Electronics
Testing of complete sets of low-voltage switchgear and control equipment
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Testing of complete sets of low-voltage switchgear and control equipment
What are the detection methods for circuit breakers< p> The first method is to check the appearance and touch temperature. The first step in checking the circuit breaker is to check the appearance. Check whether the wiring terminals at the upper and lower ends of the circuit breaker are yellow, gray, or even fried. If there is any fried situation, it is usually caused by poor contact, which may have been damaged. If this situation occurs, it should be replaced in a timely manner. Touching the temperature is also a good method. If a circuit breaker has already encountered a problem, it may have local high temperatures, or if the circuit breaker is too small or the wires are too thin, this situation can occur. If this situation occurs, it can also be determined that the circuit breaker is in good condition and replaced in a timely manner to avoid safety issues The second method is to use a measuring pen to measure voltage. If you don't have a multimeter or other measuring tools at hand, you can also use a measuring pen to determine the quality of the circuit breaker. Determine the voltage at both ends of the circuit breaker and use a measuring pen to measure the voltage to see if it is balanced. If the output voltage of 380V is less than 380 or there is no voltage measured, it is possible that the circuit breaker has been damaged, and it should be replaced in a timely manner. However, due to the uneven quality of the test pen and the possibility of voltage loss if the circuit is too long, sometimes the values measured by the test pen cannot be used as a basis for judging whether the circuit breaker has been damaged. At this point, we need to use the third method. The third method is to use a multimeter to measure not only voltage, but also current. When measuring voltage, if it is a 380V circuit breaker, the value we measured in pairs is 380V. If the value is 220V, it is possible that the circuit breaker is open or there is a short circuit. But because the circuit breaker has not been powered off, we cannot use a resistance range or a clear two to determine whether the circuit breaker is connected. If a multimeter is used to measure directly at this time, it means that the parallel circuit will burn out the multimeterFunction of testing report:
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