| 摘要 |
<p>The present invention relates to a distribution board with a back-up breaker capable of minimizing an amount of fault currents which breakers on a rear end receive by reducing the fault current in the back-up breaker if the fault current is generated due to a short circuit and the like. The present invention includes: a power supply bus bar, a main circuit breaker which is combined with the power supply bus bar and supplies power to a load, and the back-up breaker which is formed on a front end of the bus bar and minimizes the fault current loaded on the main circuit breaker by blocking the fault current in the short circuit. Thereby, the implementation costs of the distribution board is remarkably reduced by reducing the capacity of the breaker and increasing the number of the breakers for stabilization in comparison with an existing distribution board by reducing the size of each breaker comprising the main circuit breaker without a problem when the small capacity is used.</p> |
