2 Functions
114
7UM61 Manual
C53000-G1176-C127-3
spond to the actual thermal behaviour of the object to be protected, any desired char-
acteristic can be implemented by entering customer-specific trip times for the specified
U/f overexcitation values. Intermediate values are determined by a linear interpolation
within the device.
The characteristic resulting from the device default settings is shown in the Technical
Data Section Overexcitation Protection. The following figure illustrates the behaviour
of the protection if on pickup threshold configuration (parameter 4302 U/f >) lower
or higher values than the first setting value of the thermal characteristic are selected.
Figure 2-34 Tripping Range of the Overexcitation Protection
The following figure shows the logic diagram for overexcitation protection. The counter
can be reset to zero by means of a blocking input or a reset input.
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