Discounted 50 hp (37 kW) VFD, three phase 220V, 400V, 460V energy saving variable frequency drive for motor speed controls, brand new direct sale by manufacturer with fast delivery.
Delivery date: 6 - 12 days
50 hp (37 kW) variable frequency drive for energy savings, three phase 220V, 400V, 460V for selection.
||50 hp (37 kW)
||3 phase 220V /400V /460V AC ±15% (Optional)
||50 Hz / 60 Hz
||3 phase AC 0~input voltage
|Over load capacity
||150% of rated current for 1 minute, 180% of rated current for 3 seconds
Sensorless vector control;
||150% of rating torque at 1 Hz
|Speed control accuracy
||≤±0.5% of rating synchronous speed
||Digital setting: max frequency x± 0.01%;
Analog setting: max frequency x± 0.2%
||Analog setting: 0.1% of max frequency;
Digital setting: 0.01Hz
||Automatic torque boost, manual torque boost 0.1%~30.0%
|Interior PID controller
||Be convenient to make closed-loop system
|Automatic energy save running
||Optimize V/F curve automatically based on the load to realize power save running
|Automatic voltage regulation (AVR)
||Can keep constant output voltage when power source voltage varies.
|Automatic current limiting
||Limit running current automatically to avoid frequent over-current which will cause trip
||–10℃~ +40℃; VFD will be derated if ambient temperature exceed 40℃; each rise 1℃, the derate will be 5%
||5%-95%, without condensation
||≤1000m; VFD will be derated if above 1000m
|Impingement and oscillation
||Normal running:<5.9m/s2 (0.6g); Transportation:<15m/s2 (1.5g)
||–20℃~ +60℃; no dust, no corrosive gas, no direct sunlight
Tips: Protect motor from bearing failure with a correctly specified VFD.
A correctly specified and installed variable frequency drive (VFD) system will not damage bearings or motor equipment, it will actually prolong and protect the motor and extend its life. It is important to talk to your VFD manufactures engineers to find out how to do this as it does not just happen by buying the cheapest VFD you can find, and do not buy the cheapest motor either. Buy one that is designed for VFD service.
Whatever the performance of the VFD, the most important thing is to protect your motor from the VFD induced shaft current which will ultimately destroy the motor bearings (or whatever is connected downstream in case the motor have insulated bearings). A lot of people have mistaken the failure of the bearings as mechanical failure. However, if you cut opened the failed bearing and notice fluting (washing board pattern) or frosting (white line along the wall), this is proof that there have been electrical discharge through the bearing.
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