 | 260 | 195 | 175 | 8*11 |
| BK-5KVA | 235 | 280 | 260 | 195 | 190 | 8*11 |
Control transformer dimensions

Working requirements:
- Ambient air temperature: -5°C to +40°C, with the highest monthly average temperature not exceeding +30°C;
- Installation altitude should not exceed 1000 meters;
- When the ambient temperature is +40°C, relative humidity should not exceed 50%, with higher humidity allowed at lower temperatures. The maximum average humidity in the dampest month can reach 90%, with the lowest average temperature of that month being +25°C. Condensation on the product surface due to temperature changes should be considered.
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