Delivery Time:2 days
Certification:CE

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

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.
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

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