Standard Capacitors

An Active Harmonic Filter (AHF) is an advanced power electronic device used to improve power quality in electrical systems by eliminating harmonics, correcting power factor, and balancing load currents in real time.

The AHF continuously monitors the load current, detects harmonic distortion, and injects compensating current of equal magnitude but opposite phase to cancel out the harmonics caused by non-linear loads such as variable frequency drives (VFDs), UPS systems, computers, and LED lighting.

Key Features:

• Real-time harmonic detection and compensation (up to the 50th harmonic)

• Power factor correction and load balancing

• Modular and compact design for ease of installation

• LCD / HMI interface with monitoring and control functions

• Communication options: Modbus RTU / TCP, RS-485, Ethernet

• Automatic protection against over-voltage, over-current, and thermal overload

Benefits:

• Improved system efficiency and reliability

• Compliance with IEEE-519 / IEC-61000-3 standards

• Reduced heating and losses in transformers, cables, and equipment

• Extended equipment life and improved voltage stability

Available Ratings (Typical):

• Voltage: 400V / 415V, 3-Phase, 3- or 4-Wire

• Current Rating: 30A to 600A (modular/scalable)

• Response Time: < 1 millisecond

• Efficiency: > 97%

A compact, fast-response Static Var Generator (SVG) for three-phase four-wire systems that provides dynamic reactive power compensation, harmonic mitigation and neutral-load balancing to improve power quality and maximize system efficiency.

Detailed description & specifications: 

Product name: PQVar™ I Series — SVG (3P4W)
Type: Static Var Generator — 3-Phase, 4-Wire (Three-phase with neutral)
Application: Industrial & commercial power distribution, sensitive processes, data centers, hospitals, laboratories, and utilities where voltage stability, harmonic control and neutral current mitigation are required.

Key Functions

• Dynamic reactive power compensation (leading/lagging) for precise power factor control.

• Active harmonic mitigation — cancels load-generated harmonics in real time, improving overall THD.

• Neutral current compensation & load balancing for unbalanced and nonlinear loads (3P4W systems).

• Fast response time (milliseconds) to transient reactive/load changes.

• Continuous monitoring & logging of voltage, current, power factor, harmonics and energy parameters.

Features

• Modular, rack or wall-mount design with small footprint.

• High switching frequency IGBT/SiC based converters for low losses and high efficiency.

• Built-in HMI (LCD) with graphical display for real-time status, event log and simple commissioning.

• Communication: Modbus RTU/TCP, optional Profibus/Profinet/Ethernet/IP.

• Auto-reconnect and self-diagnostics with fault reporting.

• Safety & protection: over-voltage, over-current, short-circuit, thermal protection and earth leakage detection.

• Adaptive control algorithms for operation under distorted or unbalanced supply conditions.

• On-site selectable modes: PF setpoint, kvar control, voltage support, harmonic suppression priority.

Typical Technical Specifications (configurable)

• Rated System Voltage: 400 / 415 V AC ±10% (3P + N)

• Frequency: 50 / 60 Hz (selectable)

• Rating (example ranges): 30 kVAr — 600 kVAr (modular scalable)

• Response Time: < 1 ms to 5 ms (depending on model & setting)

• THD Compensation: up to 50th harmonic (typical)

• Operating Temperature: -10 °C to +50 °C

• Enclosure Protection: IP20 (standard) — IP54 / IP65 options available

• Cooling: Forced air cooling with temperature-controlled fans

• Efficiency: > 97% (typical)

• Communication Ports: RS-485 (Modbus RTU), Ethernet (Modbus TCP) optional fieldbus gateway

• Mounting: Floor / Wall / Panel mount options

Benefits

• Improved power factor and reduced utility penalties.

• Reduced transformer & cable heating, prolonged equipment life.

• Lower energy losses and improved system capacity.

• Eliminates neutral overcurrents and associated overheating risks.

• Ensures compliance with IEEE-519 / IEC harmonic limits.

Accessories & Optional Items

• Remote HMI / SCADA integration kit.

• External harmonic measurement & reporting module.

• Outdoor/IP rated enclosure with heater.

• Spare power modules and bypass switchgear.