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= Key1
= Key 2
= Key 3
= Max. value or consumption = Min. value or supply
Example: Sum real power
The sum real power must be given out via analogue
output of UMG 505. As sometimes a generator is
connected, also that power shall be transmitted,
which is delivered to the energy supplier. Real po-
wer supply is marked be a „-“ before the measured
value.
The following settings are required:
Output range
= 0 .. 20mA
Measured value
= Sum real power
Scale start value
= -100kW (supply)
Scale end value
= 400kW (consumption)
With the selected settings, a range of 100kW +
400kW = 500kW is covered. Therefore: 500kW =
20mA.
1mA means 500kW/20 = 25kW.
If no real power is consumed or supplied, a current
of 4mA flows.
If real power is supplied, the current is smaller but
4mA.
Example: cos(phi)
Output range
= 4 .. 20mA
Scale start value
= 0.700inductive
Scale end value
= 0.900capacitive
The scale range of 0.400 is divided into 16mA,
cos(phi)=1 lies at 16mA.
0mA
4mA
20mA
10mA
0,700ind.
0,900cap.
1,000
16mA
0mA
4mA
20mA
10mA
-100kW
400kW
0kW
15mA
300kW
150kW
Consumption
Supply