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filtering 2-51th harmonic current for three phase 208-690V/50(60)Hz system of with 100~1000A rating CT sampling from grid or loads side.
LVAF-0.4-200
Floor standing
Sanhe
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Specific information:
LVAF active power filter is a new power electronic device of dynamically suppressing harmonics, reactive power compensation, through real-time detection of the load current waveform and DSP calculation, to obtain content of load current harmonic, then a PWM signal to inverter controlled by IGBT, such, to produce a current as big as load harmonic current but opposite direction into power supply system. Finally, the harmonic is filtered.
Feature:
Adopt the latest IGBT technology with a high switching frequency up to 35KHz
Quick responses and minimal thermal-and electric energy losses
Quickly responding DSP+FPGA processors control the platform.
DSP full digital control systems, which can immediately respond to load changes
Unique spacious design for best thermal management.
Best-in-business three level topology that can better offset the current approach to the sine wave compared with additional two-level inverters.
Application:
Rectifier devices(electrolysis, electroplate)
AC/DC Variable Speed Drive
DC Power Systems/Chargers
Arc Welding furnace, Induction Heating Equipment
Welding Machines
Electric Training, Marine electric drive
Air condition
Fluorescent Lamps
Uninterruptible Power Supplies (UPS)
Computers and Peripherals
Technical data:
Rated voltage: 0.4kV
Frequency: 45Hz ~ 63Hz
Efficiency: 97%
Filtering capacity: THDi (current distortion rate) < 5%
Response time: less than 15ms
Communication interface: RS485, network port
Communication protocol: the power of the general protocol, Modbus protocol, TCP/IP
Protection grade: IP20, the remaining IP grade can be customized
Standard:
GB/T 14549-1993 "Power Quality Public Power Grid Harmonics"
JB/T 11067-2011 "Low Voltage Active Power Filter Device"
IEEE519-1992 standard.
Model Guide
Model | Capacitance（A） | Dimension (W×D×H mm) | Structure | Wiring |
LVAF-0.4-25 | 25 | 405×178×260 | Module | Three phrase, three lines/ Three phrase, four lines |
LVAF-0.4-50 | 50 | 440×680×176 | Module | |
LVAF-0.4-100 | 100 | 800×800×2200 | Module | |
LVAF-0.4-200 | 200 | 800×800×2200 | Cabinet | |
LVAF-0.4-300 | 300 | 800×800×2200 | Cabinet |
Primary Electrical Diagram
FAQ
Q: What is APF Working principles ?
A: 1.External current transformer(CT)could detect real-time load current .
2.Internal DSP calculates and analyzes the reactive power content of the system.
3.Control PWM to send signal to IGBT to generate reactive power compensation current for power factor compensation.
Q: How to choose the model number?
A:Please specify the APF rated voltage,frequency ,3p3w/3p4w,rated capacity,CT sampling position(grid or load side).
Q: How is the usage effect?
A: It can resolve harmonic current problem, the below picture is comparison.
Specific information:
LVAF active power filter is a new power electronic device of dynamically suppressing harmonics, reactive power compensation, through real-time detection of the load current waveform and DSP calculation, to obtain content of load current harmonic, then a PWM signal to inverter controlled by IGBT, such, to produce a current as big as load harmonic current but opposite direction into power supply system. Finally, the harmonic is filtered.
Feature:
Adopt the latest IGBT technology with a high switching frequency up to 35KHz
Quick responses and minimal thermal-and electric energy losses
Quickly responding DSP+FPGA processors control the platform.
DSP full digital control systems, which can immediately respond to load changes
Unique spacious design for best thermal management.
Best-in-business three level topology that can better offset the current approach to the sine wave compared with additional two-level inverters.
Application:
Rectifier devices(electrolysis, electroplate)
AC/DC Variable Speed Drive
DC Power Systems/Chargers
Arc Welding furnace, Induction Heating Equipment
Welding Machines
Electric Training, Marine electric drive
Air condition
Fluorescent Lamps
Uninterruptible Power Supplies (UPS)
Computers and Peripherals
Technical data:
Rated voltage: 0.4kV
Frequency: 45Hz ~ 63Hz
Efficiency: 97%
Filtering capacity: THDi (current distortion rate) < 5%
Response time: less than 15ms
Communication interface: RS485, network port
Communication protocol: the power of the general protocol, Modbus protocol, TCP/IP
Protection grade: IP20, the remaining IP grade can be customized
Standard:
GB/T 14549-1993 "Power Quality Public Power Grid Harmonics"
JB/T 11067-2011 "Low Voltage Active Power Filter Device"
IEEE519-1992 standard.
Model Guide
Model | Capacitance（A） | Dimension (W×D×H mm) | Structure | Wiring |
LVAF-0.4-25 | 25 | 405×178×260 | Module | Three phrase, three lines/ Three phrase, four lines |
LVAF-0.4-50 | 50 | 440×680×176 | Module | |
LVAF-0.4-100 | 100 | 800×800×2200 | Module | |
LVAF-0.4-200 | 200 | 800×800×2200 | Cabinet | |
LVAF-0.4-300 | 300 | 800×800×2200 | Cabinet |
Primary Electrical Diagram
FAQ
Q: What is APF Working principles ?
A: 1.External current transformer(CT)could detect real-time load current .
2.Internal DSP calculates and analyzes the reactive power content of the system.
3.Control PWM to send signal to IGBT to generate reactive power compensation current for power factor compensation.
Q: How to choose the model number?
A:Please specify the APF rated voltage,frequency ,3p3w/3p4w,rated capacity,CT sampling position(grid or load side).
Q: How is the usage effect?
A: It can resolve harmonic current problem, the below picture is comparison.