QLB-303-00DNN-3BA

Series:	QLB
Part Status:	Active
Lead Free Status / RoHS Status:	--
Breaker Type:	Thermal
Moisture Sensitivity Level (MSL):	--
Current Rating:	30A
Voltage Rating - AC:	250V
Voltage Rating - DC:	32V
Number of Poles:	1
Actuator Type:	Push to Reset
Illumination:	--
Illumination Voltage (Nominal):	--
Mounting Type:	Panel Mount

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Introduction

Circuit breakers are widely used to protect electrical equipment and associated wiring from excessive overload currents, short circuits and ground faults. The QLB-303-00DNN-3BA is a three-pole circuit breaker, used to interrupt overcurrents in high-voltage and low-voltage distribution networks. It features high reliability and is robust, fireproof and easy to install.

Application Field

The QLB-303-00DNN-3BA is suitable for controlling and protecting a range of single-phase and three-phase systems with voltages up to 630 volts. It is designed to provide reliable protection for motors, transformers, and other loads, in residential, commercial, and industrial applications. This circuit breaker is available in a variety of frame sizes, from 100 to 1600 amps, and is available with auxiliary contacts for control and alarm circuits.

Working Principle

The QLB-303-00DNN-3BA operates on the principle of overcurrent protection. When the current exceeds the rated trip level, the circuit breaker trips, disconnecting the circuit and preventing further current flow. To reset the circuit breaker, the user simply pushes in a reset button. The QLB-303-00DNN-3BA also incorporates a dual-function tripping unit which trips the circuit breaker on overload or short circuit and alarms if it senses a continuous fault.

Advantages

The QLB-303-00DNN-3BA circuit breaker is designed for outstanding performance in the protection of residential, commercial and industrial electrical systems. It provides reliable protection from overcurrents, short circuits, and ground faults. The breaker is UL listed and can handle up to 1600 amps of fault current. It also features an adjustable trip unit to set the start of the tripping curve, as well as adjustable time delay for control and alarm circuits. The circuit breaker is also fireproof, making it ideal for use in hazardous environments.

Conclusion

The QLB-303-00DNN-3BA is a reliable and robust three-pole circuit breaker designed to provide reliable protection from overcurrents, short circuits, and ground faults. It is suitable for controlling and protecting a range of single-phase and three-phase systems, and is available in frame sizes up to 1600 amps. It features an adjustable trip unit, adjustable time delay, and an UL listing, making it an ideal choice for applications requiring superior protection.

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