Active Power filter
Active power filter (APF) is designed to filter the harmonics injected by non-linear loads in power networks. It can analyze the line current harmonics drawn by the loads and generate a compensation current dynamically at the opposite phase angle, thereby “neutralizing” the harmonic currents.
Features
◎ Based on 3-Level topology circuit
◎ Modular design for a shorter delivery cycle and easy maintenance.
◎ Rack-mounted or wall-mounted design which can be easily combined and installed as needed.
◎ It is possible to compensate the 2nd~51st harmonics, or select a specific order of harmonics to compensate separately.
◎ Flexible compensation modes:
◎ Harmonic compensation
◎ Reactive power compensation
◎ Three phase imbalance compensation
◎ Harmonic +Reactive power +Imbalance
◎ Remote communication interfaces, with real-time monitoring being achieved via PC machines.
◎ A full automatic detection runs during the whole compensation process, and should it be restarted, self-diagnosis will function; then after the fault is removed, it will be automatically put into use.
◎ Free of harmonic resonance.
◎ A user-friendly human-machine interface is configured to operate, and display system’s real-time parameters like voltage/current waveforms, active power, reactive power, apparent power, power factor, harmonics, etc.
◎ Intelligent control circuit with perfect protection functions (against overvoltage, under voltage, over-heating, over current, etc.).
Technical Specifications
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Items
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Specifications
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Module capacity
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25A/35A, 50A/60A, 75A/100A
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Power supply voltage
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400V (-43%~+14%)
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Power supply frequency
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50/60Hz (Range: 45~63Hz)
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Wiring method
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3P3W/3P4W
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Harmonic spectrum
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2nd~50th
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Harmonic setting
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All harmonic contents can be selected simultaneously
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Efficiency
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Up to 98%
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Filter performance
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THDi<5%
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Neutral filtering capacity
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Three times of rated current
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Response time
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<15ms
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Reactive time
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<50μs
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Resonance protection
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Yes
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Cooling mode
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Forced air cooling
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Operation mode
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Harmonic compensation(FFT analysis, instantaneous reactive power)
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Reactive power compensation (-1~+1)
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Three phase imbalance compensation
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Switching frequency
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20kHz
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Power loss
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<3%
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Communication interface
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RS485 (Modbus RTU), TCP/IP (Ethernet)
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Digital I/O
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4DI/6DO
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Alarm events
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Yes
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Monitoring
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Via centralized monitoring PQ viewer
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Mounting type
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Rack/Wall mounted
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Protection level
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IP20
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Altitude
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1500m, if >1500m, the power decreases by 1% every 100m.
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Operation temperature
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-250C~+450C
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Relative humidity
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5%~95%, non-condensing
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Installation environment
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Indoor use
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Dimension W*D*H(mm)
And net weight
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25A/35S: 440*470*150 18KG
50A/60A: 440*590*190 35KG
75A/100A: 440*600*230 36KG
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Compliance with Standards
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IEEE 519, IEC 61000-3-6, ERG5/4
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