25 hp (18.5 kW) VFD, three phase 240V, 420V, 480V variable frequency drive, IP20, RS485 enabled, brand new direct sale by Chinese manufacturer with wholesale price.
Free shipping
Delivery date: 6 - 12 Days
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$1,149.00
$992.18
25 hp (18.5 kW) high performance variable frequency drive, three phase 240V, 420V, 480V for selection.
Specification:
| Basics |
Model |
GK3000-4T0185G/ GK3000-2T0185G |
| Capacity |
25 hp (18.5 kW) |
| Shipping weight |
18 kg |
| Dimension |
423*258*230 mm |
| I/O Feature |
Rated current |
37A at 380V ~ 480V, 75A at 220V ~ 240V |
| Input voltage |
3 phase 240V /420V /480V AC ±15% (Optional) |
| Input frequency |
50Hz/ 60Hz |
| Output voltage |
3 phase AC 0~input voltage |
| Output frequency |
0.00~400.00Hz |
| Over load capacity |
150% of rated current for 1 minute, 180% of rated current for 3 seconds |
| Control Feature |
Control mode |
V/F control;
Sensorless vector control; |
| Communication |
RS485 |
| Speed regulation |
1:100 |
| Start torque |
150% of rating torque at 1 Hz |
| Speed control accuracy |
≤±0.5% of rating synchronous speed |
| Frequency precision |
Digital setting: max frequency x± 0.01%;
Analog setting: max frequency x± 0.2% |
| Frequency resolution |
Analog setting: 0.1% of max frequency;
Digital setting: 0.01Hz |
| Torque boost |
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 |
| Environment |
Enclosure rating |
IP 20 |
| Temperature |
–10℃~ +40℃; VFD will be derated if ambient temperature exceed 40℃; each rise 1℃, the derate will be 5% |
| Humidity |
5%-95%, without condensation |
| Altitude |
≤1000m; VFD will be derated if above 1000m |
| Impingement and oscillation |
Normal running:<5.9m/s2 (0.6g); Transportation:<15m/s2 (1.5g) |
| Store environment |
–20℃~ +60℃; no dust, no corrosive gas, no direct sunlight |
Tips: What kind of VFD is appropriate for running a high static inertia load?
The reason many variable frequency drives (VFD) have issues with high inertia loads has NOTHING to do with the VFD electronics but rather the motor components including all the mechanics. What happens is that the very large mass of the inertia makes the mechanics (shafts) act like springs. (Normally very stiff but now taxed with load). This brings the mechanical resonances down where the control loops want to operate. This is why normal VFD systems with large inertia loads can not have high gains. Gozuk, and others, offer VFDs that can drive motors with high inertia loads. These big diameter torques can eliminate all the 'springs'. If you are serious - focus on stiff mechanics.
Often beam pump controllers in the oil field are exposed to high transients, high overhauling loads along with power interruptions. Many of the VFDs have active front end so the harmonic signature is low and the overhauling energy can be placed back on to the grid. In case of a power failure all of these AFE VFDs have brake choppers and resistor banks installed to absorb the overhauling energy.
Existing reviews
With this inverter, the machine runs more stably. the IP20 protection and RS485 communication function are very practical and the price is very competitive.
By
aym
on 09/07, 2024
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