High-voltage electrical substations utilize sulfur hexafluoride circuit breakers to isolate transmission faults. Inside the breaker's expansion chamber, technicians install molecular sieve desiccant packets to absorb residual moisture, which would otherwise react with arc byproducts to generate corrosive hydrofluoric acid. During scheduled five-year maintenance, technicians replace the desiccant and recharge the sealed tank until the pressure reaches 0.65 megapascals before energizing the bus bar. If an internal density monitor registers a drop below 0.58 megapascals, an automated interlock halts breaker operation to prevent catastrophic contact failure.
According to the passage, what occurs when the circuit breaker's internal pressure falls below 0.58 megapascals?
- AThe five-year maintenance cycle is automatically reset.
- An automated interlock halts breaker operation.Cevap
- CCorrosive hydrofluoric acid is released to seal the chamber.
- DTechnicians immediately energize the main bus bar.