Functions
2.44 Threshold supervision
SIPROTEC, 7UM62, Manual
C53000-G1176-C149-7, Release date 03.2010
304
IEE2
(Sensitive earth
current)
I
EE2
/0.5 A · 100 % The fundamental frequency component is determined from the
current connected to the I
EE2
input. The calculation is performed
once per cycle.
Note: Unlike the scaling of the operational measured values,
scaling is not to primary values
. The 100 % value results with a
secondary infeed current of 0.5 A.
ϕ
(Power angle)
ϕ/180° · 100 % The power angle is calculated from the positive sequence voltage
and the positive sequence current. The following definition ap-
plies: ϕ = ϕU – ϕI (A positive angle will appear if the current lags
behind the voltage).
cos PHI cos ϕ · 100 % The power factor is calculated from the power angle. Positive
values result for the angle range between (–90° and +90°).
Measuring
Transducer1
(Voltage or
current at measur-
ing transducer
TD1)
U/10 V · 100 %
or
I/20 mA · 100 %
The DC quantity is calculated from the measured quantity present
at TD1. Depending on the connection, the results can be positive
or negative. Depending on the jumper setting, a voltage or a
current is calculated.
Note: The 100% value refers to an input voltage of 10 V or an input
current of 20 mA.
Measured Value Scaling Explanation
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