Siemens SIPROTEC 7UM62 Manual page 335

Measured second-
Values ary
U /I U in V- no primary values
DC DC DC
(measur-
ing trans-
ducer 1)
in mA-
I
DC
U (mea- U no primary value
exc exc
suring
transducer
3)
With the following parameters from the Power System Data 1:
Parameter
Unom PRIMARY
Unom SECONDARY
IN-PRI I-SIDE1
IN-SEC I-SIDE1
IN-PRI I-SIDE2
IN-SEC I-SIDE2
UN-PRI SIDE 1
In addition measured values are computed by the protection functions and made available:
Measured Values of Rotor Earth Fault Protection (Rn, fn)
The following secondary values are available: System-frequency displacement voltage U
current II (= I
RE
of the total resistance of the rotor earth fault protection.
ϕZ
tot
Measured Values of the Rotor Earth Fault Protection (1–3 Hz)
Frequency and amplitude of the 1-3 Hz generator (7XT71) f
reversal Q and rotor earth resistance R
C
Measured Values of the Stator Earth Fault Protection (20 Hz)
Voltage and current in the stator earth circuit U
(primary) and the phase angle ϕ
Definition of Power Measurement
The 7UM62 uses the generator reference-arrow system. The power output is positive.
Figure 2-147
SIPROTEC, 7UM62, Manual
C53000-G1176-C149-7, Release date 03.2010
primary
221
222
202
203
211
212
241
) and rotor earth resistance R
ee1
earth
between the current and the voltage at 20 Hz.
SEF
Definition of Positive Direction of Reference Arrows
Address
FACTOR IEE1
FACTOR IEE2
FACTOR UE
UN GEN/MOTOR
SN GEN/MOTOR
Uph / Udelta
SN TRANSFORMER
, total resistance R
earth
, U , current in the rotor circuit I
g g
.
and I , the specific stator earth resistances R
SES SEF
2.49 Auxiliary Functions
%
Parameter
205
213
224
251
252
225
249
(= U
RE
, total reactance X and phase angle
tot tot
, charge at polarity
g
Functions
Address
), earth fault
E
and R
sef sefp
335