ABB Electrical S271-K4 240V AC Circuit Breaker

ABB Electrical S271-K4 240V AC Circuit Breaker

Basic Parameters

Rated voltage: 240V AC, suitable for conventional 240V AC circuits, can provide protection for electrical equipment and lines under this voltage level.

Rated current: 4A, at this current and below, the circuit breaker can operate stably for a long time, when the current exceeds 4A, the circuit breaker will cut off the circuit according to the overload or short-circuit condition.

Number of poles: 1 pole, can be used for controlling and protecting single-phase AC circuits, widely used in single-phase electrical equipment and circuits in households, commerce and some industries.

Functional features

Overload protection: The bimetal in the internal thermal release element will be bent and deformed by heat when the current exceeds 4A rated current for a long time, which will push the release mechanism to cut off the circuit and prevent the line and equipment from being damaged by overload heat.

Short-circuit protection: Once the circuit is short-circuited, the instantaneous generation of a huge short-circuit current makes the electromagnetic release device act quickly, generating a strong electromagnetic force to attract the armature driven release mechanism, quickly cut off the circuit, limiting the scope of influence of the fault, to protect the equipment and personnel safety.

Withdrawal characteristics: adopting K-type withdrawal characteristic curve, it can respond to the fault current more sensitively and accurately, better adapt to different load characteristics and protection needs, and 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.

Supported ABB I/O Systems and Families

• S800 I/O, a distributed modular I/O system for communication via ModuleBus  and PROFIBUS DP. 

• S900 I/O, a remote I/O system (for hazardous areas) that can be connected to  PLCs via PROFIBUS DP. 

• S200 I/O and S200L I/O, two compatible, modular I/O systems. S200 I/O  modules can be connected via CI856 or PROFIBUS DP to PLCs. • S100 I/O, a rack-based I/O system that can be connected to PLC using the  CI856 interface module. 

• Satt I/O, makes it possible to use Satt Rack I/O (an older Satt I/O system)  connected to PLC using the CI865 communication interface.

Our Main Brands

· - ABB Advant-800xA，Advant OCS，Bailey Infi 90 and Net 90，H&B Freelance 2000，DSQC Robots，IGCT / IGBT

· - GE General Electric Field Control, Genius I/O, QuickPanel, RX3i PacSystem, Series 90, Series 90, Series VersaMax

· - Allen Bradley Allen-Bradley SLC500, MicroLogix, CompactLogix, ControlLogix, PLC-5, Panel View,

· - Bently Nevada 3300 System, 3500 System

· - Honeywell 7800 Series, FSC, IPC, Mxopen, TDC 2000, TDC 3000, Experion PKS(C200,C300)

· - Yokogawa Centum CS - Centum VP, Centum XL - micro XL, FA-M3, ProSafe-PLC

· - Ovation, Foxboro, EPRO, Emerson DeltaV, Fuji, Siemens, HIMA, Prosoft, Invensys Triconex, ICS TRIPLEX, Woodward, Bachmann, Schneider