ATSE dual-supply dual power automatic switching device selection strategy to improve power supply reliability requirements with dual power business, anti-accident measures are maturing, more and more advanced equipment investment is applied to the power supply system. Dual power automatic switching device is a microprocessor-controlled device in the net electric power system or grid electricity and grid electricity supply and generator start switch for continuous power source can supply. Over the past two-way power user, the low pressure side of the manually operated switch bidirectional isolation switching operation, so often misuse and cause accidents. Currently in use of special intelligence equipment, with automatic recovery, since the vote of no self-recovery and power generators switching function of three, three-phase voltage rms and phase two-way real-time detection of power supply dual power supply manufacturers, when any phase overvoltage, undervoltage, phase, can automatically switch from the exception to the normal power supply. Currently, dual power automatic switching device is widely used in hospitals, hotels and mining. Dual power automatic switching operation of the apparatus handle dual power automatic switching device start cause of the accident is automatically switched. Starting from the protection of contacts. Transformer group, plant protection and other export-hop changed the power switch at the same time work, quick start cutting device to switch dual power prices, fast cutting device according to pre-set the automatic switching mode (series while) were open and close operations. Irregularities automatic switching. There are two unusual cases, one bus voltage loss. After the bus voltage is lower than the tuning voltage setting up delay, start their own devices, according to the automatic mode switching. Second, the power supply switch mistakenly jump from job switch starter auxiliary contacts when switching conditions are met together on standby power. Automatic switching device when switching process met automatic switching devices starting conditions, loss of pressure side of the power line switch tripped, mother of the investment, to restore power. Very few dual power automatic switching devices of the main circuit switching equipment selection Parameter Description 1. Power grounding type are TN-C system TN-C system, the function of a combination of neutral and protective conductors in a conductor, dual power the number of poles of the main circuit switching device automatically switches off the electrical power cord only. That AC single-phase two-wire unipolar; AC two-phase three-wire system with bipolar; AC three-phase four-wire three-pole; TN-C current system leads to L + and unipolar switches PEN (dc) when off L +; TN- DC system uses C leads to L +, L- and PEN (dc) when bipolar switch L +, L-. 2. Power grounding type are TN-S system TN-S system, the use of a separate protective conductor. If the neutral ground of two power supplies are always grounded by the same bus ground. When the installation of the leakage current operated protective devices, they should be able to protect the circuit disconnect all live conductors. 3. Power grounding type TN-S system, respectively, and TT systems TT power system has an exposed conductive parts directly to ground by means of dual power pole grounding, the grounding electrode electrically independent of the power system grounding, So the choice of dual power automatic switching poles main circuit switching equipment to cut all power cords. 4. Power grounding type TN-S systems are IT systems and IT power system for all live parts are isolated from the ground, or is there a point by impedance grounding, electrical installations exposed conductive parts or independent ground or concentrate with the system The grounding point. 5. Intelligent dual power between the two devices is such a reliable way power switch, in order to ensure the supply of equipment. When the common power anomalies, intelligent dual-supply device can automatically switch to standby power, intelligent dual-supply device consists of two parts of the switch body and the controller. Switch body motor control used by the power switching circuit breaker by mechanical interlocking mechanism and backup power circuit breaker, and then control the power switch. Controller for voltage sampling to determine whether the abnormal power, if there is an exception should produce a corresponding switching. Dual dual power supply companies _ _ Guiyang Thai Industries ended only by the Thai Industrial Co., Ltd. Shanghai Branch Yueqing offer. Shanghai only Thai Industrial Co., Ltd. Yueqing Branch (www.cnats.cc) strong, credible, in Wenzhou, Zhejiang switch industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead only Thai Industries and you hand into the brilliant, for a better future!