流接触器，工频变转换开关
及起动，停止钮等。可根据不同用户的工艺要求设计原理，选择器件配制各种适当的操作方法。
铜管或电缆布线，电缆布线须配电缆夹紧密封接头。
BBP-frequency converer board for motor control change speed of general three-phase asynchronous motor by means
of changing output frequency,which is suitable to processing technology and sa-ving energy up to 30%～60%,and
do as soft starting controller motor,by means of those circuits with sensor and speed adjustor the board could
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