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High reliability 400KW AC variable voltage frequency inverter drives for water

High reliability 400KW AC variable voltage frequency inverter drives for water

Place of Origin : China
Brand Name : GANDO
Certification : CE
Model Number : 380V-P5-__KW
MOQ : 1 set
Delivery Time : 2 days
Payment Terms : TT, L/C, Western Union, Paypa
Supply Ability : 200 sets per week
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400KW AC Variable Voltage Variable Frequency Inverter Drives for Water Pump

A pump is a machine or device for raising, transferring, or compressing fluids. Pumps represent the largest single use of power in industry (31%) by motor driven equipment. Process variables, including pressure and flow of gases and liquids, have long been regulated using mechanical clutches, throttles, and adjustable inlet guide vanes. Pumps often operate as a variable torque load, a load that increases as the speed increases. These mechanisms waste energy, require frequent maintenance, and provide inaccurate control.

Pumps have two main categories:

1. Positive displacement pumps force a fixed volume of fluid from inlet to discharge with each stroke or rotation. (e.g., reciprocating, rotary, or screw type pumps)

2. Centrifugal pumps are the biggest class of pumps, which use the fluid's own momentum to build up pressure or head. Centrifugal pumps use centrifugal and hydrodynamic forces to create pressure that moves the fluid from inlet to discharge.

Pumps can also be classified by principle of operation and drive requirements.

  • Principle of Operation Application Served
  • Materials of Construction
  • Liquid Being Pumped
  • Shaft Orientation (Vertical, Horizontal)
  • Number of Stages
  • SuctionPortArrangement

Application Challenges

· Reduce energy costs
Motors use less energy as speed is reduced.

· Reduce demand charges
Drives reduce motor starting current 8-10 times.

· Variable and constant torque load characteristics, depending on pump type.

· The motor may spin backwards due to pump backpressure when stopped.

· Control of pressure and flow is desired.

· High reliability.

· Wide horsepower range for different pump sizes.

· Environmentally friendly (harmonic standards).

· Network communications.

Prevention of water hammer, pipe stress, valve, and pump seals and cavitation prevention.

Features of P5 series cooling tower Water Pump application



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.

Terminal control

Multiple control terminal, 6 DI, 4 DO, 2 AI, 4 AO, RS-485 support Modbus

Power range of P5 VFD

Voltage: 3 phase 380VAC(323VAC – 440VAC)

Power: 18.5kw/25HP – 400kw/535HP

Specification of P5 VFD



Input frequency


Output frequency


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



Cooling mode

forced air cooling


Less than 0.5g

Ambient temperature / Humidity

-10 Degrees~+40 Degrees / 20~90%Rh (no condensation)


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 frequency, these are sometimes also called VVVF (variable voltage variable frequency) drives.

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