Functions
6-1697SJ63 Manual
C53000-G1140-C120-1
− Minimum and maximum values for the above mentioned long-term averages, in-
cluding the date and time they were last updated, in primary values.
− Real and reactive energy flow (including direction of flow) in kWh, MWh, or GWh
primary; or in kVArh, MVArh, or GVArh primary.
−Θ/Θ
out
overload protection values for stator and rotor in % of the trip initiating ex-
cessive temperature,
− I
Greal
and I
Greactive
real and reactive components of the sensitive ground current de-
tection as secondary quantities in mA.
The measured values are updated at a period of ≥ 0.3 s and ≤ 1 s.
The minimum and maximum values are listed with the date and time of the latest up-
date. Using binary inputs or a SCADA interface, the maximum and minimum values
can be reset. In addition, the reset can also take place cyclically, beginning with a pre-
selected point in time.
For the long-term averages mentioned above, the length of the time window for aver-
aging and the frequency with which it is updated can be set. The associated minimum
and maximum values can be reset, using binary inputs or by using the integrated con-
trol panel in the DIGSI
®
4 operating program.
Transfer of
Measured Values
Measured values can be retrieved by SCADA, or through DIGSI
®
4.
Set points To recognize extraordinary operational conditions, warning levels can be pro-
grammed. When a programmed limit value is exceeded (or fallen below), a message
is generated that can be masked to both output relays and LEDs. In contrast to the
actual protective functions, such as time-overcurrent protection or overload protection,
this monitoring program may becomes lower.
The following individual limit value levels are configured, when delivered from factory:
− Falling below a preset current in any phase
− Exceeding a preset maximum average current in Phase A
− Exceeding a preset maximum average current in Phase B
− Exceeding a preset maximum average current in Phase C
− Exceeding a preset maximum average positive sequence current
− Exceeding a preset maximum average real power
− Exceeding a preset maximum average reactive power
− Exceeding a preset maximum average apparent power
− Falling below a preset power factor
6.19.3 Waveform Capture
The 7SJ63 relay is equipped with an oscillographic data saving feature. The momen-
tary values for the measurement quantities
I
a
, I
b
, I
c
, I
G
, and I
Ns
, and V
a
, V
b
, V
c
, 3V
0
(voltages depending on the connection) are scanned at intervals of 1.04 ms for 60 Hz
(1.25 ms for 50 Hz) and stored in a revolving buffer (16 samples per cycle). For a fault,
www . ElectricalPartManuals . com
To Next Page
Loading...
