What is PIR and CSD in an EHV Circuit Breaker? | Explained Simply l

What is PIR and CSD in an EHV Circuit Breaker? | Explained Simply l In this video, we explain what PIR (Pre-Insertion Resistor) and CSD (Controlled Switching Device) are in an EHV (Extra High Voltage) Circuit Breaker, and why they are used in high-voltage power systems. EHV circuit breakers are critical components in transmission networks operating at 400kV, 765kV and above. During switching operations, high transient overvoltages and inrush currents can occur. To control these electrical stresses, utilities use PIR and CSD mechanisms. 🔹 Topics Covered: What is PIR (Pre-Insertion Resistor)? Why PIR is used in EHV circuit breakers? What is CSD (Controlled Switching Device)? Difference between PIR and CSD. How they reduce switching surges ? Practical examples in transmission systems. This video is perfect for: Electrical engineering students Power system engineers Substation engineers Competitive exam aspirants (GATE, PSU, SSC JE) If you're working in transmission, substations, or protection systems, this concept is very in Transmission Lines 📌 Subscribe for more Power System and Substation Engineering videos! 👍 Like, Share & Comment your doubts below. #PIR #CSD #EHVCircuitBreaker #CircuitBreaker #PowerSystem #ElectricalEngineering #Substation #HighVoltage #SwitchingSurge #TransmissionLine #SF6CircuitBreaker #PowerSystemProtection #GATEElectrical #PSUExams #ElectricalConcepts!