As shown in the illustration, which of the following pieces of equipment is supplied with a circuit breaker providing both overload and short-circuit protection? EL-0165

Correct Answer: Option D — Sewage Treatment Plant

The Sewage Treatment Plant, as a complex auxiliary system, requires comprehensive protection. Circuit breakers for such equipment are designed with dual-trip elements: a thermal element for sustained overload protection and a magnetic element for instantaneous short-circuit protection, ensuring the safety of both the motor and the branch circuit wiring.