Zhejiang Hongyan Electric Co., Ltd. 
ENGINEERED SOLUTION
Steel & Metallurgy
Power factor correction, harmonic mitigation and voltage support for electric arc furnaces, rolling mills, cranes and high-load metallurgical production lines.
High-Voltage Motor Soft Starter & Variable Frequency Drive System
High-voltage motor starting and variable frequency drive solutions are widely used to control the operation of large power-driven equipment, enabling soft motor startup, smooth speed regulation, and high-efficiency energy-saving operation.
High Voltage Motor Soft Starter & Variable Frequency Drive System
Medium Voltage VFD & Soft Starting Solution for Industrial Machinery
Product Overview
High-voltage motor starting and variable frequency drive solutions are widely used to control the operation of large power-driven equipment, enabling soft motor startup, smooth speed regulation, and high-efficiency energy-saving operation.
Typical driven equipment:
- Fans and blowers
- Water supply pumps
- Air compressors
- Steel rolling mills and metallurgy equipment
- Petrochemical process machinery
- Municipal infrastructure and power utilities
Industries served:
Mining · Petrochemical · Municipal · Metallurgy · Power generation · Water treatment
Mining · Petrochemical · Municipal · Metallurgy · Power generation · Water treatment
These systems reduce starting inrush current, prevent mechanical stress, improve operating stability, and significantly reduce energy losses.
System Composition & Cabinet Structure
| Section | Features |
|---|---|
| Bypass Cabinet | Enables automatic/manual switching to bypass VFD Supports system bypass operation during fault conditions Ensures production continuity |
| Transformer Cabinet | Includes isolation transformer, temperature sensors, current and voltage detection devices Provides stable three-phase power supply Protection functions: overload, over-current, overheat Independent cooling duct design to extend lifespan |
| Power Unit Cabinet | Modular power cells with standardized structure High dust & humidity resistance Optical fiber communication for high EMC immunity Scalable multi-cell parallel configuration |
| Control Cabinet | ARM + FPGA + DSP control cores 7-inch HMI multilingual interface Remote monitoring & expansion support Passed EMC & vibration certifications |
Series Models & Capacity Range
| Model Series | Voltage / Power Range | Cooling | Suitable Loads |
|---|---|---|---|
| Standard MV VFD | 6 kV: 200–5000 kW (2/6-pulse) 10 kV: 200–9000 kW (2/6-pulse) 6 kV: 200–2500 kW (4/9-pulse) 10 kV: 200–3250 kW (4/9-pulse) |
Forced air cooling | Fans, pumps, compressors |
| Integrated MV VFD | 6 kV: 200–560 kW 10 kV: 200–1000 kW |
Forced air cooling | Fans, water pumps, compact systems |
| Water-Cooled MV VFD | 6 kV: 6000–11500 kW 10 kV: 10500–19000 kW |
Water cooling | High-power rolling mills, compressors, large blowers |
Technical Specifications
| Specification | HY-BP37/38-F | HY-BP37/38-T |
|---|---|---|
| Motor Power | 200–20000 kW | 200–3250 kW |
| Rated Voltage | 6 kV / 10 kV | |
| Output Overload Capability | 105% 1 min / 130% 1 min / 150% 3 s | |
| Output Waveform | Multilevel SPWM | |
| Input Voltage Range | 6 kV ±10%~+10%; 10 kV ±10%~+35% | |
| Frequency Range | 0–10 Hz soft start Vector / V/F control |
|
| Efficiency | ≥98% | |
| Power Factor | ≥0.95 | |
| Ramp Time | 0.1–6000 s adjustable | |
| Control Algorithm | PID, torque boost, V/F switching, multi-loop control | |
| Auxiliary Power | AC 220V 2 kVA | |
| Operation Modes | Local HMI / Cabinet operator / Remote PLC / Upper computer control | |
| Output Protection | Over-voltage / under-voltage / over-current / unit fault / grounding / short circuit | |
| Installation | Indoor | |
| Ambient | −10°C to +40°C, ≤90% RH | |
| Vibration | ≤5m/s² | |
| Insulation / Protection | IP31 air cooling / IP40 water cooling |
Key Advantages
✔ Multilevel topology ensures low harmonics & low dv/dt
✔ High system reliability and redundancy design
✔ Modular power cells for easy maintenance
✔ Significant energy savings under variable load
✔ Smooth start reduces mechanical impact
✔ Extensive protection & self-diagnostic capability
✔ Suitable for harsh industrial environments
✔ High system reliability and redundancy design
✔ Modular power cells for easy maintenance
✔ Significant energy savings under variable load
✔ Smooth start reduces mechanical impact
✔ Extensive protection & self-diagnostic capability
✔ Suitable for harsh industrial environments
Application Scenarios
- Mining ventilation systems
- City water supply and pumping stations
- Oil & gas pipeline pressurization
- Metallurgical rolling mills
- Power station auxiliary drives
- Petrochemical rotating machinery
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