AB-3S / 40.5 permanent magnet vacuum circuit breaker with a permanent magnetic actuator unique design and high reliability intelligent controller. The device is mainly used in medium voltage overhead power lines as points, co-load current, overload current, short-circuit current. Specific functions are as follows: 2.0 Real-time monitoring of real-time monitoring of A, B, C, and zero-sequence current value, a phase PT voltage. 2.1 with UPS function with UPS function; exchange loss of power can be combined or more points 50 times, to ensure that work within 48 hours. 2.2 Definite time protection definite time protection according to the traditional three-current protection mode (quick break, break speed limit, overcurrent) were 2.3 zero zero sequence synthesis sequence protection functions, alarm, action is optional. 2.4 reclosing function according to the number of pre-tuning multiple reclosing function. 2.5 In case of a fault when closing the hand function manual closing, fails, the controller immediately disconnect without reclosing lockout. 2.6 Anti-Surge features a permanent magnet controller provides control panel operation, * operating points, closing function. 2.8 Communication function (reserved) and mobile communications products can achieve remote control. In order to achieve telemetry, remote adjustment, remote control, remote four remote functions. 2.9 LCD functions for product tuning, setup, intuitive view of various parameters. 2.10 event recording function to record the most recent 255 events. 2.11 Memory various settings automatically enter data memory unit, 10 years is not lost. 2.12 remote signal level detection function detects the current state of the switch, points, closing position. 2.13 Display automatic protection in case no button is pressed, to protect the LCD, the display automatically turns off after three minutes, press any key to return the display to the main page. 2.14 automatic standby power management features to save standby power, in the absence of external power is automatically turned off after five minutes of battery power when you need to use to restore; automatic recovery after the call.