CB211-20

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Circuit breakers are devices found in many electrical systems that are designed to monitor and protect circuits from short-circuits and overloads. The CB211-20, in particular, is a type of circuit breaker that has a significant advantage over traditional thermal-magnetic breakers in terms of its ability to rapidly detect and prevent both overload and short-circuit currents. This guide will explain the application field and working principle of the CB211-20.
The CB211-20 is a 3 pole circuit breaker with a rated current of 100A and a breaking capacity of 40kA. It is primarily used in applications where it is necessary to protect electrical systems from both overload and short-circuit currents. The device is best suited for low and medium-voltage applications, and is suitable for operation in systems with AC current ratings of up to 690 V. It is also capable of withstanding high-inrush currents and is compliant with IEC 60947 international standards.
The CB211-20 is designed to provide users with enhanced protection and safety against faults. The device is equipped with a number of features that help it to achieve this goal. Firstly, the breaker is equipped with a thermodynamic release mechanism and a contact system, both of which work to detect and interrupt the current when the circuit is overloaded or short-circuited. The thermodynamic release is a rapid release system that utilizes temperature sensors along with a trip element located on the breaker body. The contact system consists of a pair of AC and DC contacts. The AC contacts monitor the magnitude of the current while the DC contacts handle the high-inrush currents. This system is designed to activate the breaker even in cases of very low fault current levels.
The CB211-20 also includes a number of safety features to ensure that the user does not come into contact with dangerous live parts. This includes a key locking system for the main switch, as well as additional protections such as a neon indicator for power on/off and a voltage surge arrester to protect against voltage fluctuations. Additionally, the breaker is capable of providing isolation from the mains and the device can be reset through the use of the manual reset button.
In summary, the CB211-20 is a highly effective circuit breaker designed to provide protection against short-circuits and overloads. The device utilizes a combination of thermodynamic release and contact systems in order to detect and prevent dangerous currents. Additionally, the breaker also includes a number of safety features such as a key locking system and a surge arrester. The CB211-20 is well-suited for operations in low and medium-voltage applications and is compliant with IEC 60947 international standards.

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