MV Capacitor Interview Question and Answer
1️⃣ Principle of a Shunt Capacitor & Applications Answer: A shunt capacitor is connected in parallel with a power system to improve power factor and voltage stability. It works by supplying reactive power (leading VARs) to balance the lagging reactive power of inductive loads. Principle: It stores energy in an electric field and releases it, thereby compensating for reactive power. Applications: Power factor correction in industries. Voltage support in transmission/distribution systems. Reduction of line losses. Increasing system capacity without adding new generation. 2️⃣ Routine & Type Tests for MV Capacitors Routine Tests (every unit, as per IEC 60871 / IS 2834): Capacitance measurement. Tan δ (dissipation factor) measurement. Insulation resistance test. AC withstand voltage test between terminals. AC withstand voltage test between terminals and container. Type Tests (on prototype or selected sample): Thermal stability t...