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KCQ3 series dual power automatic switch from the devices and automatic controller, and automatic control was divided into automatic recovery, since a vote of no self-recovery, network - Power of three, and devices connected to constitute a different control methods, respectively, different functions Automatic Transfer Switch. Applicable to the exchange 50Hz, rated voltage up to 400V and below the dual power supply system. The interlock switch with electrical and mechanical interlocking dual protection, both three-phase power there than in any one phase voltage, under voltage, over current protection, including circuit and short circuit protection. Widely used in high-rise buildings, hospitals, shopping malls, banks, chemical industry, military installations and other important power supply. Products comply with GB / T 14048.11-2002 and IEC 60947-6-1-1998 standards.