PFR690 Phase rotation relay

  • Phase control unit PFR 690 for analysis of correct phase rotation
  • Destructions or damages caused  by false direction of rotation are prevented effectively.
  • The PFR690 unit evaluates correct  phase rotation and phase loss.  The unit consists of a changer  whose contact closes at clockwise 3 phase-rotation 
  • The PFR690 unit is powered directly out of three phases
  • Description
  • Ordering information
  • Input data
  • Output data
  • General data

    If there is a need for correct 3 phase-rotation in installations and circuitry the PFR690 eliminates malfunctions. This is extremely important when activating motor equipment. False phase rotation could cause serious damages or even destruction of the equipment.


    The PFR690 unit is connected paralell to the electric consumer and evaluates 3 phase rotation. When using clockwise 3 phase rotation (L1-L2-L3) the relay operates and closes contacts 11 and 14. If there is a wrong phase rotation the relay will not switch. To assure precise functionality engage all phases simultaniously. The BONTRONIC control unit is used also as phase loss monitor. The energetic recovery reaction has to be proved in a field test. It is advisable to install the PFR690 unit before the electrical contacts of the motor protection. During clockwise phase rotation the unit operates and switches the working contact of the electric contactor coil.

    Case colour grey  
    Technical specifications PFR690
    Ord. No 909214
    Input voltage (3 phases) 690 V ± 10%, 50-60 Hz
    Current demand 4mA max. per Phase
    Power consumption 4VA max.
    3 Phase rotaion L1 – L2 – L3
    Contact loadings 1 changer
    Switching voltage 250V AC
    Constant current 5A
    Starting current 8A
    Switching power AC max. 1200 VA (Resistive load)
    Switching power DC max. 120 W ( Resistive load)
    Isolation voltage coil / contact 4 kV eff.
    Operating temperature 0°C to +40°C
    Storage temperature  – 20°C to +80°C
    Degree of protection IP 20
    Wire alignment AWG 12
    Dimensions 85 x 58 x 35 mm


    Monitoring / Supply