Overview
The BK Series Control Transformer is a miniature dry-type transformer designed for control and lighting circuits. It is suitable for AC 50–60 Hz systems with a rated voltage of 500 V or below, and is widely used as a control power supply for electrical equipment, machine tools, and general industrial machinery. It can also be used as a power source for illumination circuits.
Featuring advanced manufacturing technology and a compact, well-designed structure, the BK series offers excellent performance, high reliability, and wide application flexibility. Designed for long-term operation under rated load conditions, it provides stable and dependable voltage transformation, making it an ideal power supply solution for control and auxiliary circuits.
Application
BK series machine tool control transformer is applicable to the circuit with voltage from 50–60 Hz to 500 V. It is usually used as the power supply for machine tool control appliances or local lamps and indicators.
Product Features
- 100% Rated Power Output
Designed to deliver full rated power continuously, ensuring stable and reliable operation under load. - High Flame Retardancy
Flame-retardant materials enhance safety performance and reduce fire risk in control circuits. - Long Service Life
High-quality insulation and robust construction support long-term, maintenance-free operation. - High Temperature Resistance (Up to 180°C)
Insulation materials withstand temperatures up to 180°C, suitable for demanding industrial environments. - Stable Quality and Energy Efficiency
Optimized design ensures stable performance with low energy loss. - Easy Installation
Compact structure and standard mounting design allow quick and convenient installation.
Model and description

Outline and mounting size




BK Series Control Transformer – Specification Table
| Rated Capacity (VA) | Primary Voltage (V) | Secondary Voltage (V) | Product Size (cm) | Mounting Size (mm) | |||
|---|---|---|---|---|---|---|---|
| B | D | H | A | C | |||
| 30 / 50 | 220, 380 or customized | 6, 12, 24, 36, 110, 127, 220, 380 or customized | 78 / 84 | 70 / 71 | 89 / 94 | 56 | 51 |
| 75 / 100 | 84 | 83 | 90 | 65 | 60 | ||
| 150 | 102 | 91 | 110 | 76 | 60 | ||
| 200 | 102 | 102 | 110 | 76 | 71 | ||
| 250 | 120 | 108 | 126 | 90 | 78 | ||
| 300 | 120 | 113 | 126 | 90 | 83 | ||
| 400 | 150 | 100 | 152 | 110 | 72 | ||
| 500 | 150 | 110 | 152 | 110 | 82 | ||
| 750 | 150 | 140 | 152 | 110 | 107 | ||
| 1000 | 150 | 165 | 152 | 110 | 132 | ||
| 1500 | 180 | 170 | 240 | 170 | 120 | ||
| 2000 | 180 | 190 | 240 | 170 | 140 | ||
| 2500 | 180 | 210 | 240 | 170 | 160 | ||
| 3000 | 180 | 220 | 240 | 170 | 175 | ||
| 4000 | 228 | 210 | 255 | 190 | 165 | ||
| 5000 | 228 | 245 | 255 | 190 | 190 | ||
| 7500 | 300 | 220 | 320 | 250 | 265 | ||
| 10000 | 300 | 260 | 320 | 250 | 300 |
