Protection assistance device of multiple circuit breakers in low-voltage system

A protection assistance device of multiple circuit breakers in a low-voltage system, the protection assistance device, comprising:

• at least one upper low-voltage circuit breaker connected to a first branch circuit between an uppermost power circuit and an upper power circuit, and configured to have a communication unit;
• at least one middle low-voltage circuit breaker connected to a second branch circuit between the upper power circuit and a lower power circuit, and configured to have a communication unit;
• at least one lower voltage circuit breaker connected to a third branch circuit between the lower power circuit and a lowermost power circuit, and configured to have a communication unit;
• and
• a communication line that communicably connects the upper low-voltage circuit breaker, the middle low-voltage circuit breaker, and the lower low-voltage circuit breaker,
• wherein the upper low-voltage circuit breaker, the middle low-voltage circuit breaker, and the lower low-voltage circuit breaker comprise:
• a controller that transmits a communication packet reporting a trip operation state to at least any one of the predetermined upper lower-voltage circuit breaker, the middle lower-voltage circuit breaker, and the lower low-voltage circuit breaker through the communication line, during a trip operation, and
• wherein the controller comprises a program storage unit for storing a rapid spanning tree protocol (RSTP) algorithm.

A protection assistance device of multiple circuit breakers in a low-voltage system, the protection assistance device, comprising:

• at least one upper low-voltage circuit breaker connected to a first branch circuit between an uppermost power circuit and an upper power circuit, and configured to have a communication unit;
• at least one middle low-voltage circuit breaker connected to a second branch circuit between the upper power circuit and a lower power circuit, and configured to have a communication unit;
• at least one lower voltage circuit breaker connected to a third branch circuit between the lower power circuit and a lowermost power circuit, and configured to have a communication unit;
• a communication line that communicably connects the upper low-voltage circuit breaker, the middle low-voltage circuit breaker, and the lower low-voltage circuit breaker,
• wherein the upper low-voltage circuit breaker, the middle low-voltage circuit breaker, and the lower low-voltage circuit breaker comprise:
• a controller that transmits a communication packet reporting a trip operation state to at least any one of the predetermined upper lower-voltage circuit breaker, the middle lower-voltage circuit breaker, and the lower low-voltage circuit breaker through the communication line, during a trip operation;
• and
• a low-voltage circuit breaker additionally connected in the form of an open loop for unidirectional communication to at least any one of the upper low-voltage circuit breaker, the middle low-voltage circuit breaker, and the lower low-voltage circuit breaker, and communicably connected to another external communication network or a higher-level monitoring device.