Basler Electric BE1-11t - Manual (Page 52)

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Figure 34. Overexcitation Settings Screen
Table 9. Operational Settings
Setting Range Increment Unit of Measure Default
Mode Disabled or Enabled n/a n/a Disabled
Pickup (Inverse Time) 0 or 0.5 to 6 0.01 v/Hz 0
Time Dial (Inverse Time) 0 to 9.9 0.1 units 0
Reset Dial (Inverse Time) 0 to 9.9 0.1 units 0
Curve Exponent (Inverse Time) 0.5, 1, or 2 n/a n/a 1
Pickup (Definite Time 1 & 2) 0 or 0.5 to 6 0.01 v/Hz 0
Time Delay (Definite Time 1 & 2) 50 to 600,000 varies milliseconds 50
Settings Example
The overexcitation element is used to de-energize a generator or transformer that is experiencing an
overexcitation condition. Therefore, the manufacturer's overexcitation limit curves are required to
establish optimum protection. Figure 35 and Figure 36 show examples of a transformer and generator
limit curve along with the optimum composite protection characteristic.
Note
Actual damage curves must be obtained from the equipment
manufacturer for the particular equipment to be protected.
Overexcitation (24) Protection BE1-11t