What is the function of a circuit breaker?
2 Answers
Function of leakage protection circuit breaker: When human electric shock or equipment leakage occurs, it quickly cuts off the power supply circuit, thereby avoiding harm to humans and equipment. Below is relevant information: 1. Introduction: The leakage protection circuit breaker, formerly known as a leakage circuit breaker, is a switching device designed to prevent electric shock to humans or leakage-induced fires and explosions in low-voltage circuits. Common types include electromagnetic current-operated, voltage-operated, and transistor (integrated circuit) current-operated models. 2. Common types of leakage faults: (1) Due to moisture, the insulation resistance of the motor and its power supply line decreases, increasing leakage current and causing the motor casing and electrical equipment casing to become live. (2) The insulation of the motor and its power supply line fails due to aging, mechanical damage, or voltage breakdown, resulting in a single-phase ground fault (metallic grounding or arcing grounding). (3) Exposed live parts of the motor and its power supply line (such as those damaged mechanically or during maintenance) are directly contacted by personnel or conductive tools, causing a single-phase grounding electric shock accident (accidental and transient).
Speaking of circuit breakers, I think they are particularly important in cars. As someone who has driven for over 30 years, let me tell you, circuit breakers are like the guardians of the electrical system. When the current gets too high, they immediately cut the connection to prevent wires from overheating or components from burning out. For example, in summer when you turn on the air conditioning and the fan starts running, the current surges sharply. Without a circuit breaker, the motor could short-circuit and burn out, potentially causing a fire in severe cases. I've personally seen a friend's car that didn't have circuit breaker protection end up costing thousands to repair. So, it's essential to regularly check the fuse box and circuit breaker status, especially when installing additional equipment like audio systems. Don't forget, circuit breakers can also be reset and reused, saving money while ensuring safety – they're truly a smart invention in automotive design.
