The process of automatic switch (ATS) to detect power failure is a complex but efficient system operation, which mainly realizes the real-time monitoring and intelligent judgment of power supply status through the built-in controller and sensor. The following are the main steps and mechanisms for automatic switch detection of power failure
First, real-time monitoring of power parameters
Voltage monitoring: The controller monitors the voltage values of the main and backup power supplies in real time and compares them with the preset voltage range. If the voltage is out of the normal range (such as overvoltage or undervoltage), it is considered a power failure.
Current monitoring: In addition to voltage, some ATS also monitor the current value to detect the presence of abnormal conditions such as short circuits or overload.
Second, intelligent judgment and decision-making
Fault identification: When detecting abnormal power parameters, the controller intelligently identifies the specific fault type (such as abnormal voltage, power interruption, and short circuit).
Switching decision: Based on the fault type and the preset switching logic, the controller decides whether a power switch is required. For example, when the main power supply fails, the controller will issue a command to switch the load circuit to the backup power supply.
3. Perform the switching operation
Drive actuator: Once the switching decision is made, the controller drives the actuator (such as mechanical switches, relays, etc.) to switch the power supply.
Ensure that the switchover is successful: During the switchover, the controller continuously monitors the power supply status to ensure that the switchover is successful and the standby power supply is stable.
Fourth, fault alarm and record
Alarm function: When the power failure or switching failure is detected, the controller will issue an audible and visual alarm signal to remind the operator to deal with it in time.
Fault recording: At the same time, the controller also records the fault information in the internal memory for subsequent analysis and troubleshooting.
5. Other auxiliary functions
Remote monitoring: Some advanced ATS support remote monitoring. Users can remotely view device status and receive fault alarms over the network.
Parameter setting: Users can set switching parameters and alarm thresholds on the controller according to actual needs to meet the needs of different occasions.
The concrete realization of the detection method
Voltage detection method: A high-precision voltage sensor is usually used to collect the voltage value of the power supply, and the analog signal is converted into a digital signal by an analog-to-digital converter (ADC) for processing. The voltage detection method should meet the requirements of rapidity, accuracy and selectivity to ensure that switching decisions can be made quickly and accurately in the event of a power failure.
Current detection methods: Similarly, current detection methods use sensors and ADCs to achieve real-time monitoring of current values. When an abnormal situation such as short circuit or overload is detected, the controller immediately cuts off the power supply or switches over.