8330-FG19-PRBS-LXAB004-3A Circuit Protection

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8330-FG19-PRBS-LXAB004-3A Circuit Breakers: Application Field and Working Principle

Circuit breakers are essential components in electrical networks and are widely used in electrical control, protection and distribution systems. The 8330-FG19-PRBS-LXAB004-3A is a type of circuit breaker, and it is usually applied in industrial and commercial premises. This article will discuss the application field and working principle of this device.

Application Field

The 8330-FG19-PRBS-LXAB004-3A is suitable for protection against overcurrent long-term as well as instantaneous short-term overcurrent. It has an interrupting rating of 150kA@480V AC and 100kA@277V AC. It is a versatile and reliable circuit breaker with excellent features, such as UL 489 standard certification and a slim design with a width of only 2-1/2". The circuit breaker can be used in an AC power supply system for protection of loads and line circuits operated at 277V and/or 480V. It is mainly used for industrial, commercial, and entertainment applications such as amusement parks and stadiums, short-time overcurrents such as short circuits, overloads, and motor starting current surges, and longer-term overcurrents such as branch circuit and load faults.Additionally, the device can be combined with other components, like fuses, overload relays, and contactors, to provide additional protection and flexibility. It is also suitable for use in damp and dusty environments due to its IP20 rating for operating temperature up to 40°C and 100% relative humidity. Furthermore, the device is designed with advanced thermal and magnetic protection features to ensure its stability and safety performance.

Working Principle

The 8330-FG19-PRBS-LXAB004-3A is an integrated circuit breaker, which has electromechanical components such as an arc interruption mechanism and contactors. The circuit breaker’s working principle is simple: when the current in the circuit exceeds the predetermined setting - usually expressed in amperes or kiloamperes - the device trips and interrupts the circuit. When that happens, power to the load is cut off. When the circuit breaker is in the main “off” position, the contacts of the device are closed and power can travel through safely. When the circuit breaker is in the main “on” position, the contacts open and power is blocked. Moreover, the device has a switch handle that is used to manually open and close the contacts.Inside the device, the thermomagnetic principle is used to trip the switch. A bimetal strip is heated when an overcurrent flows through it, and it will move and open the contact points as soon as the temperature reaches a certain level. The arc interruption mechanism is also involved in the process: when the contacts are opened, the arc interruption mechanism will extinguish any arcs that may be present.

Conclusion

The 8330-FG19-PRBS-LXAB004-3A Circuit Breaker is an excellent protection device, suitable for various application fields, such as industrial, commercial, and entertainment. It is based on the thermomagnetic and arc interruption principles and can be used with other accessories, such as fuses, overload relays, and contactors, to provide additional protection. This device is a cost-effective way to protect circuits from overcurrents, both short-term and long-term.

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