Functions
2.44 Threshold supervision
SIPROTEC, 7UM62, Manual
C53000-G1176-C149-7, Release date 03.2010
303
UL3E
(phase-earth volt-
age)
U
L3prim
/(U
N,G,M
/√3) · 100 %
(normalized via addr. 251/√3)
The voltage connected to the U
L3
input is processed directly, and
converted into the primary phase-earth voltage. The calculation is
performed once per cycle.
Note: The 100% value refers to the phase-earth voltage of the pro-
tected object.
UE
(voltage at the U
E
input)
U
Eprim
/(U
N,G,M
/√3) · 100 %
(normalized via addr. 251/√3)
The voltage connected to the U
E
input is converted into a primary
voltage via FACTOR UE (addr. 224). The calculation is performed
once per cycle. Observe the applications as per Table 2-2.
Note: The 100% value refers to the phase-earth voltage of the pro-
tected object.
U0
(Zero system volt-
age)
U0
prim
/(U
N,G,M
/√3) · 100 %
(normalized via addr. 251/√3)
The zero system voltage is determined from the phase-to-earth
voltages on the basis of the definition equation for symmetrical
components, and converted into primary values. The calculation is
performed once per cycle.
Note: The 100% value refers to the phase-earth voltage of the pro-
tected object.
U1
(positive-se-
quence
voltage)
U1
prim
/(U
N,G,M
/√3) · 100 %
(normalized via addr. 251/√3)
The positivev sequence voltage is determined from the phase-to-
earth voltages on the basis of the definition equation for symmet-
rical components, and converted into primary values. The calcula-
tion is performed once per cycle.
Note: The 100% value refers to the phase-earth voltage of the pro-
tected object.
U2
(Negative se-
quence voltage)
U2
prim
/(U
N,G,M
/√3) · 100 %
(normalized via addr. 251/√3)
The negative sequence voltage is determined from the phase-to-
earth voltages on the basis of the definition equation for symmet-
rical components, and converted into primary values. The calcula-
tion is performed once per cycle.
Note: The 100% value refers to the phase-earth voltage of the pro-
tected object.
UE3h
(3. harmonic
voltage at the U
E
input)
U
E3hprim
/(U
N,G,M
/√3) · 100 %
(normalized via addr. 251/√3)
From the voltage connected to the U
E
input, the 3rd harmonic
voltage is computed and converted into a primary voltage via
FACTOR UE (addr. 224). The calculation is performed once per
cycle. Observe the applications as per Table 2-2.
Note: The 100% value refers to the phase-earth voltage of the pro-
tected object.
3I0
(zero-sequence
current system
side 2)
3I0
prim
/(S
N,G,M
/(√3 · U
N,G,M
)) · 100 %
(normalized with addr. 251 and
252)
The zero sequence current is determined from the phase currents
on the basis of the definition equation for symmetrical compo-
nents. The calculation is performed once per cycle.
Note: The 100% value refers to the nominal current of the protect-
ed object.
I1
(positive se-
quence
current system
side 2)
I1
prim
/(S
N,G,M
/(√3 · U
N,G,M
)) · 100 %
(normalized with addr. 251 and
252)
The positive sequence current is determined from the phase cur-
rents on the basis of the definition equation for symmetrical com-
ponents, and converted into primary values. The calculation is per-
formed once per cycle.
Note: The 100% value refers to the nominal current of the protect-
ed object.
I2
(Negative se-
quence current
system side 2)
I2
prim
/(S
N,G,M
/(√3 · U
N,G,M
)) · 100 %
(normalized with addr. 251 and
252)
The negative sequence current is determined from the phase cur-
rents on the basis of the definition equation for symmetrical com-
ponents, and converted into primary values. The calculation is per-
formed once per cycle.
Note: The 100% value refers to the nominal current of the protect-
ed object.
IEE1
(Sensitive earth
current)
I
EE1
/0.5 A · 100 % The fundamental frequency component is determined from the
current connected to the I
EE1
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.
Measured Value Scaling Explanation
To Next Page
Loading...
Need help?
General
