DC-DC CONVERTERS AND BATTERY CHARGERS
FAFW active harmonic filters
Country: France · Model: FAFW
FAFW active harmonic filters work in 380–480 V networks at 47–63 Hz and compensate a current of 30–100 A. They suppress harmonics up to the 50th (51st) inclusive and compensate reactive power and load unbalance. They are installed in supply panels of frequency drives, UPS units, rectifiers and IT loads.
- Voltage
- 380–480 V, 47–63 Hz
- Compensation current
- 30–100 A (modular FAFW34030 with expansion)
- Harmonics
- up to the 50th (51st) harmonic, THDi < 5%
- Response time
- < 300 µs
Technical specifications
| Voltage | 380–480 V, 47–63 Hz |
|---|---|
| Compensation current | 30–100 A (modular FAFW34030 with expansion) |
| Harmonics | up to the 50th (51st) harmonic, THDi < 5% |
| Response time | < 300 µs |
| Protection degree | IP20 |
| Parallel operation | up to 5 filters |
| Communication | Ethernet, RS485, Modbus |
Specifications are taken from the manufacturer’s technical documentation. Updated .
Description
The filter measures the load current, extracts the harmonic components and injects into the mains a current of opposite phase, reducing THDi below 5%. The response time is below 300 µs, so the device keeps up with fast load changes of welding posts or drives. The modular version FAFW34030 allows expansion as the plant load grows. For larger currents up to 5 filters are connected in parallel. The IP20 protection degree means installation in a cabinet or in a closed electrical room. For integration into a metering and energy management system there are Ethernet, RS485 and the Modbus protocol. Unlike a passive LC filter, an active one is not tuned to a single frequency and does not resonate with capacitor banks.
How to choose
The rating is selected from the harmonic current to be compensated, not from the full load current. It is determined by measurements with a power quality analyzer at the connection point. If the measured harmonic current fits within 30–100 A, one filter is enough; otherwise several are installed in parallel, up to 5 units. For networks where the problem is reactive power without significant harmonics, a capacitor bank will be cheaper.
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FAFW active harmonic filters. We reply within one business day.
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FAQ
What is the compensation current of the FAFW active filter?
From 30 to 100 A depending on the model, and the modular FAFW34030 can be expanded.
Up to what order does FAFW suppress harmonics?
Up to the 50th (51st) harmonic inclusive, with THDi reduced below 5%.
How fast is the FAFW filter?
The response time is below 300 µs, so the filter handles abrupt load changes without noticeable delay.
How many FAFW filters can be connected in parallel?
Up to 5 filters, which makes it possible to compensate harmonic currents larger than the rating of a single device.
For what mains voltage is FAFW suitable?
For three-phase networks of 380–480 V at 47–63 Hz, with connection via Ethernet, RS485 or Modbus to a monitoring system.
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