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Sinopak Medium Voltage Variable Frequency Drives
Product Structure
Sinopak MVVFD includes integrated structure and split-type structure based on capacity. The integrated structure is adopted in low capacity MV VFD and the split-type structure is adopted in high capacity MV VFD. In terms of an integrated machine, which is compact in size, phase-transformer, power units, control systems, and power frequency bypass are fully integrated into one cabinet; In terms of a split-type machine, phase-transformer, power units, control systems and power frequency bypass are assembled in separate cabinets in which are combined on the spot.
Technical Parameters
Medium voltage input | Voltage range | 3KV, 3.3KV, 4.16KV, 6KV, 6.6KV, 10KV, 11KV (-20%~+15%) |
Frequency range | 50/60 Hz±10% | |
Medium voltage output | Output voltage | 0~Rated voltage |
Output frequency and accuracy | 0~50/60 Hz, 0.01 Hz | |
Output waveform | Multilevel PWM sin wave, total harmonic distortion (THD) <4% | |
Performance | Efficiency | Inversion efficiency at an rated load > 98.5%, overall efficiency (including the transformer) > 97% |
Power factor | Power factor (within the range of speed regulation) > 0.95, power factor (at a rated load) > 0.97 | |
Overload capacity | 110%: long-term stable operation, 120%: 1 minute, 150%: 2 seconds, and 160%: prompt protection | |
Allowable outage duration | 200 ms (and longer under light load) | |
Mean time between failures | > 100,000 hours | |
Control | Control mode | flux optimization and control with space vector PWM |
Acceleration/deceleration time | 1 to 3,600 seconds | |
Switching quantity input/output | 11-way/10-way | |
Analog input | 4-way (optional: 0 to 5 V, 4 to 20 mA) | |
Analog output | 3-way (optional: 0 to 10 V, 4 to 20 mA ) | |
Communications | RS485 interface, Modbus-based (optional Profibus-DP and Ethernet interfaces) | |
Control power supply | Single-phase 220 V AC, 5kVA | |
Excitation control ( dedicated for thesynchronous motor) | Control mode | Automatic excitation control, manual excitation control, multi-stage speed excitation control, and external excitation control for the MVVFD |
Environment | Operating environment | Operating in indoor environment without explosive or corrosive gases, conductive dust, or oil fog |
Operating ambient temperature | 0℃~+45℃ | |
Storage and transportation temperature | -40℃ ~+70℃ | |
Ambient humidity | <90% (No condensation) | |
Operating altitude | Derating required for an altitude greater than 1000 meters | |
Others | Protection function | Overcurrent, overload, short circuit, three phase current unbalance, immediate electric outage, input/output phase loss, overvoltage, undervoltage, body overheat, transformer overheat, shutdown due to external fault, and power unit auto bypass |
Cooling mode | Forced-air cooling | |
User interface | An 10-inch Human Machine Interface | |
Protection grade: IP31 | IP31 |
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