ABB Electrical S273-K50 Circuit Breaker

ABB Electrical S273-K50 Circuit Breaker

Basic Parameters

Rated voltage: suitable for AC 277V/480V circuits, can also be used for DC 60V circuits.

Rated current: Rated current is 50A.

Number of Poles: 3 poles.

Size and weight: product dimensions of about 3 x 3 x 4 inches, weighing about 15 ounces.

Functionality

Protection features:

Overload protection: achieved by an internal thermal release element. When the current in the circuit for a long time more than 50A rated current, the bimetal in the thermal release element will be bent and deformed due to heat, pushing the release mechanism to act, thus cutting off the circuit, effectively preventing wiring and equipment damage 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 cause the electromagnetic release device to act quickly, generating a strong electromagnetic force to attract the armature, drive the release mechanism to quickly cut off the circuit, limiting the impact of the fault to a minimum range, to protect the equipment and personnel safety.

Withdrawal characteristic: adopting K-type withdrawal characteristic curve, which is unique to ABB and has been verified by 70 years of practice, the response to fault current is more sensitive and precise, which can better adapt to the protection needs of motor system or transformer system and other loads, and effectively avoid damages to the equipment caused by overloads or short circuits.

Installation: Plug-in installation, which is simple and convenient, can be easily mounted on standard guide rails and flexibly laid out in distribution cabinets and other electrical equipment, saving installation space and time and improving installation efficiency.

Application Fields

Industrial field: It can be used for the distribution protection of all kinds of electrical equipment in factories, such as the branch circuit protection of motors, transformers, distribution cabinets, etc., to prevent equipment damage and production interruption due to circuit faults, and to ensure the continuity and stability of the production process.

Commercial places: It is suitable for the power distribution protection of lighting system, socket circuit, air-conditioning system in shopping malls, office buildings, hotels, etc. to ensure the reliability and safety of power supply and provide stable power support for commercial operations.

Residential: In the family electricity, it can protect all kinds of electrical equipment and lighting circuits, preventing electrical fires and other safety accidents caused by overloading or short-circuiting, and guaranteeing the safety of residents' electricity consumption.

FEATURES

• Process Station with integrated fieldbus  capability  

• 4 high-speed fieldbus lines  

• Supports different fieldbus types, even  simultaneously:  PROFIBUS-DP, up to 12 MBd  Modbus  CAN  Foundation Fieldbus H1 (with LD800  HSE)  

• Easy engineering:  fully integrated in Control Builder F  

• One unified database for field devices  shared by the control level and the Human  System Interface (HSI)  

• Module recognition with factory and operational parameters  

• Comprehensive diagnostics for proactive  maintenance  

• Compact, rugged design  

• Front panel connectors  

• DIN Rail (C-rail) or wall mounting for easy  installation  

• Ambient temperature 0-60 °C (32-140 °F)  with temperature monitoring  

• EMC certification according to EN50082  

• Certification:  CE, NAMUR, CSA, UL, EN61000-6-2.