EPCOS active harmonic filters and power optimizers help to eliminate harmonic pollution from the grid, reduce power quality problems and use energy more efficiently and reliably.
The PQSine S series is an active harmonic filter system designed to eliminate harmonic oscillations and consequently reduce costs. PQSine S series monitors the current signal and compensates the unwanted elements of the measured current. Thus, the filter ensures harmonic suppression independently of the number of loads. It also corrects the power factor, improving the system efficiency while reducing harmonic pollution.
PQSine at a glance:
Harmonic compensation up to 50th harmonic
Ultra-fast reactive power compensation (inductive and capacitive)
Load balancing between phases and unloaded neutral wire
Modular system extendable from 25 A to 600 A
Grid resonance detection
Advanced digital control algorithm
Ethernet and MODBUS inferace
User-friendly menu operation
High performance and reliability
Fast current harmonics and reactive power suppression e.g. for:
Green power generation (e.g. photovoltaics and wind turbines)
-10 to +40 °C without derating. Solutions for higher ambient temperatures on request
5 to 95%, non-condensation
75, 151, 300, 405 L/sec (25-35, 50-60, 75-100, 150 A)
IP 20 , (opt. IP30, IP31, IP42, IP 54) according to IEC 529 (customizable)
RAL7035 light grey
1500; 1% up 1500 m. Between 1500 m to 4000 m, according to GB/T3859.2, the power decreases by 1% for every additional 100 m
CE, IEEE 61000
CE, ETL (UL 508 and CSA C22.2 # 2014), IEEE 61000
Compliance with standards
IEEE 519, ER G5/4
*) For typical harmonic order distortions
Advantages of AHF PQSine S series three-level NPC topology
The AHF PQSine S Series range operates on the basis of a three-level Neutral-Point-Clamped (NPC) topology circuit. As can be seen from the diagrams below, the conventional two-level circuit configuration consists of 6 IGBTs (two IGBT power devices in each phase leg and current path). In case of a three-level topology, the circuit configuration consists of 12 IGBTs (four IGBT power devices in each phase leg and current path).
The three-level NPC circuit can produce three voltage levels at the output: the DC bus plus voltage, zero voltage and DC bus negative voltage. The two-level topology can only connect the output to either the plus bus or the negative bus. It also ensures higher quality and better harmonics of the line-to- line output voltage, thus reducing the output filter requirement and the associated costs.
Main advantages of the three-level NPC topology are:
Lower losses: only half of the voltage has to be switched, thus reducing the switching losses in the transistor. Three-level solutions are characterized by reduced circuit losses and higher efficiency, thus supporting energy-saving concepts.
Smaller output current ripple: the NPC three-level topology has a lower ripple in the output current and half of the output voltage transient thanks to a higher quality output voltage. This improves performance and reduces the internal filter requirement.
Product Brief: PQSine S Series of Active Harmonic Filters and Power Optimizers