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POWER FACTOR CONTROLLERS

PFR-X **R / PFR-M **T
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BECAUSE EXCELLENT CAPACITORS ARE NOT ENOUGH

The plug’n’play power factor controllers of our PFR-series calcu-
late the active and reactive power in the mains from the
measured current and voltage. Their intelligent control algo-
rithm optimizes the switching sequences and guarantees for
short regulation times with a minimum number of switchings. At
the same time, equal distribution of switchings for capacitors of
equal size extends the lifetime of the capacitors. The integrated
connection control immediately detects in which phases voltage
and current are measured, and adapts the entire system auto-
matically. The very low current threshold of 15 mA allows for
very reliable and exact PF control. 1 A as well as 5 A current
transformers can be used without additional manual adjust-
ments. The power supply of PFR-X covers a voltage range of
90...550 V, the PFR-M supply is rated for a voltage range of 207-
253 V; it can easily be modified to 100-132 V by a jumper setting.
POWER FACTOR CONTROLLERS control parameters is possible at any time, even during operation of the equipment.
The rated mains voltage is the only value to be entered before commencing operation. The controller blocks operation to protect the
capacitors if the tolerances of this voltage setting are exceeded during operation. All other relevant parameters have been preset by
the manufacturer for immediate start of operation in nearly any common configuration. Individual adjustment and optimization of the

Once connected, the size of capacitors or reactors is detected automatically. The life cycle of capacitors is monitored via the degradati-
on of capacitance, and a pre-failure alarm can be provided.

The controllers will operate correctly even if the value of the current transformer ratio has not been entered. Please note that in
case of the PRF-X, all display functions related to current measurements will be disabled.

PFR-M can monitor the temperature inside the capacitor cabinet by means of an integrated sensor. For PFR-X, the sensor comes as
an optional part which can simply be plugged onto the back of the case. It can activate a fan connected to one of the output relays
(PFR-X)/the digital output (PFR-M), or switch off the capacitors if required. External thermostats may be connected in parallel to the
integrated temperature sensor (PFR-X)/to the digital input (PFR-M) for monitoring of the temperature in other related cabinets.

For maintenance purposes, all branches can be switched manually.

Display
The backlit LC-Display delivers information about the equipment itself and about the mains conditions. It is also necessary
for the controller setup.

Reported mains conditions
PFR-X: Voltage, THD U, current, active power, reactive power, apparent power, frequency, ∆Q (power to be compensated) ,
detailed voltage harmonics 3...19, cosφ
PFR-M: Voltage, THD U, current, THD I, active power, reactive power, apparent power, frequency, ∆Q (power to be compensated),
detailed voltage and current harmonics 3...30, cosφ, counters

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