LEL1-30645-3

Circuit Breakers are used in many applications. The LEL1-30645-3 Circuit Breaker is a common type of breaker used in a wide range of applications. This article will look at the application field and working principle of the LEL1-30645-3 breaker.

Overview

The LEL1-30645-3 is a break-before-make molded-case circuit breaker (MCCB) designed to provide short-circuit, overload and overcurrent protection in accordance with UL489. The breaker features a molded-in operating mechanism and motorized trip features (due to its “2-step” design). The breaker is suitable for industrial, commercial and building applications, as well as in HVAC applications. It is UL-listed to 25kAIC.

Application Field

The LEL1-30645-3 is ideally suited for a variety of applications, including industrial, commercial and building applications, as well as in HVAC applications. It can be used to protect wiring and equipment from overloads, short circuits and ground faults. The LEL1-30645-3 is also capable of being used as a branch-circuit breaker in a panelboard, or as a companion breaker for a disconnect switch.

The breaker is rated for 600V and up to 40A, with a motorized trip feature (25kAIC). It is suitable for use with copper or aluminum conductors and can be used in control circuits, motor controls, and with thermal units.

Working Principle

The LEL1-30645-3 circuit breaker employs a 2-step trip operation. The primary operation is designed to trip the breaker at a preset current level when it senses an overload. The secondary operation then trips the breaker if the current exceeds the preset level for a prolonged period of time. The motorized trip feature enables the breaker to trip more quickly than a standard circuit breaker.

The breaker has two operating poles, which are connected in series. When power is supplied to the breaker, the primary operation is activated and the contacts close. When an overload is detected, the primary operation trips the breaker and the contacts open, thereby interrupting the current flow. The secondary operation then trips the breaker if the current exceeds the preset level for a prolonged period of time.

When the power is restored, the breaker will reset itself, re-closing the contacts, and will continue to provide overload protection.

Conclusion

The LEL1-30645-3 is a break-before-make molded-case circuit breaker (MCCB) designed to provide short-circuit, overload and overcurrent protection in accordance with UL489. It is suitable for a variety of applications and features motorized trip features (25kAIC). The breaker employs a 2-step trip operation and, when power is restored, it will reset itself and continue to provide overload protection.