IEL1-29314-2-V

IEL1-29314-2-V circuit breaker is a three-pole circuit breaker with overload and short circuit protection function, which can respectively shut off overload and short circuit circuit within certain time. It has been widely used in medium voltage switch cabinet, cabinet and so on. This article mainly introduces the application field and working principle of IEL1-29314-2-V circuit breaker.

Application Field

IEL1-29314-2-V circuit breaker is mainly used in three-phase AC power system of 10-12.5KV frequency 50 or 60Hz, for over-load and short circuit protection, it can also be used for power distribution system of enterprises, public institutions and residential areas. This circuit breaker has automatic operation, manual operation and shunt trip operation.

Working Principle

When an over-current or short circuit occurs, the current flows from the current loop of the circuit breaker to the upper and lower heads of the trip coil, and enters the trip coil through the upper and lower terminals. When the current reaches the closing value, the lower magnetic pole of the trip coil will generate a strong magnetic field, pull the armature, and the armature uncovers the power trip, thus cutting off the circuit. At this time, the current decreases rapidly, the magnetic field around the armature is gradually weakened, and the power contact is automatically closed.

In addition, the IEL1-29314-2-V circuit breaker also has a trip-free mechanism, that is, when the breaker is open, if there is an over-current, it will not be closed immediately. This is because the pressure plate in the armature is raised by the strong magnetic field to separate the power contact from the armature, so it cannot close until the magnetic field decreases. This design can effectively prevent repeated closing, thus avoiding further damage.

In summary, IEL1-29314-2-V circuit breaker can provide safe and reliable over-load and short circuit protection for many electrical systems. Its application field and working principle are introduced in this article, which brings readers a comprehensive understanding of circuit breaker.