Grading capacitors are sometimes used on circuit breakers of multi-break design (two or more identical making/breaking units connected in series) to obtain uniform distribution of the voltage stresses across the open gaps. The grading capacitor is connected in parallel with each and every making/breaking unit and has a standard value of 1600 pF/capacitor. The total capacitance across one open pole is calculated as follows: Ctot = Cgr/n Where: Cgr is the capacitance of each grading capacitor. n is the number of making/breaking units connected in series
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