The core part is composed of high-performance single chip microcomputer, including CPU module, relay module, AC power module and man-machine dialogue module, which has the advantages of strong anti-interference, stability and reliability, and convenient use.
The buttons on LCD digital display screen and standby automatic switching panel make the operation simple and convenient, and remote control can be realized through RS485 communication interface.
principle
The device adopts AC uninterrupted sampling method to collect signals, and then carries out real-time Fourier calculation, which can accurately judge the state of power supply and switch power supply with delay.
The standby automatic switching device has the function of on-line operation state monitoring, and can observe the information of each input electric quantity, switching value, setting value and so on. It has reliable software and hardware watchdog function and event recording function.
When the product is used in power supply and distribution circuits with different voltage levels, such as 1 10kV, 10kV and 0.4kV systems, different electrical parameters need to be set, which must be indicated when ordering.
function
When selecting the standby automatic switching function, be sure not to switch to under-voltage protection, so as to avoid refusing or misoperation caused by conflict.
Due to the wide application of microcomputer line automatic switching protection device in modern power system, the demand for uninterrupted power supply has been more reliably guaranteed, which has played an important role in the process of power automation.
Extended data
Operating conditions of standby automatic switching device:
First of all, there must be a standby power supply or standby equipment.
Secondly, when the working bus voltage drops, the standby power supply or equipment can only be put into operation after the standby automatic switch trips the working power supply circuit breaker; In another case, the working power supply system fails partially, and the protection action trips the working power supply circuit breaker first, and then puts into standby power supply or equipment.
The third condition is that the bus voltage of the standby power supply meets the requirements. The voltage transformer shall be installed on the bus. If it is a double bus, it should be installed. In some places, in order to realize reclosing, voltage transformers are installed on the line side.
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