What are the specific triggering conditions for safety devices such as overload protection and short-circuit protection of underground lamps?

As a lighting device buried underground for a long time, the working environment of underground lamps is complex and changeable. They have to withstand pressure and impact from the ground and deal with severe weather conditions. Therefore, the overload protection mechanism has become a key link in the safety design of underground lamps. This mechanism ensures that the lamps work within the normal operating range by monitoring the current changes in the circuit, avoiding safety hazards such as equipment damage or even fire caused by excessive current.

The overload protection mechanism of underground lamps is usually implemented by combining current sensors and intelligent control chips. When the current in the circuit exceeds the preset safety threshold, the current sensor will quickly capture this change and pass the signal to the intelligent control chip. The control chip then starts the overload protection program, and limits the current to a safe range by adjusting the circuit parameters or cutting off the power supply, thereby protecting the lamps from damage. It should be noted that the overload protection mechanism of underground lamps is not static, but can be flexibly adjusted according to actual needs. For example, in areas with dense traffic and high lighting demand, the threshold of overload protection can be appropriately increased to ensure that the lamps can work stably during peak hours; while in areas with sparse traffic and low lighting demand, the threshold can be appropriately lowered to save energy and extend the service life of the lamps.

In addition to overload protection, underground lamps are also equipped with short-circuit protection mechanisms to deal with more serious circuit failures. A short circuit refers to the accidental connection of two points in a circuit, causing the current to bypass the load and flow directly, resulting in serious consequences such as circuit overheating, equipment damage, and even fire.

The short-circuit protection mechanism of underground lamps is also based on intelligent control chips and sensor technology. When a short circuit occurs in the circuit, the sensor immediately detects the abnormal current change and transmits the signal to the control chip. After receiving the signal, the control chip will quickly start the short-circuit protection program to prevent the short-circuit current from continuing to flow by cutting off the power supply or initiating other emergency measures, thereby protecting the lamps and related equipment from damage.

Unlike overload protection, short-circuit protection pays more attention to response speed and accuracy. Because once a short circuit occurs, it often leads to serious consequences quickly, so the short circuit protection mechanism must have extremely high sensitivity and immediacy. At the same time, the short circuit protection mechanism also needs to cooperate with the overload protection mechanism to form an indestructible safety line to ensure that the underground lamp can operate stably under any circumstances.