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  • Users: protkid1
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  1. protkid1

    Rated breaking current vs small inductive breaking current rating

    Hi friends, My EHV CB (rated 145 kV) is rated for breaking capacity 40 kA. But the reactor breaking current is only 315 A. Also, the Cable charging current breaking capacity is 160A only. However, the Back to Back Capacitor Switching current breaking capacity is 400A. Why the current values...
  2. protkid1

    Pre-insertion resistors

    Is it possible to use Pre-insertion resistors in a 132 kV GIS CB. The switching duty is for energizing a shunt reactor supplying a 100 km long 132 kV cable. The studies indicate a huge DC offset without current zeroes for approx 1.5 sec. Inserting a resistance can decay the DC component faster...
  3. protkid1

    DC current breaking capabilities of an EHV CB

    Hi friends, I have a 275 kV SF6 CB having the following rating : Rated short time withstand : 40 kA Rated peak withstand : 100 kA Rated making current : 100 kAp Rated breaking current asymmetrical : 40 kA Out of phase breaking current: 10 kA First pole to clear factor : 1.5...

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