Siemens siprotec SJ62, Руководство пользователя

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2.1 General
44
SIPROTEC 4, 7SJ62/63/64 Handbuch
C53000-G1140-C147-A, Edition 07.2015
2.1.3 Power System Data 1
2.1.3.1 Description
The device requires certain basic data regarding the protected equipment, so that the
device can adapt to its desired application. These may be, for instance, nominal power
system and transformer data, measured quantity polarities and their physical connec-
tions, breaker properties (where applicable) etc. There are also certain parameters
that are common to all functions, i.e. not associated with a specific protection, control
or monitoring function. The following section discusses these data.
2.1.3.2 Setting Notes
General This data can be entered directly on the device featuring an integrated or detached
operator panel for parameters
209 PHASE SEQ.
,
210 TMin TRIP CMD
,
211 TMax
CLOSE CMD
and
212 BkrClosed I MIN
. Select the MAIN MENU by pressing the
MENU
key. Press the
▼
key to select SETTINGS and the
X
key to navigate to the set-
tings selection. To obtain the Power System Data display, select the
P.System Data
1
in the SETTINGS menu.
In DIGSI double-click on Settings to display the relevant selection. A dialog box will
open under the option
P.System Data 1
with the tabs Power system, CTs, VTs and
Breaker where you can configure the individual parameters. Thus the following Sub-
sections are structured accordingly.
Nominal Frequency The rated system frequency is set at address
214 Rated Frequency
. The factory
presetting in accordance with the model number must only be changed if the device
will be employed for a purpose other than that which was planned when ordering.
Phase Rotation Re-
versal Address
209 PHASE SEQ.
is used to change the default phase sequence (
A B C
for
clockwise rotation), if your power system permanently has an anti-clockwise phase se-
quence (
A C B
). A temporary reversal of rotation is also possible using binary inputs
(see Section 2.21.2).
Temperature Unit Address
276 TEMP. UNIT
allows you to display the temperature values either in
degree Celsius or in degree Fahrenheit.
Polarity of Current
Transformers At address
201 CT Starpoint
, the polarity of the wye-connected current transform-
ers is specified (the following figure applies correspondingly for two current transform-
ers). This setting determines the measuring direction of the device (forwards = line di-
rection). Modifying this setting also results in a polarity reversal of the ground current
inputs
I
N
or I
NS
.