Siemens siprotec 7SA522 - Page 422

Control During Operation
7-14 7SA522 Manual
C53000-G1176-C119-2
From the
Device Front
With a device ready for operation, first press the key. The 0$,10(18 appears.
Use the key to select the menu item 0HDVXUHPHQW, and switch to the list of meas-
ured values using the key. The 0($685(0(17 selection appears. See figure 7-16.
.
Figure 7-16 Selection of measured values on the front — example
The measured values are divided into the following groups:
01 2SHUDWLRQSUL Operating measured values, primary.
03 ,PSHGDQFH3ULP Primary operating impedance.
11 2SHUDWLRQVHF Operating measured values, secondary.
13 ,PSHGDQFH6HF Secondary operating impedance;
Table 7-1 Operational measured values
Measured values
primary secondary % referred to
I
L1
, I
L2
, I
L3
phase currents A A rated operational current
1
)
3I
0
earth currents A A rated operational current
1
)
I
1
, I
2
pos. and neg. seq. currents A A rated operational current
1
)
3I0
sen
sensitive earth current A mA rated operational current
1
)
3
)
I
Y
, I
P
transformer star point current or
earth current in the parallel line
A A rated operational current
1
)
3
)
U
L1–L2
, U
L2–L3
, U
L3–L1
line voltages kV V rated operational voltage
2
)
U
L1–E
, U
L2–E
, U
L3–E
phase-earth voltages kV V rated operational voltage /√3
2
)
3U
0
displacement voltage kV V rated operational voltage ·√3
2
)
4
)
U
X
voltage at the measuring input U
4
kV V rated operational voltage /√3
2
)
U
1
, U
2
pos. and neg. seq. voltages kV V rated operational voltage /√3
2
)
R, X operational resistance, reactance ΩΩ —
S, P, Q apparent, real, and reactive power MVA, MW,
MVAR
—
√3·U
N
·I
N
rated operational values
1
)
2
)
cos
ϕ power factor (abs) (abs) —
f frequency Hz Hz rated frequency
1
) acc. to address  (refer to Sub-section 6.1.3)
2
) acc. to address (refer to Sub-section 6.1.3)
3
) with consideration of the factor  ,,SK&7 (refer to Sub-section 6.1.1)
4
) with consideration of the factor  8SK8GHOWD (refer to Sub-section 6.1.1)
MENU
Etc.
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