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Guangzhou Bedford Electric Equipment Co., Ltd.

Power Saver, Energy Saver, Power Energy Saver manufacturer / supplier in China, offering Economic Sensorless Vector Control Constant Pressure Power Energy Saver, 220V/380V Solar Water Pump Inverter Without Battery, Automatic AC Variable Frequency Inverter Single Phase 220V and so on.

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Supplier Homepage Product Vector Sensorless frequency inverter/VFD Economic Sensorless Vector Control Constant Pressure Power Energy Saver

Economic Sensorless Vector Control Constant Pressure Power Energy Saver

FOB Price: US $77 / Piece
Min. Order: 5 Pieces
Min. Order FOB Price
5 Pieces US $77/ Piece
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Port: Guangzhou, China
Production Capacity: 9000 Piece/Pieces / Month
Payment Terms: T/T

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Basic Info
  • Model NO.: B504
  • Output Type: Single or Triple
  • Switch Mode: PWM Control
  • Voltage of Power Supply: Low Voltage Variable-Frequency Drive
  • Nature of DC Power: Voltage Variable-Frequency Drive
  • Brand: All
  • Control Method: Sensorless Vector Control, V/F Control
  • Output Phase: Three Phase 220V/380V
  • Trademark: BEDFORD
  • Origin: Guangzhou, China
  • Application: High-performance Transducer
  • Principle of Work: PLC Control
  • Main Circuit Type: Voltage
  • Link of Transformation: AC-DC-AC Variable-Frequency Drive
  • Function: Mini Machinery
  • Power Range: 0.5HP~3HP(0.4kw~2.2kw)
  • Input Phase: Single Phase 220V or Three Phase 380V
  • Color: Deep Black
  • Transport Package: in Ctns and in Wooden Cases
Product Description
Product Brief
Variable Frequency Drive: Single or 3 phase, PID Control Function, Up to 25 fault protections, Automatic Voltage Regulation (AVR) Function, multi-step speed, multiple torque setting source, output freq. 0.1~600Hz
The combination of multi- modes and switching between different modes can be realized.

B504 Economic sensorless vector control inverter:
Power Range:
Single phase 220± 15% 0.5HP~3HP (0.4KW~2.2KW)
Three phase 380± 15% 1HP~3HP (0.75KW~2.2KW)

B 504  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  6 00Hz

Frequency resolution

Analog input volume:0.1Hz

Overloading capacity

Rated output current :     150%-1 minute

                    1 80 %- 10  seconds

Transmitter signal

0~10mA, 4~20mA ,0~20mA

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 20

Economic Sensorless Vector Control Constant Pressure Power Energy Saver
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