Wall Mount – Active Harmonic Filter

ESP-34W APF Key Features

  • High Density and Scalable System Architecture
  • Universal Voltage: 400V or 480V or 208V (with transformer)
  • Harmonic compensation for 3-wire or 4-wire system selectable

Powerful Performance

  • Eliminates harmonics current from 2nd to 51st order
  • Close / Open Loop Selectable Control
  • Ultra-fast response to load changes within 1 microsecond
  • Load balancing between phases and unload neutral wire
  • Programmable Harmonics Compensation and Power Factor Correction

Expandable Capabilities

  • Easy upgradable without extra accessories
  • Same or Different rated current filter system can be wired in Parallel with common coupling CT Intuitive Human Machine Interface
  • HMI utilizing 7inch Coloured LCD Touch Screen for advanced control and monitoring
  • Clear menu structure and display data in both tables and diagrams
  • Export and archive event logs to SD memory card
  • Intuitive operation and password protection
  • Waveforms are displayed side by side making it easy to compare and identify sinusoidal current and output current of the active filter

Operating Principle

Enersine™ APF measures and monitors the entire load current through external auxiliary coupling current sensing transformers (CT) mounted on the AC line, removes the fundamental frequency component and injects opposite phase harmonic current to cancel harmonic current in the electrical distribution system.

Operating Principle - Active Harmonic Filter

Specifications Table

MODEL ESP34W-35 ESP34W-60 ESP34W-90
Maximum Compensating Current Per Phase* 35ARMS (per power module) 60ARMS (per power module) 90ARMS (per power module)
Maximum Neutral Compensating Current 3 times of Phase Current (400V version only)
Maximum Scalable Current Per Phase 35ARMS 240ARMS 360ARMS
Voltage Tolerance 400V or 440V +15% / -20% , 480V +10% / -20% (208V and other Voltages available with transformer)
Phase/Wires 3 phase 3 wires or 4wires selectable for 400V version. 3phase 3 wires only for 440V and 480V version
Nominal Frequency 50/60Hz ± 5% (Auto Sensing)
Compensated Harmonic Orders Global Mode: From 2nd to 51st order, including Even orders Selective Mode : Up to 30 orders simultaneously
Power Factor Correction (Reactive Current) Power factor correction is programmable from 0.6 lagging to 0.6 leading
Load Balancing Both phase to phase and phase to neutral
Programmable Filtering Mode 1.     Harmonic compensation only.
2.     Power Factor (Reactive Current) compensation only
3.     Harmonic compensation priority + Power Factor compensation
4.     Power Factor compensation priority + Harmonic compensation
5.     Harmonic compensation priority + Power Factor compensation + Load Balancing
CT Ratio Programmable Primary Current: 100A~10000A   Programmable Secondary Current: 1A/5A
CT Location Programmable: Source Side: Close Loop Control or Load Side: Open Loop Control
Response Time Harmonic Compensation <1ms  , Reactive Current Injection <20ms
Inrush Current Less than rated current
Current Limitation Yes, at full correcting
Maximum Heat losses ≤5% at full capacity
Compensation Ratio 10:1 typical
Power Electronics 3-Level IGBT Technology with DSP control
Cooling Forced air cooling with speed-controlled fans
Noise Level < 60 dBA
Interfaces Ethernet (TCP/IP), RS-485 (Modbus RTU Protocol), USB, 3x Output Dry Contact and 1x Input Dry Contact, 1x EPO
Environment Indoor installation in clean environment up to 1000m altitude (higher altitudes with suitable derating).
Operationg Ambient Temperature 0˚C to 40˚C (Up to 50˚C with suitable derating)
EMC Class Compliance EN 61000-6, EN 55011, Class A1, IEC 61000-3, EN 61000-4
Safety & Design Standard Complies to EN 50178, EN 60146
Power Module Dimension (WxDxH) 500 x 286 x 775 mm (with HMI and built-in controller)
Protection Index IP31, other IP options available upon request

Related Products