IULNK11-1-72-80.0 Circuit Protection

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Circuit breakers are devices used to protect an electrical circuit from being damaged due to an increase in voltage or current. The IULNK11-1-72-80.0 is a type of molded case circuit breaker (MCCB) designed for use in electrical distribution panels where they provide overload and short-circuit protection. This article will discuss the application field and working principles of the IULNK11-1-72-80.0.

The IULNK11-1-72-80.0 is designed to provide protection for use in three-phase power circuits. It has an interrupting rating of 100 kA at 480V, and a thermal-magnetic trip range from 6.3 to 800A. The device is rated for an ambient temperature of -25°C to +40°C with an altitude not exceeding 2000 m. It can be used to reliably protect equipment and personnel from hazardous overcurrents.

The IULNK11-1-72-80.0 employs a thermal-magnetic trip system, which uses the combination of a thermal device and magnetic device. The thermal device, known as a bimetal strip, is a heat-sensitive element that reacts to overcurrent temperatures. It contains two different metals that expand at  different rates when heat is applied, thus causing a physical and electrical separation in the contact points, which causes the breaker to open.

The magnetic device in the IULNK11-1-72-80.0 is an electromagnet which is energized by the current flowing through the circuit. As the current increases, the magnetic field of the electromagnet increases, causing a mechanical force which operates the contact breaker, thus opening the circuit. The combination of the two devices provide reliable protection from overcurrents in the circuit.

The IULNK11-1-72-80.0 is suitable for a variety of applications including motor starting, capacitor switching, and other mild loads. It is also suitable for residential applications such as protection of outlets, air conditioners, lighting and appliance circuits. Furthermore, it can be used in industrial applications such as protection of main switchboard, transformer static starter, switchgear final distribution board and feeder circuits.

In addition to its application field, the IULNK11-1-72-80.0 also provides a number of features which make it an attractive option. This includes adjustable trip settings with reset/lockout buttons, a compact design, enhanced safety features including UL and CSA certification, and a self-monitoring function that can detect short-circuits.

In conclusion, the IULNK11-1-72-80.0 provides reliable protection against overcurrents in residential, commercial, and industrial applications. It uses a thermal-magnetic trip system to detect overcurrents and protect personnel and equipment from hazardous currents. The device offers a number of features such as adjustable trip settings, self-monitoring, and UL/CSA certification to ensure safe operation.

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