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Help CenterVariable Frequency Inverter Motor VFD Drives for Fans and Pumps
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Certification:CE
Variable Frequency Inverter Motor VFD Drives for Fans and Pumps
A cooling tower extracts heat from process cooling water. Common applications for cooling towers provide cooled water for air conditioning, manufacturing, and electric power generation.
A variable frequency drive can correctly identify the cooling tower fan rotation, slow the motor speed to zero (when opposite rotation is detected), and accelerate the fan in the correct direction. The VFD drive eliminates brakes, anti-ratcheting devices, and time delays. Running the fan slower, which raises tower and water temperatures, can prevent icing in cold weather. A VFD can reverse a cooling tower fan and keep the heat in the tower, if necessary. In warm weather, fans can be run faster, providing additional cooling capacity.
Application Challenges
Energy savings Reduce maintenance requirements (personnel and equipment replacement costs) Precisely control process water temperature stabilizationFeatures of P5 series cooling tower fan application
|
Features |
Benefits |
|
Dual digital tube |
Double lines of LED display, monitoring 2 kinds of information meantime, like frequency, current, voltage, speed and PID data. |
|
Smart restart |
Instant power off continue running and speed tracking |
|
S curve acceleration/deceleration mode |
S curve acceleration/deceleration can reduce impact to the machine at start/stop time, and suitable for the start/stop process for loads of handling and transmission categories. |
Power range of P5 VFD
Voltage: 3 phase 380VAC(323VAC – 440VAC)
Power: 18.5kw/25HP – 400kw/535HP
Specification of P5 VFD
|
Item |
Specification |
|
Input frequency |
50/60Hz |
|
Output frequency |
0-120Hz |
|
Overload current |
120% rated current 1min., 130% 6 sec. |
|
Control mode |
V/F control |
|
Brake torque |
125% with additional brake resistor |
|
Set frequency resolution |
digital command 0.01Hz; analogue command 0.1Hz/60Hz |
|
Voltage/Frequency feature |
34 fixed V/F features selectable, any V/F features can be set |
|
Running Mode |
Keyboard, control terminal, RS485 |
|
Output Voltage self-adjustment |
When AVR function is enabled, the input voltage changes, while the output voltage almost remains unchanged |
|
Frequency setting signal |
0-10V, 0-5V, 4-20mA, 0-20mA |
|
Protection function |
Over voltage, under voltage, current limit, over current, overload, electronic thermal relay, overheat, over voltage stalling, data protection, under load precaution, loaded short circuit |
|
Enclosure |
IP10 |
|
Cooling mode |
forced air cooling |
|
Vibration |
Less than 0.5g |
|
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 vari
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