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1.5 FOUR QUADRANT REPRESENTATION
The angle(Ø) between voltage and current provides us information about the direction of energy flow. A positive
sign for active/reactive power indicates that active/reactive power is consumed. And also a negative sign for active/
reactive power indicates that active/reactive power is generated.
NOTE:
If the signs of active and reactive power are examined, it can be defined the quadrant that MMW03-M22CH
measures.
In order to understand P and Q signs in MMW03-M22CH 110P and Ecras, instantaneous displays for P and Q
must be checked.
If active power display is seem constantly, it means active power(P) is positive. If it is blinked, it means active
power(P) is negative.
If reactive power(Q) display is seem constantly, it means reactive power(Q) is positive. If it is blinked, it means
reactive power(Q) is negative.
NOTE:
Signs of P and Q can be reached through modbus communication.
E.g.;
P= +10kW, Q= +5kVAr => Quadrant-1
P= -10kW, Q= +5kVAr => Quadrant-2
P= -10kW, Q= -5kVAr
P= +10kW, Q= -5kVAr
Figura 1.2: Four Quadrant Representation
=> Quadrant-3
=> Quadrant-4
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