Data Center 250A 480V Active Harmonic Filter AHF Floor Standing Cabinet for UPS Backup Lines

ND-AHF-250-480-C is a floor standing cabinet rated 250 A at 480 V AC (3P4W) built for 480V data centre distribution. 

The cabinet is configured for 480V UPS distribution, where the 5th and 7th orders from double-conversion rectifiers dominate the spectrum and grow with IT load.

The unit measures the load current continuously and injects an equal and opposite compensation current, so the grid current returns to a near sinusoidal shape while the load keeps running unchanged. Reactive power compensation and three-phase unbalance correction can be enabled on the same hardware, which means one Active Harmonic Filter AHF can replace a combination of capacitor banks, detuned reactors and balancing equipment.

Main technical characteristics of this 250 A 480 V Active Harmonic Filter AHF:

• Closed Forced Ventilation Duct
  Heat sources sit inside a dedicated duct, separated from dust-prone areas, so the internal temperature of the enclosure stays low.
• Industrial Control Chip with 16-bit AD
  A 16-bit analog front end keeps the compensation current accurate even when the load current carries steep, high-order distortion.
• Residual THDi Below 5%
  After compensation the grid current distortion is normally held under 5%, in line with IEEE 519 and GB/T 14549 recommendations.
• Parallel Expansion up to Ten Units
  Up to ten units share one CT signal, so capacity grows with the plant and N+1 redundancy becomes possible.
• Modular Plug-in Architecture
  Power modules slide in and out for maintenance, cutting mean time to repair during planned shutdowns.
• RS485 Modbus Reporting
  Standard Modbus-RTU output lets the filter report into a BMS, SCADA or energy management platform.
• Complete Internal Protection Chain
  Over-voltage, under-voltage, over-current, over-temperature, phase-loss and short-circuit protection act without external relays.
• Low Auxiliary Power Loss
  Auxiliary consumption stays a small fraction of rated current, so the unit does not become a new heat source in the room.

This Active Harmonic Filter AHF is normally installed on the following loads:

• 480V UPS output distribution boards
• Hyperscale and edge data halls
• Precision cooling and CRAH fan walls
• Backup generator and ATS linked boards
• Network core rooms with large rectifier banks

Reasons buyers select our Active Harmonic Filter AHF for projects in 480V data centre distribution:

• Full-Load Aging before Packing
  Every Active Harmonic Filter AHF runs a 24-hour full-load aging cycle and is inspected against its test record before shipment.
• Export Track Record
  We work with energy engineering distributors across Southeast Asia, the Middle East, Europe, America and Africa, with core cooperation in India, Germany and Saudi Arabia.
• Selection and Survey Support
  Our engineers review your harmonic measurement, calculate the required compensation current and issue a written selection report before you place an order.
• One-Stop Power Quality Supply
  AHF, SVG, intelligent capacitors, reactors and controllers come from the same factory, so interfaces and protocols match across the whole compensation room.
• Manufacturer Scope
  We are a Shanghai based power quality manufacturer with our own R and D labs, production workshops and a full-function test bay, so the algorithms, firmware, hardware and cabinet structure are all developed in house.

Typical configuration of model ND-AHF-250-480-C. Voltage class, current rating, CT ratio and enclosure can be adapted to your single line diagram.

Common questions about this Active Harmonic Filter AHF from project engineers and distributors:

• Technical Support
  Lifetime free remote technical support for commissioning, troubleshooting and parameter configuration by video call, WhatsApp or email.
• Training Materials
  Complete operation manuals, wiring diagrams and parameter explanations are supplied so your engineers can run the unit independently.
• On-Site Service
  Where overseas on-site commissioning is required, engineers can be dispatched abroad; travel and service fees are quoted separately.
• Warranty
  A limited warranty applies, with the specific period and terms confirmed in the project contract.
• Response Time
  After-sales and technical enquiries are answered within 24 working hours.
• Spare Parts Supply
  After the warranty period, spare parts are supplied at reasonable cost for the full service life of the equipment.

Nengdu New Energy is a Shanghai based high-tech manufacturer focused on integrated research, production, sales and after-sales service of power quality improvement equipment. The product line covers AHF active filters, SVG static var generators, intelligent capacitors, reactive power controllers, capacitor contactors, voltage adjusters, smart composite switches, dynamic reactive regulators and matching energy storage systems.

Standardised production workshops, dedicated R and D laboratories and a full-function testing workshop support in-house development of every algorithm, software, hardware platform and cabinet structure. Customised power equipment and complete turnkey solutions are supplied, and ODM cooperation is available for partners who need their own branding.

Products hold CE, IEC, RoHS and ISO certification. Long-term partnerships with energy engineering distributors span Southeast Asia, the Middle East, Europe, America and Africa, with core cooperation in India, Germany and Saudi Arabia. Our engineering team provides on-site power quality testing and calculation, equipment replacement matching, programming and commissioning guidance, plus permanent remote after-sales assistance.

Send us your single line diagram, harmonic measurement or load list, and our engineers will calculate the required compensation current and confirm the matching Active Harmonic Filter AHF model for your site. Typical response time is within 24 working hours.