Key Features
- High Current / Low Voltage Output: Steps down mains voltage (e.g. 380V→5V) to deliver the large welding current needed for rapid, high-heat welds
- Fast Welding Cycle: Designed for quick charging/discharging of the welding circuit, enabling short weld time and high throughput.
- Water-Cooled Design: Built-in water-cooling jacket removes heat efficiently, allowing continuous heavy-duty operation and extending transformer life.
- Robust Insulation: F-class, glass-fiber-insulated windings and layers of insulation protect components from high temperatures and electrical stress, ensuring reliable performance.
- Compact E-Core Structure: Laminated E-shaped core concentrates the magnetic flux with minimal losses, maximizing efficiency and keeping size smaller for easier installation.
- Adjustable Tap Settings: Multiple secondary taps (4, 6, 8, 12 levels) allow fine voltage adjustment to match various welding materials and processes (custom voltages available).
Product parameters
| Parameter | Specification |
| Voltage Ratio | 380 V : 5 V |
| Phase | Single-Phase |
| Rated Power | 150 kW |
| Cooling Method | Water-cooled |
| Core Shape | E-type laminated steel core |
| Frequency | 50–60 Hz (low frequency) |
| Winding Type | Isolated primary and secondary windings |
| Transformer Core Type | Core form (open-frame) |
| Moisture Protection | Open type (ventilated) |
| Insulation Class | F class (155°C rated insulation) |
| Impedance | < 10⁻³ Ω |
| Tap Levels | 4, 6, 8, or 12 tap positions |
| Secondary Turns | 1–2 turns (depending on tap setting) |
| Usage Environment | ≤ 2000 m altitude; ambient ≤ 40 °C; relative humidity ≤ 90%; no corrosive gases or conductive dust; shock-free environment |
| Duty Cycle | Intermittent (30% nominal duty); no-load switching (idle) is not required |
| Certifications | CE; ISO 9001; ISO 14001; ISO 15001 |
| Model(MFBH) | BHAC-35 | BHAC-40 | BHAC-75 | BHAC-100 | BHAC-160 |
| Input power | 35kvA | 40kvA | 75kvA | 100kvA | 160kvA |
| Frequency | 380V 50Hz | 380V 50Hz | 380V 50Hz | 380V 50Hz | 380V 50Hz |
| Duty cycle | 50% | 50% | 50% | 50% | 50% |
| Rated Input Current | 92A | 105A | 197A | 263A | 429A |
| Short circuit current | 10KA | 12KA | 27KA | 30KA | 34KA |
Materials & Construction Summary
- Primary Coil: Wound with high-temperature, dual-glass-fiber insulated copper wire for excellent thermal endurance and dielectric strength.
- Magnetic Core: Precision-built from thin laminated silicon steel sheets to minimize eddy-current losses and maintain a low leakage reactance.
- Secondary (Output) Coil: Formed from heavy T2 copper bars (≈99.9% Cu) of exceptionally high electrical conductivity, ensuring efficient current transfer with minimal resistive losses
- Insulation System: Multiple insulation layers (varnish, glass fiber, barriers) isolate the windings and provide safety against short-circuits and moisture. All insulated components meet or exceed F-class thermal rating.
- Custom Design Options: Supports tailored voltage/current requirements — e.g. special high/low output voltages or tap configurations can be supplied per customer specifications, ensuring compatibility with a wide range of welding machines.
- Each element of this transformer – from the heat-sinking water jacket to the high-conductivity copper secondary – is optimized for rugged industrial welding use, making it an efficient and reliable choice for OEM and maintenance applications
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