State the purpose of four quadrant meter.

State the purpose of four quadrant meter.
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1 Answer

Answer :

Purpose of four quadrant meter: 

Four-quadrant meter is basically a bidirectional energy-meter with additional measurement facility. The purposes of four-quadrant meter are:

1) Measurement of energy/power under following conditions:


Quadrant I: Import of active power and Import of lagging reactive power.

 Both active & lagging reactive powers flow positively.

 Both are delivered to the consumer load.


Quadrant II: Export of active power and Import of lagging reactive power.

 The active power flow negatively & lagging reactive power flows positively. The active power is delivered to supply system.

 The lagging reactive power is delivered to load.


Quadrant III: Export of active power and Export of lagging reactive power.

 Both active & lagging reactive powers flow negatively.

 Both active & lagging reactive powers are delivered to supply system.


Quadrant IV: Import of active power and Export of lagging reactive power.

 The active power flows positively & lagging reactive powers flow negatively.

 The active power is delivered to load & lagging reactive power is delivered to supply system.


2) Measurement of Maximum demand (MD) for each type of power i.e kW, kVA and kVARh


3) Time-of-use metering:

Bidirectional consumption and demand.


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