Dynamic power factor correction
for use in networks with harmonic loads
Special advantages
- Improved voltage quality, i.e. avoidance of high inrush currents of the power capacitors
- Extend the service life of BLK systems several times over
- Safety of the overall system is significantly increased (i.e. avoidance of damage caused by defective contactors and subsequently exploding capacitors)
- Ultra-fast regulation of the power factor, resulting in a consistent reduction in reactive current costs and kWh losses
- Voltage stabilization (e.g. grid support during the start-up phase of large motors)
- Improved utilization of power distribution (transformers, cables, switchgear, etc.) by eliminating power peaks
- Reduction of process times (e.g. welding)
Optimized, thermal design
The enclosures are forcibly ventilated by a raised roof and a filter fan in the lower section. Particularly large systems also have a roof ventilator. The main heat source, the throttle, is positioned precisely in the air flow.
Low losses (PV)
Janitza’s power capacitors have dielectric losses of just 0.2 W/kvar. The total power loss is 0.5 W/kvar.
Choked version
Harmonic currents or voltages can overload the compensation system and, in the worst case, feed unacceptably high harmonics into the grid. Choked power capacitors avoid this, as they prevent resonances and have a certain suction effect.
Minimized grid perturbations
Unlike contactor-controlled systems, systems for dynamic power factor correction switch at zero crossing. This minimizes the grid feedback. Dynamic PFCs use power semiconductors to switch the capacitors.
Typical applications
- Use in applications with fast and high load changes
- Automatically controlled central compensation in the NSHV
- For use in networks with harmonic loads
- Power converter power (non-linear loads) >15 % of the connected load
- Total harmonic distortion of THD-U > 3 %
- Harmonic filtering and improvement of voltage quality
- Reduction of reactive current costs
- Stabilization of the mains voltage
Areas of application
- Automotive industry (welding systems, presses, …)
- Lifts and cranes
- Start-up compensation for large motors
- Drilling rigs in oil production
- Wind turbines
- Welding technology
- Steel production
- Plastic spraying systems
- Fishing vessels
7 % choked, dynamic power factor correction in plug-in technology ES8206 FKTh
- Dynamic (t < 20 ms), choked PFC control system with slide-in technology in a steel cabinet
- In a bayed cabinet for free-standing installation (the capacity can be extended as required)
- Rated voltage: 400 V, 3-phase, 50 HZ
- Choking: 7 % (189 Hz series resonance frequency)
- Protection class: IP32
- Ventilation: from 120 kvar with fan in the enclosure door for forced ventilation
- With reactive power controller Prophi® 6T / 12T
14 % choked, dynamic power factor correction in plug-in technology ES8206 Th
- Dynamic (t < 20 ms), choked PFC control system with slide-in technology in a steel cabinet
- In a bayed cabinet for free-standing installation (the capacity can be extended as required)
- Rated voltage: 400 V, 3-phase, 50 Hz
- Choking: 14 % (134 Hz series resonance frequency)
- Protection class: IP32
- Ventilation: from 120 kvar with fan in the enclosure door for forced ventilation
- With reactive power controller Prophi® 6T / 12T
Choked, dynamic capacitor modules in plug-in technology
- Dynamic (t < 20 ms), choked PFC control system with slide-in technology in a steel cabinet
- For mounting in existing switch cabinets
- Rated voltage: 400 V, 3-phase, 50 Hz
- Choking:7 % (189 Hz filter design), 14 % (134 Hz series resonance frequency)
- Protection class: IP32
- Ventilation: natural convection, ensure sufficient ventilation!
- With discharge resistors