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Modular Active Harmonic Filter — 100–300 A, 400 V / 690 V
The modular active power filter (APF) uses rack-mounted power modules that can be paralleled to build the required compensation current. Rated 100–300 A per module at 400 V or 690 V, it measures the load current and injects a phase-opposite current to cancel harmonics, reducing total harmonic current distortion (THDi) to below 5% and improving power factor at the point of common coupling.
Key Features
Modular, rack-mounted power modules for flexible sizing
100–300 A compensation current at 400 V or 690 V
Reduces THDi to below 5%
Selective harmonic compensation (up to 25th order)
Parallel operation of multiple modules for higher ratings
Reactive power and unbalance compensation capability
Applications
- Data centers with UPS and switch-mode power supplies
- Industrial plants with variable frequency drives (VFD)
- Welding and electroplating lines
- Commercial buildings with LED and HVAC loads
- Water treatment and pumping stations
Specifications Range
All specifications and dimensions can be customized upon request
Model Selector
| Key parameters | Model Range |
|---|---|
| Capacity | 50–300 A |
| Rated Voltage | 0.4 |
| Frequency (Hz) | 50 |
| Standard | IEEE 519, IEC 61000-3-6 |
Product Drawing
Electrical Equipment - APF-M-150
Note: This is a general product illustration. For detailed technical drawings and specifications, please contact our engineering team.
- Frequently Asked Questions
How does an active harmonic filter reduce THDi?
The APF continuously samples the load current, extracts the harmonic content, and injects an equal-and-opposite current so the harmonics cancel at the measurement point, typically reducing THDi to below 5%.
What is the difference between modular and cabinet APF?
Modular APF is built from parallel rack modules that scale in 100–300 A steps and allow N+1 redundancy, while cabinet APF packages the full rating in a single floor-standing enclosure.
Instant Selection & Quote Calculator
Select your specifications to get an estimated price instantly.
| Base price (interpolation) | $8,750 |
| × Product factor | ×1.0000 |
| × Country factor | ×1.0000 |
| × Copper-linked factor | ×1.0000 |
| + Options / accessories | $0 |
Complete equipment — no winding copper linkage
Reference prices are for estimation only and do not constitute a formal offer.
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