3500-K20-SI-5A

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Circuit breakers are electrical devices used to protect circuits from damage due to overcurrent, short circuits, and other undesired conditions. It is important to understand the application field and working principle of these circuit breakers in order to correctly select and use them correctly. This article will discuss the 3500-K20-SI-5A circuit breaker and its application field and working principle.

The 3500-K20-SI-5A circuit breaker is a type of medium-voltage circuit breaker designed to power industrial and commercial applications. It has a continuous current rating of up to 3,500 amps, a voltage rating of up to 15kV, and a short-circuit rating of up to 20kA. This circuit breaker is designed with a thermal-magnetic trip unit, thermal elements, and manually operated auxiliary contacts.

The application field of the 3500-K20-SI-5A circuit breaker is in motor protection, power distribution, and building power supplies. It can be used to provide protection against short circuits, overloads, and arc faults in large-scale industrial and commercial applications. It is also suitable for aircraft and ship installations, as well as medical and educational facilities.

The working principle of the 3500-K20-SI-5A circuit breaker is based on the thermal-magnetic trip unit. When an overload or short-circuit current passes through the breaker, the trip unit detects the presence of the current and releases the breaker’s contacts. The breaker also has thermal elements that detect the temperature of the current and cause the breaker to trip if the current exceeds the breaker’s thermal rating. Finally, the 3500-K20-SI-5A breaker has manually operated auxiliary contacts that can be used to trip the breaker manually if needed.

In conclusion, the 3500-K20-SI-5A circuit breaker is designed for use in industrial and commercial power distribution applications. It uses a thermal-magnetic trip unit to detect overloads and short circuits, as well as thermal elements that detect high temperatures and manually operated auxiliary contacts. The 3500-K20-SI-5A circuit breaker is a reliable solution for providing protection against large-scale faults and power supply issues.

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