AKH-0.66L residual current transformer is specially used for collecting low-voltage residual current signals, and can be used in conjunction with ARCM series of electrical fire monitoring devices, ARD series of motor protection devices and ASJ series of residual current relays. The product can output 0-5(2)mA or 0-1V for the second time, and there are round hole type and square hole type for users to choose according to their needs. It is suitable for shopping malls, hotels, airports, banks, hospitals, factories and other places.