75A Active Harmonic Filter AHF Floor Standing Cabinet 380V 3P4W Multi Function Power Quality DeviceThe ND-APF-75-FS is a 75A floor-standing cabinet developed by Shanghai NengDu for low voltage power quality correction. As a true Active Harmonic Filter AHF, it detects harmonic currents in real time and injects equal and opposite compensation currents into the network, canceling harmonics at the source. This Active Harmonic Filter AHF eliminates harmonic oscillations, reduces electricity costs and protects transformers, cables, capacitors and motors from overheating and premature failure.
Product IntroductionThe ND-APF-75-FS Active Harmonic Filter AHF is a multifunctional solution based on a high-speed DSP controller and IGBT power stage. It can be easily customized to provide power factor improvement, voltage change control, flicker mitigation and load balancing functions, greatly improving the power quality in the network while reducing harmonic pollution. The floor-standing cabinet integrates the Active Harmonic Filter AHF power stage, control system and protection devices in a single IP54 enclosure. It is delivered fully wired and tested, ready to be connected to the low voltage busbar, which shortens on-site commissioning time dramatically.
Every Active Harmonic Filter AHF unit is factory calibrated and fully tested before delivery. The user-friendly touch screen displays real-time harmonic spectra, compensation current, system voltage and fault records, while the RS485 interface allows remote monitoring and integration with plant power management systems.
Key Features
Precise harmonic filtering: Effectively eliminates 2nd to 50th order harmonics with high accuracy, keeping THDi below 5 percent even under rapidly changing loads.
Fast response and dynamic compensation: Real-time current detection with a response time of less than 10ms ensures the Active Harmonic Filter AHF reacts instantly to load changes.
Multi-function integration: Simultaneously compensates harmonics, reactive power and three-phase unbalance, improving overall power quality in the network.
High safety and stability: Active injection technology creates zero resonance risk with the power system, protecting sensitive equipment from harmonic amplification.
Compact size and flexible installation: Small footprint and flexible mounting options make the Active Harmonic Filter AHF suitable for limited spaces and retrofit projects.
Strong adaptability: Automatic adjustment under varying load conditions keeps filtering performance stable from light load to full load.
Energy saving and equipment protection: Reduces power loss in transformers, cables and motors, and extends the service life of electrical equipment.
IP54 dust and splash protection: Suitable for dusty workshops, textile mills and semi-outdoor electrical rooms.
Multi-function compensation: Simultaneously mitigates harmonics, corrects reactive power and balances three-phase loads in one cabinet.
Ready-to-connect cabinet: Factory wired, tested and shipped with a fully integrated cooling and protection system.
Why Choose Us- Shanghai NengDu has grown into a leading Active Harmonic Filter AHF manufacturer in China by combining senior power electronics expertise with rigorous quality management. Here is why customers choose our Active Harmonic Filter AHF products:
- Factory direct manufacturer: Shanghai NengDu is an industry-trade integrated manufacturer specializing in Active Harmonic Filter AHF research, development and production, with a senior power electronics engineering team.
- Strict quality control: Every unit passes 100 percent pre-shipment inspection including full-load harmonic filtering tests, and a 36-month warranty covers all products.
- Customized solutions: Our R&D center tailors Active Harmonic Filter AHF solutions based on your grid parameters, load types and harmonic mitigation requirements.
- OEM/ODM service: Custom logo, packaging and functions are supported, with paid samples available and the sample fee deductible from bulk orders.
- Factory visit welcome: You are welcome to visit our factory in Shanghai to audit the production line and testing facilities.
Technical Specifications| Parameter | Specification |
|---|
| Model | ND-APF-75-FS |
| Type | Active Harmonic Filter AHF (落地柜式) |
| Rated Current | 75A |
| Rated Voltage | 380V AC (3P4W) |
| Wiring System | Three-phase four-wire |
| System Frequency | 50/60Hz |
| Harmonic Compensation Range | 2nd to 50th order, selectable |
| Filtering Performance | THDi < 5% at full compensation |
| Response Time | Less than 10ms |
| Overload Capacity | 110% continuous, 120% for 1 minute |
| Reactive Power Compensation | Optional, 0 to 100% adjustable |
| Efficiency | Greater than or equal to 97% |
| Cooling Method | Forced air cooling with dust-proof filter |
| Protection Degree | IP54 |
| Display | 10 inch LCD touch screen |
| Communication Interface | RS485 / Modbus-RTU |
| Parallel Expansion | Up to 10 cabinets in parallel |
| Noise Level | No more than 55dB |
| Operating Temperature | -10°C to +45°C |
| Relative Humidity | 0 to 95%, non-condensing |
| Dimensions (W x D x H) | 600 x 600 x 1200mm |
| Weight | 95kg |
| Standards | GB/T 14549, IEC 61000-4-30, CE |
The floor-standing Active Harmonic Filter AHF serves medium-size industrial plants, commercial complexes, hospitals, stadiums and water treatment facilities where centralized power quality correction and easy installation are the priorities.
The Active Harmonic Filter AHF supports flexible scaling: parallel modules can be added for easy capacity expansion without system restructuring, making it ideal for long-term scalability in both new projects and retrofits.
Packaging & Quality AssuranceEach unit is packed in an export-grade wooden case with foam shock-proof protection. Quality assurance includes 100 percent pre-shipment inspection, a 36-month warranty and lifelong technical support. Documentation such as test reports, manuals and CE certificates is provided with every shipment.
FAQQ1: Why choose NengDu Active Harmonic Filter AHF products?
Advanced production equipment, strict quality control and a professional power electronics team. Factory visits are welcome at any time.
Q2: Are you a manufacturer or a trader?
We are an industry-trade integrated manufacturer specializing in NengDu Active Harmonic Filter AHF research, development and production in Shanghai, China.
Q3: Is OEM/ODM service available?
Yes. Custom logo, packaging and functions are supported according to your requirements.
Q4: Can you provide samples?
Yes, paid samples are provided. The client covers the sample and shipping cost, and the sample fee is deductible from bulk orders.
Q5: What is the lead time?
Standard lead time is 7 to 15 days, subject to order quantity and configuration.
Q6: What is the warranty period?
100 percent pre-shipment inspection is performed, and a 36-month warranty is provided for the Active Harmonic Filter AHF.
