Ac Harmonic Filter
◆ Three-level technology, high power density
◆ Supports three compensation modes: harmonics, reactive power, and imbalance
◆ FPGA + ARM architecture, fast computing speed, and smarter interfaces
◆ Standard rack size, easy to install in various industry-standard cabinets
◆ Unique patented technology, completely independent air ducting, eliminating any PCBAs or electronic components
Products Description
Ac harmonic filer, a new generation of fully digital harmonic elimination devices independently developed and launched by our company, offer distinct advantages over traditional technologies: faster, smaller, more powerful, and easy to install, maintain, and debug, they can easily resolve power quality issues.
Ac harmonic filers utilize power electronics technology. The main circuit includes: circuit breakers, fast-acting fuses, surge protectors, main contactors, snubber contactors, grid-connected inductors, LC filters, converters, and DC energy storage capacitors.
The control system of the active haromonic filter incorporates a DSP+FPGA, command current calculation circuits, and current tracking control circuits to enable parameter setting and control command acquisition. The power harmonic filer uses a current transformer to detect the load current. A data processing chip converts the analog signal into a digital signal, which is then sent to the internal DSP. Through algorithmic processing, the signal is extracted from the harmonic components of the load current. The control system then issues a command signal, which uses SVPWM control as a drive signal to control the internal IGBTs. This instructs the inverter to generate a harmonic current equal in magnitude and opposite in direction to the load harmonic current, which is then injected into the grid to filter out the harmonics.
Data Sheet
| Electrical parameters | |
| Wiring method | Three-phase three-wire, three-phase four-wire |
| Operating voltage | 380V(±20%) |
| Operating frequency | 50/60Hz, ±10% |
| Product specifications | 50,75,100A,150A,200A |
| Current transformer specifications | 50:5 ~ 30000:5 |
| Noise | ＜65dB |
| Features | |
| Switching devices | IGBT |
| Switching frequency | >20kHz |
| Heat dissipation methods | Intelligent air cooling |
| Heat dissipation control | Adaptive fan speed adjustment |
| Protection functions | Overvoltage, undervoltage, overheating, overcurrent, short circuit protection |
| Compensation performance | |
| Harmonic filtering rate | ＞95% |
| Active power loss | ＜3% |
| Harmonic filtering range | Harmonics from 2nd to 50th can be individually controlled and configured. |
| Total response time | ＜10ms |
| Resonance suppression | Active inhibition |
| Display Interface | |
| Display screen | 7-foot full-color touchscreen (cabinet type) |
| Language | Chinese, English, and customizable languages |
| Battery display | Distortion rate, power factor, power, voltage, current, and other data display |
| Communication interface and protocol type | RS485, Modbus protocol |
| Environmental conditions | |
| Operating temperature | -10℃~+40℃ |
| Relative humidity | <95%, no condensation |
| Altitude | <5000 meters (above 1000 meters, capacity decreases by 1% for every additional 100 meters) |
| Others | |
| Protection level | IP20 rating, other ratings available upon request. |
| Installation method | Rack-mount, wall-mount, integrated cabinet configurations. |
Q&A
1. Are active harmonic filters suitable for inverter-intensive processes?
Absolutely. Active harmonic filters are designed for applications with high VFD usage, such as water treatment plants, wastewater treatment plants, HVAC systems, industrial plants, and hospitals. They effectively control total harmonic distortion (THDi), ensuring your system meets power quality standards.
2. What happens if the active harmonic filter fails? Will my production stop?
No. Because the L-HTS800M is an active harmonic filter connected in parallel with your load, your processes will continue to run even if the filter goes offline. This makes it more reliable than active front-end drives, which can cause system shutdown if they fail.
3. How quickly does an active harmonic filter react to interference?
Active harmonic filters can react within microseconds. They ensure stable operation even for rapidly changing or sensitive loads such as welding equipment, elevators, cranes, and medical equipment.
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