Siemens SIPROTEC 4 7VE61, Руководство пользователя

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The permissible frequency deviations Δf (Parameter 6152
df SYNC f2>f1
or 6153
df SYNC f2<f1
)
decrease with high circuit breaker closing time (6120
T-CB close
) depending on the selected forward angle
Δα (Parameter 6154
dα SYNC α2> α1
or 6155
dα SYNC α2< α1
) as illustrated in Figure 2-35 . This
displays the area below the example for the drawn curves Δ α = 60° and Δα = 30° of the particular working
range of the 7VE61. A meaningful selectable circuit breaker setting time is set only in the range of the partic-
ular curve.
[ve61-arbeitsbereich-deltaf-te-170603-kn, 1, en_GB]
Figure 2-35
Working range in the 1 1 /
2
channel version of the 7VE61
Transformer Taps
With the device variant 7VE63 transformer tap acquisition can be implemented via binary inputs for up to 62
stages.
For inserting transformer tap indications the following procedure is necessary:
•
A transformer tap indication must be inserted in the configuration matrix under DIGSI (see Figure 2-36 ).
•
The characteristics of a transformer tap indication must be set (see Figure 2-37 ). For the common para-
metrizable coding (binary code, BCD code, „1-of-n“ code) four selection values (number of taps, number
of bits, display offset and stage jump) establish which bit patterns correspond to the individual trans-
former taps and in which form they are represented in the device display and in the event buffer.
On input of the “Moving contact” option the tap setting is recognized as valid and applied when the
moving contact signals that the taps have been reached.
•
The indication must be allocated to a binary input. Only then does this transformer tap appear in the
selection of the parameter 6160
TAP CHG. OBJ.
. Please note with regard to numbering that only
directly consecutive binary inputs can be used.
After selection of the transformer tap indication under address 6160 this is incorporated in the synchronisa-
tion depending on setting of the parameters 6161 and 6162. For this 6161
#STEP NOM. VOLT
describes the
tap number for primary rated voltage U1 and 6162
TAP STEP
interval between the taps in %.
Functions
2.2 Paralleling Functions
70 SIPROTEC 4, 7VE61 and 7VE63, Manual
C53000-G1176-C163-3, Edition 10.2017