Gold Member Since 2009
Audited Supplier
Guangzhou Bedford Electric Equipment Co., Ltd.

Automatic Pump Controller, Water Pump Variable Speed Controllers, Water Pump Frequency Controller manufacturer / supplier in China, offering 2013 New VFD/VSD, 220V/380V Solar Water Pump Inverter Without Battery, Automatic AC Variable Frequency Inverter Single Phase 220V and so on.

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2013 New VFD/VSD

FOB Price: US $121 / Piece
Min. Order: 5 Pieces
Min. Order FOB Price
5 Pieces US $121/ Piece
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Production Capacity: 9000 Piece/Pieces / Month
Transport Package: Wooden Cases or as Per Customer′s Requirements
Payment Terms: T/T

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Basic Info
  • Model NO.: B603A/B
  • Output Phase: Single or Triple
  • Output Voltage: 0~Rated Input Voltage
  • Output Frequency: 0~600Hz
  • Color: Black and White
  • Origin: Guangzhou, China
  • Output Power: 750W~350kw
  • Input Voltage: 380V(Triple pH), 220V(Single pH or Triple pH)
  • Type: AC-DC-AC Inverter
  • Protection Rate: IP54
  • Trademark: BEDFORD
Product Description
Detailed product description:

B603A/B series intelligent constant pressure water supply controller is suitable for full-automatic operation, with characteristics of high quality, multi-functional, low noise and strong commonality etc.
There are no special demands for peripherals, it mainly use normal components, for example: Water detection use transducer, transmitter (include water level transmitter, temperature transmitter, etc. ) or inductive remote transmission pressure gauge, with output of 4~20mA, 0~5VDC and 0~10 VDC standard signal.

B603A/B intelligent constant pressure water supply controller:

Power range:

I B603A series Intelligent constant pressure pump controller
Single phase 220V input, 3 phase 220V output: 1HP-7HP(0.75KW-2.2KW)
Three phase 220V input, 3 phase 220V output: 1HP-75HP(0.75KW-55KW)
Three phase 380V input, 3 phase 380V output: 1HP-470HP(0.75KW-350KW)

II B603B series Intelligent constant pressure pump controller(water proof)
Single phase 220V input, 3 phase 220V output: 1HP-3HP(0.75KW-2.2KW)
Three phase 380V input, 3 phase 380V output: 1HP-3HP(0.75KW-2.2KW)

Function characteristics:

Multi-pump control: Can realize 1 master and max. 5 auxiliaries combine work

Sleep function: Sleep down when have no water consumption, to earn a better energy saving

Freeze-proofing function: Suitable to low temperature area, prevent pump from freezing

Anti-clogging function: Take precaution against pipe clogging and clean the pipe dirt

Power on restart: Running automatically when power on

Master fault shift automatically: Keep on working when the master break down

Alternate running: Balance every pump's running time, prolong service life of the whole unit machine

Day-part function: 3 independent day-part control, up to 7 day-part achieved when define separated

Two running mode: Synchronous control mode, master-slave control mode

Terminal control mode: Terminal run/stop, manual/auto control, electronic contact gauge control

Various of water supply fault alarm function: High-pressure, low-pressure, low-level, transducer error etc.

As many as 22 kinds of fault protection function: Over-current, over-voltage, low-voltage, phase-failure, over-load etc.

B 603B  series

200 1

200 2

200 3

4 00 1

4 00 2

4 0 03

Volt a ge

1 φ 200V-240V

3 φ 380 V- 440 V








Rated output vol.(V)

3 φ  220V-240V

3 φ  380V-440V

Rated output curre n t A

4. 5






Control mode

Sensorless Vector Control (SVC), V/F Control

Output frequency range

Maximum  5 0Hz

Frequency resolution

Analog input volume:0.1Hz

Overloading capacity

Rated output current :     150%-1 minute

                    1 80 %- 10  seconds

Transmitter signal


No.of V/F Patterns

Vector curve,  Random V/F curve


Indoor(protected from corrosive gases and dust)

Ambient  temperature

-10~4 0°C( If beyond the allowable degree,one degree will Derogate 5%  output current)

Storage temperature

-40~6 0°C

Environmental temperature

95%(without dew gather)


2M/ S 2  (0.2G)

Protection rate

IP 54
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