ABB Electrical S271K1A Circuit Breaker

ABB Electrical S271K1A Circuit Breaker

Basic Parameters

Rated voltage: 277/480V AC, which means that the circuit breaker can work normally in the AC voltage range from 277V to 480V, and can be applied in many different voltage levels of the electrical system to provide protection for the lines and equipment under the corresponding voltage.

Rated current: 1A, this is the rated operating current of the circuit breaker, that is, at this current and below, the circuit breaker can operate stably for a long time, when the current in the circuit exceeds 1A, the circuit breaker will cut off the circuit according to the timely action of overload or short circuit.

Number of poles: 1 pole, indicating that it is mainly used for controlling and protecting single-phase AC circuits, applicable to single-phase electrical equipment and circuits in households, commerce and some industries, such as lighting circuits and socket circuits.

Functional features

Overload protection: the internal thermal release element is equipped, when the current in the circuit exceeds the rated current of 1A for a long time, the bimetal in the thermal release element will be bent and deformed due to heat, which will push the release mechanism into action, thus cutting off the circuit and effectively preventing the lines and equipment from being damaged due to overload.

Short-circuit protection: once a short-circuit fault occurs in the circuit, the instantaneous generation of a huge short-circuit current will make the electromagnetic detacher act quickly, generating a strong electromagnetic force to attract the armature, drive the detacher mechanism, quickly cut off the circuit, the impact of the fault will be limited to the smallest possible range, to protect the equipment and personnel safety.

Withdrawal characteristics: Usually using a specific withdrawal characteristic curve, can be more sensitive, accurate response to fault current, better adapt to different load characteristics and protection needs, effectively avoid overload or short-circuit damage to the equipment.

Application field

Industrial field: It can be used for the distribution protection of some small electrical equipments in factories, such as the branch circuit protection of small motors, control circuits, lighting systems, etc., to ensure the stable operation of electrical equipments in the process of production, and to prevent the interruption of production due to the failure of circuits.

Commercial places: It is suitable for the protection of lighting circuits and socket circuits in shopping malls, office buildings, hotels, etc., to ensure the reliability and safety of power supply, provide stable power support for commercial operations, and avoid the normal development of commercial activities due to electrical failures.

Residential: In the family electricity consumption, it can effectively protect all kinds of small electrical equipment and lighting circuits, prevent electrical fires and other safety accidents caused by overloading or short-circuiting, guarantee the safety of residents' electricity consumption, and provide reliable protection for the family electricity consumption.

OTHER INFORMATION

• Support for a number of new, popular communication protocols, e.g. Advant Fieldbus 100, Profibus DP, LONWorks and Allen-Bradley's DF1. These make your new controllers able to use ABB's new S800 I⁄O system and easily able to communicate, with other external controllers, with ABB's variable speed motor drives and with smart motor-control centers. 

• More backup redundancy available, e.g.: - Smarter solution to CPU redundancy, eliminating critical, common, components, - Full dual redundancy, covering, media and communication in interfaces, for S100 I/O and Advant Fieldbus 100. 

• A self-tuning, adaptive process controller (AC 450) that makes short work out of setting up control loops accurately and responsively, even in difficult applications. 

• Fuzzy logic control, a control method based on degrees of truths as opposedto conventional binary logic that only recognizes two states: true or false. A control strategy that is often able to untangle elegantly control problems that are difficult to solve in other ways. 

• Windows NT-based engineering tool, You save money; StepUp includes: 

• attractive prices on controller cabinets with all the hardware and software required. 

• further savings on future software upgrades by subscription to the ABB Software Advancement Program (described further on).