Tariff Control - Landis+Gyr ZMQ202 User Manual

Allocation to the four
quadrants
2.5

Tariff Control

H 71 0200 0215 f en - ZMQ202 / ZFQ202 - User Manual
Description of Unit
Based on the signs of A and R the microprocessor can allocate the reactive
energy to the four quadrants.
• Reactive energy in quadrant I: +Ri
• Reactive energy in quadrant II: +Rc
• Reactive energy in quadrant III: –Ri
• Reactive energy in quadrant IV: –Rc
Export active power
Import
reactive
sin ϕ = 0,5 (150°)
power
+
-Ac
-Ai
_
Export
reactive
power
Various signal sources can be used to select the required tariff. Tariff
control may be performed:
• Externally by the three input control signals E1, E2, E3 (with selectable
control voltage ranges: 24 V up to 230 V; the control voltage must be
specified by the customer)
• Internally by the calendar clock and the time switch
• By event signals based on threshold values of the monitoring functions,
e.g. frequency, voltage
Signals from the various signal sources can be combined to realise a
sophisticated tariff structure.
Import active power
_
+
sin ϕ =1 (90°)
cos ϕ = 0,5 (60°)
+Rc +Ri
II I
Lagging
Leading
Q
+Ai
+Ac
Lagging Leading
III IV
-Ri -Rc
-90°
sin ϕ = 0,5 (30°)
S U
ϕ
cos ϕ 1(0°
= )
I
P
cos ϕ = 0,5 (- 60°)
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