While evaluating circuit breaker ratings, it is necessary to appreciate the distinguishing characteristics such as the voltage ratings, interrupting capacity, and operational reliability that make each breaker unique. The primary functions of circuit breakers include protecting the electrical system from overloads and short circuit within the circuits. A circuit breaker suitable for the application will be able to improve the overall safety and efficiency of the electrical installation as the customers desire. The miclot.com.ua shows sufficient evidence and understanding of the characteristics and uses of the diverse types of circuit breakers in making decisions that enable power customers satisfy their operational needs and safety requirements.