Constant Pressure water supply frequency converter

Features

Constant Pressure water supply frequency converter:Introduction
Special for constant pressure water supply system
Plastic case
Build-in more than 10 years' water treatment experiences
Installed on the pump directly
Modbus communication for master-slave pumps
1AC 220V, 0.4~2.2kW
3AC 220V, 0.4~4kW
3AC 380V, 0.75~7.5kW
Fully automatic operating
Infineon IGBT inside
Easy installtion, easy commissioning
High control accuracy
Robust design
Very less wiring connection
Constant Pressure controlled stably

Constant Pressure water supply frequency converter
Specifications
Features
Selection
Pressure water supply frequency converter: Specifications

Item

Technical Index

Specification

Input

input voltage

1AC/3AC 220~240V±15%, 
3AC 380~460V±15%

Input frequency

50 / 60Hz±5%

Output

Output voltage

0~rated input voltage

Output frequency

0~100Hz

Control Features

Control mode

Manual control
Auto control

Operation command mode

Keypad control
Terminal control
Serial communication control (Modbus)

Overload capacity

150% / 60s, 180% / 10s, 200% / 1s.

PID control

Built-in PID control standardly.

Automatic voltage regulation

Keep output voltage constant automatically when input voltage fluctuating

Main

Protection

Functions

Pressure

Upper limit protection

Lower limit protection

Lack of water

Lack of water protection

Motor

Motor overload protection

Rust-proof & freeze-proof

Rust-proof and freeze-proof protection

Pipeline

Pipeline broken protection

Applications

Water supply system

Deep well pump, submersible pump, sewerage pump, pipeline pump, booster pump, multistage pump, centrifugal pump etc.

Special for living water supply system, hot water supply system, high-rise water supply system, fire fighting water supply system, sewer system and irrigation system etc.

Human machine interface

LED display

Pressure setting, system pressure, output frequency, output voltage, output current, etc.

Two lines display.

Environment

Ambient temperature

-10~50°C, without direct sunshine.

Humidity

90%RH or less (non-condensing).

Altitude

≤1000M: output rated power, >1000M: output derated

Storage temperature

-20~60°C

Pressure water supply frequency converter: Features

 
Easy installation
1

Mounted on the pump directly, without additionla cabinet.
2

Modbus communication, very less wiring connection.
3

Multiple pumps system, only one pressure sensor is necessary.
 
Easy operation
1

Few parameters setting.
2

Press-to-go, fully automatic running.
3

Pressure setting can be changed easily.
 
Smart master-slave control
1

Master inverter and slave inverter can be operated alternately, prolong the pump's life time.
2

Pumps are switched smoothly, no pressure vibration.
3

Pumps are increased / decreased automatically, alwasy keep constant pressure.


一 1 .Schematic diagram of four constant pressure water supply

一 2.Four constant pressure water supply wiring diagram


Pressure water supply frequency converter: Selection

Inverter Model

Pump

Rated Input Current (A)

Rated Output Current (A)

kW

HP

    1AC 220~240V±15%

KD388-00040S2

0.4

0.5

5.4

2.3
KD388-00075S2 0.75 1 8.2 4

KD388-00150S2

1.5

2

14

7
KD388-00220S2
2.2
3
24
9.6

  3AC 220~240V±15%
KD388-00040T2 0.4 0.5 3.4 2.3
KD388-00075T2 0.75 1 5 4
KD388-00150T2 1.5 2 9.5 7
KD388-00220T2 2.2 3 11 9.6
KD388-00400T2 4 5 20.5 17

    3AC 380~460V±15%
KD388-00075T4
0.75
1
3.4
2.5
KD388-00150T4
1.5
2
5
3.8

KD388-00220T4
2.2
3
6.5
5.1

KD388-00400T4

4

5

11

8
KD388-00550T4
5.5
7.5
20.5
13

KD388-00750T4

7.5

10

27

17