Phase control unit PFW2 for analysis of correct phase rotation
Destructions or damages caused by false direction of rotation are prevented effectively.
The PFW2 unit evaluates correct phase rotation and phase loss. The unit consists of a changer whose contact close at clockwise 3 phase-rotation.
The PFW2 unit is powered derectly out of three phases..
If there is a need for correct 3-phase rotation in installions and circuitry the PFW2 eliminates malfunctions. This is extremely important when activating motor equipment. False phase rotation could cause serious damages or even destruction of the equipment.
The PFW2 unit is connected parallel 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 aasure 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 PFW2 unit before the electrical contacts of the motor protection.During clockwise phase rotation the unit operates and switches the working contact of the elctric contactor coil.
|Casde colour grey|
|Input voltage (3 phases)||200 V to 690 V ± 10%, 50-60 Hz|
|Current demand||4mA max. per Phase|
|Power consumption||4VA max.|
|3 Phase rotation||L1 – L2 – L3|
|Contact loadings||1 changer|
|Switching voltage||250V AC|
|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|