[dwovexak-210313-01.tif, 1, en_US]
Figure 6-241 Tripping Zone of the Thermal Characteristic Curve (I)
If the Threshold is greater, then a cutoff occurs (see Figure 6-242).
[dwovexab-210313-01.tif, 1, en_US]
Figure 6-242 Tripping Zone of the Thermal Characteristic Curve (II)
Warning Threshold
If the Threshold is exceeded, the time delay (parameter (_:13591:101) Warning delay) is started. If
the time delay has elapsed, the indication (
(_:13591:301) Warning
) will be displayed.
Thermal Behavior
The time derived from the characteristic curve and associated with the V/f value is set to 100 %. With each
function call, the time will be increased according to the respective weighted invocation interval. If the 100 %
value is exceeded, tripping is initiated. If the V/f value is changed, the associated time from the characteristic
curve is added as a new 100 % value.
In order to prevent excessive cooling times, the thermal storage has been limited internally to 150 %. The
fill level
of the thermal storage will be provided as functional measured value.
Protection and Automation Functions
6.39 Overexcitation Protection
820 SIPROTEC 5, Overcurrent Protection, Manual
C53000-G5040-C017-8, Edition 07.2017
To Next Page
Loading...
