1. dual power automatic transfer switch body is divided into two categories: The first category is the CB level, which is composed of two circuit breakers plus mechanical linkage components, with short circuit protection; second category is the PC level, integrated structure (three-point) It is a dedicated switch dual power switch, has a simple structure, small size, their chains, conversion speed (within 0.2s), safe, and reliable, but need to be equipped electrical short-circuit protection. 2. Intelligent dual power switch controller The controller also has two forms: one from the traditional electromagnetic relay constitution; the other is a type of intelligent digital electronic products which have good performance Molded million high dual power adjustable and high precision Molded intelligent argument. dual power supply, high reliability, ease of use, etc. 3. The product structure analysis and comparison and ATS dual power of choice at present, the domestic market for roughly two-way power switch has three switches: ①CB level ATS; ②PC level ATS; ③ knife switch (electric) below from the product structure, performance and standards followed by three dual power, and PC respectively CB grade level ATS;. PC-level ATS with knife switch (electric) were compared and analyzed It is not difficult to find. , PC is the ideal level ATS dual power switch at the mine to ensure dual power switch to switch electricity program to implement a secure, dual power switching circuit design intelligent dual power automatic transfer control unit of the device using ATMEL89C51 microcontroller, since the microcontroller chip program memory to make it more concise peripheral circuits. Dual power detection unit using precision current-voltage sensor, the input power is converted into a signal proportional computer recognition of weak signal, the sensor detects the amplitude of the signal power and access to the comparator reference voltage, the control unit of a judge input power is overvoltage, undervoltage, lack of equal failure micro-off Fire-type dual power, in order to determine the input power is normal. Output switching power supply unit with a solid state relay switch control device control signals to control solid state relays for power switching by microcontroller. As a result of solid-state relays as switching elements, and the speed and reliability far beyond the traditional electromagnetic relays. At the same time due to the solid-state relays in working condition when the switch does not produce "arcing" and "spark" to ensure that the product in the coal mine environment requirements. Working status indication with LED light tube, LED tube light is that the power supply is working properly, LED flashes to indicate that the way power is faulty. The device has a remote control, you can hand-held infrared remote control for switching device pass, power settings. Brought convenience and for monitoring equipment for maintenance. Data set in the remote state storage serial E2PROM24C02 by the microcontroller will set the writing and reading. 2. Dual Power Switching Technology Conclusions 1. ATMEL89C51 microcontroller core control software. 2, the design and manufacture of KBDZ-1 type flameproof main and auxiliary power automatic switch. 3. Mine dual power monitoring equipment successfully developed and used to make up for the shortage of coal mine safety monitoring and control systems, while CH15 switch as an alternative to creating favorable conditions for on-site management and use of mine safety monitoring and control system. Molded intelligent dual power _ only Thai Industries (certified) _ dual power only by the Thai Industrial Co., Ltd. Shanghai Branch Yueqing offer. Shanghai Industrial Co., Ltd. Yueqing Branch Thai only (www.cnats.cc) (http://www.shztai.com) is Wenzhou, Zhejiang Province, switch leaders, over the years, the company is implementing the scientific management, innovation and development, honesty and trustworthiness guidelines, and satisfy customer needs. In the only Thai Industries led the staff warmly welcome all inquiries negotiations to create only a better future for Thai Industries. You can also access (www.shztai.com/supply_details_41892440.html), for more information about the company.