Authorised DealerActive Harmonic Filter (AHF)
Harmonic control in electric power systems, to IEEE 519
Sinexcel active harmonic filters measure load current in real time, decompose it with an intelligent FFT algorithm and inject an equal and opposite compensation current — cancelling harmonic distortion generated by drives, rectifiers, UPS and other non-linear loads. The result is safe operation, improved energy efficiency and THDi within IEEE 519 limits. A.R Marketing & Services carries out the harmonic study, sizing, supply, installation and post-commissioning measurement reports in Mumbai and across India.
Typical harmonic loads
Rectifying devices
The largest harmonic loads. Fast-changing current is a constant challenge to power quality. Typical orders: 5th, 7th (6-pulse) and 11th, 13th (12-pulse).
Furnaces
The most difficult harmonic load to handle — a permanent dilemma between production process and power quality. Typical orders: 5th, 7th, 11th.
VFDs
The single biggest AHF application. Energy saving from drives comes at the cost of injected harmonics. Typical orders: 5th, 7th, 11th.
What makes Sinexcel AHF different
Intelligent Fast Fourier Transform
An iterative FFT algorithm built on Sinexcel's updated computing power and ten years of field harmonic waveform data. The AHF allocates compensation capacity in real time, self-learns system impedance and identifies each harmonic order individually.
- Real-time, synchronous allocation of compensation capacity
- Detects resonance points and stops compensating there to avoid amplifying resonance
- Continues compensating remaining orders while monitoring resonance in real time
- Re-runs self-learning and self-adjustment whenever the load or resonance point changes
3-level topology
One additional output level means far less ripple current — the high-frequency triangular current superimposed on the inverter output that degrades current quality.
- Output PWM waveform closer to a sine wave, better compensation effect
- Smaller LCL filter, enabling compact module design
- Lower inductance loss, higher system efficiency
- IGBT voltage stress halved: less switching loss, more thermal margin, higher switching frequency
Modular design & plug suite
Ultra-compact wall- and rack-mounted modules with fine capacity distribution, suited to space-constrained and retrofit projects. Easy to transport, replace and integrate into panels.
- Flexible engineering cabinets: plug cabinet, IP54, top or bottom cable entry
- Plug suite with monitoring system and alarm indication lights
- Customers can build their own plug cabinet on site — no wiring, quick unit replacement
- Cost-effective route to expansion and maintenance
Blade, Standard and PRO series
Sinexcel Blade AHF
Ultra-slim 45 mm MOSFET silicon-carbide module for commercial spaces — offices, retail and light installations where panel depth is at a premium.
- WiFi control: status and settings from phone, tablet or PC
- Silicon-carbide MOSFET design, switching up to 90 kHz
- Compensates 2nd to 61st order harmonics
- Compact enough to sit inside office closets and small panels
- Capacity
- 5 A / 10 A / 15 A
- Voltage
- 400 V (228 – 456 V)
- Harmonic filtering range
- 2nd – 61st orders
- Switching frequency
- Average 50 kHz, up to 90 kHz
- Dimensions (W×D×H)
- 410 × 340 × 45 mm rack / 410 × 45 × 340 mm wall
- Weight
- 4.98 kg
- Monitoring
- WiFi / LED / 7" HMI
- Wiring
- 3P3W / 3P4W (same unit)
- Rated frequency
- 50 / 60 Hz (auto sensing 45 – 62.5 Hz)
Sinexcel Standard AHF
The global No. 1 low-voltage AHF range by turnover. Single modules from 25 A to 300 A with unlimited parallel installation for plant-wide harmonic correction.
- 12 operation modes across harmonic filtering, reactive power and 3-phase balancing
- Priority logic e.g. “H+B+Q”: harmonics first, then balancing, residual capacity to reactive power
- Unlimited units in parallel for large installations
- Certifications: CE / UL / DNV / RINA / CCS / BV
- Capacity
- 25 / 35 / 50 / 60 / 75 / 100 / 150 / 300 A
- Voltage
- 220 V / 400 V / 480 V / 600 V / 690 V
- Harmonic filtering range
- 2nd – 50th orders
- Switching frequency
- Average 20 kHz
- Efficiency
- ≥ 97%
- Monitoring
- LED / 4.3" HMI / 7" HMI
- Wiring
- 3P3W / 3P4W (same unit)
- Rated frequency
- 50 / 60 Hz (auto sensing 45 – 62 Hz)
Sinexcel PRO AHF
98.5% peak efficiency flagship module. Every 0.5% efficiency gain counts: PRO delivers roughly 12,972 kWh of annual energy savings versus legacy 97% efficient products.
- 33% lower heat loss — longer service life, lower maintenance cost
- 390 CFM ventilation requirement, easier high-IP cabinet design
- Lower airflow means less fan noise for commercial installations
- Rack- or wall-mounted in the same enclosure
- Capacity
- 150 A
- Peak efficiency
- 98.5%
- Voltage
- 400 V (228 – 456 V)
- Harmonic filtering range
- 2nd – 50th orders
- Switching frequency
- Average 20 kHz
- Dimensions (W×D×H)
- 500 × 550 × 190 mm rack / 500 × 190 × 550 mm wall
- Weight
- 40 kg
- Monitoring
- LED / 4.3" HMI / 7" HMI
- Wiring
- 3P3W / 3P4W (same unit)
Applications
Sinexcel AHF worldwide
- Singapore CBD towers (Marina Bay Financial Centre, Asia Square, Guoco Tower) — 5,000 A+
- Microsoft Southeast Asia headquarters, Singapore — 1,800 A
- Chinese University of Hong Kong — 5,600 A
- Equinix data centre, Hong Kong — 800 A
- Icon Water treatment, Australia — 1,200 A
- Central Plains Water irrigation, New Zealand — 1,340 A