249-8-3975-3

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Circuit Breakers are one of the most important components in electrical systems. They are used to protect a variety of equipment from potential damage caused by an electrical fault or overload. The classification, application field and working principle of one type of circuit breaker, code 249-8-3975-3, will be discussed in this article.

249-8-3975-3 circuit breakers are small, compact, frame-mounted units, designed for use in low-voltage control circuits. The breaker is rated at 10A, 250VAC, with a double pole, normally open function. The circuit breaker can be used to control power to motors, electric pumps, lighting, and other low current load applications.

The 249-8-3975-3 circuit breaker works in a few steps. Initially, a small current is sent through the circuit to open the bimetallic element. This current will continue to flow until the bimetallic element reaches a predetermined temperature, which is dependent on the current rating of the breaker. When the temperature reaches the critical level, the contact opens and the circuit is broken. A thermal override switch ensures that the circuit will not be re-energized until the temperature has cooled to a safe level.

To protect the circuit against short circuits and overloads, the 249-8-3975-3 circuit breaker is designed with a "trip-free" mechanism. This mechanism prevents the breaker from being re-closed until the overload has been removed. The thermal-magnetic principle of operation helps to ensure that the circuit is not re-energized until the fault condition has been eliminated.

The 249-8-3975-3 circuit breaker is UL1077 recognized and certified for use in low-voltage motor control circuits. It is also UL recognized as a "high-interrupting capacity" breaker, which means that it can interrupt current up to 10,000A. This means that the breaker will protect the circuit against all kinds of overloads, short circuits, and other types of faults that may occur.

In conclusion, the 249-8-3975-3 circuit breaker offers protection for low-voltage control circuits in a wide range of applications. The breaker is designed with a trip-free mechanism that prevents the circuit from being re-energized until the fault condition has been eliminated. The thermal-magnetic principle of operation makes this breaker well-suited for use in motor control and similar situations. With itsUL1077 certified high-interrupting capacity, the 249-8-3975-3 circuit breaker is an ideal choice for protecting circuits against all kinds of overloads, short circuits, and other types of fault conditions.

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