| 摘要 |
<p>This invention relates to a circuit breaker and in particular, this invention relates to the circuit breaker having a three phase line. This invention also relates to the circuit breaker which is simple in structure, small in outline size, convenient to operate, and easy to assemble. This invention also relates the circuit breaker in which automatic closing only can be completed when the three phase power supply is qualified perfectly; and a problem that loop closing cannot be realized when multiple power supplies are electrified can be solved and the closing alarming function is realized.</p> |
