Settings Example - Basler BE1-11g Instruction Manual

9424200994 Rev U

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 38 and Figure 39 show examples of a transformer and generator
limit curve along with the optimum composite protection characteristic.
Actual damage curves must be obtained from the equipment
manufacturer for the particular equipment to be protected.
1000.0
Inverse
105%, TD=1.9
100.0
10.0
1.0
100% 105%
BE1-11g
Note
Volt/Hz Characteristic
Generator Limit
Definite
118%, 6s
110% 115% 120%
Percent of Nominal V/Hz
Figure 38. Time Shown on Vertical Axis
Transformer Limit
125% 130% 135%
Overexcitation (24) Protection
47
140%