ESP-34W APF Wall Mount – Active Harmonic Filter

35A -100A RMS Output Current Rating Per Module

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

Like all Enersine APF Series, the compensation power electronics are packed in compact enclosed modules with forced air cooling designed for wall-mount installations where space is at a premium and harmonic mitigation current is high.

These ESP-34W power modules (PM) each 35ARMS, 60ARMS, 80ARMS, 90ARMS, 100ARMS rated and extendable, can be easily installed in small and confined areas, as well as the required “out of reach” locations. Each power module is fully HMI integrated with a built-in controller capable of compensating harmonics and phase displacements independently. Remote monitoring using building management system (BMS) via Modbus over RS485 RTU or Ethernet interface is available. Commissioning and maintenance can be easily performed with a laptop and Ethernet port.

High-density design allows these modules to be connected in parallel to achieve higher compensation power. This is particularly useful when considering future expansion or changes to the electrical networks which increases harmonic levels and requiring greater harmonic mitigation current.

 Key Features

  • High Density and Scalable System Architecture
  • Universal Voltage: 208V/400V/480V (without transformer)
  • IP31, other IP options available upon request
  • Harmonic compensation for 3-wire or 4-wire system selectable
  • Close/Open Loop Selectable Control
  • Ultra-fast response to load changes within 1 microsecond
  • Same or different rated current filter system can wired in parallel with common coupling CT
  • Suitable with 1 Amp or 5 Amps CT Secondary Current
  • 7inch Touch screen HMI provides power parameters and display data in tables and waveforms.

Programmable Filtering Mode Options

  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

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
  • Reduce voltage drop and temperature rise on transformers & Cables

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

 

Specifications Table

ModelESP34W-35ESP34W-60ESP34W-80ESP34W-90ESP34W-100
Maximum Compensating Current Per Phase35ARMS
(per power module)
60ARMS
(per power module)
80ARMS
(per power module)
90ARMS
(per power module)
100ARMS
(per power module)
Maximum Neutral Compensating Current3 times of Phase Current (400V version only)
Maximum Scalable Current Per Phase35ARMS480ARMS640ARMS720ARMS800ARMS
Input Voltage Range(i) 400V +15%, -20%,
(ii) 480V +10%, -20%
(i) 208V +15%, -20%; (ii) 400V +15%, -20%
(iii) 440V +15%, -20%; (iv) 480V +10%, -20%
Phases/Wires3 phase 3 wires or 4 wires selectable for 208V and 400V model 3 phase 3 wires only for 440V and 480V model
Nominal Frequency50/60Hz ± 5% (Auto Sensing)
Compensated Harmonic OrdersGlobal 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 BalancingBoth phase to phase and phase to neutral
Programmable Filtering Mode1. 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 RatioProgrammable Primary Current: 100A~10000A Programmable Secondary Current: 1A/5A
CT LocationCT at Source Side: Closed Loop Control CT at Load Side: Open Loop Control
Response TimeHarmonic Compensation <1ms, Reactive Current Injection <20ms
Inrush CurrentLess than rated current
Current LimitationYes, at full correcting
Maximum Heat Losses≤5% at full capacity
Compensation Ratio10:1 typical
Power Electronics3-Level IGBT Technology with DSP control
CoolingForced air cooling with speed-controlled fans
Display7inch Colorful LCD Touch Screen
InterfaceUSB, Ethernet (TCP/IP), RS-485 (Modbus RTU Protocol), EPO, 3x Output Dry Contact and 1x Input Dry Contact
TypeWall Mount
Power Module Dimension (WxDxH, mm)500 x 300 x 800mm (with HMI and built-in controller)500 x 286 x 775mm
(with HMI and built-in controller)
Weight (kg)4751585960
Protection IndexIP31, other IP options available upon request
Noise Level< 65 dBA
EnvironmentIndoor installation in clean environment up to 1000m altitude (higher altitudes with suitable derating)
Operating Temperature0°C to 40°C (up to 50°C with suitable derating)
Safety StandardEN50178
EMC ComplianceEN 55011 Class A1, EN 61000-3, EN 61000-4, EN 61000-6
Reference Design StandardEN60146
* the current rating may be derated automatically depending on load conditions for ambient temperature higher than 40 degree C.

Series Table

Model NumberMax Compensating
Current Per Phase
Max Scalable
Current Per Phase
Input Voltage Range
ESP34W-3535ARMS35ARMS(i) 400V +15%, -20%,
(ii) 480V +10%, -20%
ESP34W-6060ARMS480ARMS(i) 208V +15%, -20%;
(ii) 400V +15%, -20%;
(iii) 440V +15%, -20%;
(iv) 480V +10%, -20%
ESP34W-8080ARMS640ARMS(i) 208V +15%, -20%;
(ii) 400V +15%, -20%;
(iii) 440V +15%, -20%;
(iv) 480V +10%, -20%
ESP34W-9090ARMS720ARMS(i) 208V +15%, -20%;
(ii) 400V +15%, -20%;
(iii) 440V +15%, -20%;
(iv) 480V +10%, -20%
ESP34W-100100ARMS800ARMS(i) 208V +15%, -20%;
(ii) 400V +15%, -20%;
(iii) 440V +15%, -20%;
(iv) 480V +10%, -20%

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