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Help Center660V Medium Voltage Variable Frequency Converter Drives for Blowers
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Certification:CE
660V Medium Voltage Variable Frequency Converter Drives for Blowers
Blowers are widely used in cement, textile and steel plants. We take the blowers in clean room for example.
A clean room is virtually dust and/or bacteria free. Clean rooms are used in laboratory work and in assembly or repair of precision equipment. A clean room fan supplies clean air through ventilation systems. This fan runs a system that filters exterior air, maintains temperature and humidity at constant levels, and circulates the interior air through a high-performance air filter while expelling part of the interior air.
Application Challenges
·Maintain positive pressure in the clean room.
·Maintain a high quality filtering system at all times.
·Avoid mechanical resonance in the surrounding equipment.
·Detect clogged fans or air ducts automatically.
Features of G11 matching blower application
|
Features |
Benefits |
|
Open Loop Vector and V/Hz Control with Torque Compensation |
Provides excellent breakaway torque for thick materials and constant torque to maintain mixing speeds under heavy loads. |
|
Preset frequency reference |
Preset mixing patterns can be established for different materials. |
|
Auto-Restart after momentary power loss |
Mixing can quickly restart after fault or momentary power loss. This keeps perishable foods from spoiling in process. |
|
Power loss Ride-Through |
The mixing process in not interrupted during brief power loss (< 5 ms). |
Power range of G11 VFD
Voltage: 660VAC (450VAC – 690VAC)
Power: 22kw/30HP – 400kw/535HP
Specification of G11 VFD
|
Item |
Specification |
|
Input frequency |
50/60Hz |
|
Output frequency |
0-400Hz |
|
Overload current |
150% rated current 1min. |
|
Control mode |
Close-loop vector control, sensor-less vector control, V/F control |
|
Starting torque |
150% 1hz (with PG 0hz) |
|
Control precision |
±0.2% (With PG ±0.02%) |
|
Torque precision |
±5% |
|
Setting frequency resolution |
Digital command 0.01hz; analog command 0.03hz/60hz |
|
Output frequency resolution |
0.01Hz |
|
Frequency setting signal |
-10V~+10V；0~+10V(20kΩ)；4~20mA |
|
Protection function |
Over voltage, under voltage, over load, relay, overheat speed stall, grounding, instant power cut compensation( within 2 sec for operation mode. Continue to operate after the power is available), Charging protection( not to display when the dc voltage of main circuit is less than 50v) |
|
Enclosure |
IP20 |
|
Cooling mode |
forced air cooling |
|
Vibration |
Less than 0.2g for 20hz |
|
Ambient temperature / Humidity |
-10 Degrees~+40 Degrees / 20~90%Rh (no condensation) |
Tips:
A variable-frequency drive (VFD) is a system for controlling the rotational speed of an alternating current (AC) electric motor by controlling the frequency of the electrical power supplied to the motor. A variable frequency drive is a specific type of adjustable-speed drive. Variable-frequency drives are also known as adjustable-frequency drives (AFD), variable-speed drives (VSD), AC drives, microdrives or inverter drives. Since the voltage is varied along with f
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