The device is characterized in that an alternating current contactor KM1 of the main power supply is at an actuation position, and an alternating current contactor KM2 of the standby power supply is at a release position; otherwise, the alternating current contactor KM1 of the main power supply...
When the motor start circuit of closed star-delta conversion is started, firstly, the contactors (KM1), (KM2) are closed orderly, after ten seconds, the contactor (KM3) is closed, and then, the contactor (KM1) is switched off; after the contactor (KM3) is closed for two seconds, ...
1 海里(n mile) =1.852 千米(km) 1 码(yd) =3 英尺(ft) 1杆(rad ) =16.5 英尺(ft) 1 英里(mile) =5280 英尺(ft) 1 海里(n mile) =1.1516 英里(mile) 1 英尺(ft) =12 英寸(in) 面积换算 1 平方公里(km2 ) =100 公顷(ha) =247.1 英亩 ...
变频运行,也可以经过KM1工频运行;2#电动机可 以经过KM3、KM6变频运行,也可以经KM4工频运 行。其中KMI与KM2、KM5,KM4与KM3、KM6实 现电气互锁;KM2与KM3、KM5与KM6实现互锁, 确保一台电动机不会同时处于变频、工频两种运行 状态,一台变频器不会驱动两台电动机运行。 收稿日期:2012-06-09 作者简介:成福...
The frequency-conversion soft-start control loop comprises a power supply loop and a low-voltage control loop, wherein in the power supply loop, a water pump I M1 and a three-phase power supply are connected via a thermal overload relay FR1 and a contactor KM2 sequentially, and the water...
A control loop mainly includes a button switch SB1, a button switch SB2, a relay KM3, a contactor KM1, a contactor KM2, an electrifying time delay relay KT1 and an electrifying time delay relay KT2, wherein the single interlock circuit is characterized in that the elements are ...