Siemens SIMEAS Q80 Operating Instruction page 125

11.1 Basics
11.1.1 Preface
The first step will be to introduce basic ideas from the SIMEAS Q80 7KG8080 measurement philosophy which are the
basis for using the device correctly. This knowledge is crucial, since already when you set up a measurement, it's
necessary to know what settings influence your results, and which ones don't.
11.1.2 Measurement types
11.1.2.1 Connected channels and power measurement
Three modes for power measurement are available:
· 1 phase power measurement
· 2 phase power measurement
· 3 phase power measurement
11.1.2.2 Explanation of symbols
11.1.2.2.1 Device terminals
SIMEAS Q80 7KG8080
U1 = Voltage measurement input 1
(also channel designation in the display)
U2 = Voltage measurement input 2
U3 = Voltage measurement input 3
U4 = Voltage measurement input 4
SIMEAS Q80 7KG8080 - 1
U1 = Voltage measurement input 1
(also channel designation in the display)
U2 = Voltage measurement input 2
U3 = Voltage measurement input 3
U4 = Voltage measurement input 4
11.1.2.2.2 Designations of the voltages in the three-phase network
U = Voltage of Line 1 to Ground
L1
U = Voltage of Line 2 to Ground
L2
U = Voltage of Line 3 to Ground
L3
N = Neutral line potential
I1 = Current measurement input 1
(also channel designation in the display)
I2 = Current measurement input 2
I3 = Current measurement input 3
I4 = Current measurement input 4
U5 = Voltage measurement input 5
U6 = Voltage measurement input 6
U7 = Voltage measurement input 7
U8 = Voltage measurement input 8
I = Current in Line 1
L1
I = Current in Line 2
L2
I = Current in Line 3
L3
I = Current in neutral line
N
Power Quality Recorder SIMEAS Q80 7KG8080, Operating instruction
E50417-B1074-C419-A2, Release 09.02.2011
Computations E-49