Probe domestic switch needle KG-300K, with a head diameter of 3.0mm, is a normally open switch needle used in various industrial applications.

AVX TPSE226M035R0125 is a low-impedance tantalum capacitor, known for its high reliability and stability in electronic circuits.

Electronic scale crystal oscillator with dimensions of 3.2x2.5mm (3225 package), operating at 16MHz, 12pF, with accuracy ranging from 10PPM to 30PPM.

Manufacturer direct sales LED lamp bead for patch lighting, 0805 size, white light, super bright indicator light, ideal for use in various lighting systems.

Photocoupler, also known as optocoupler, is a device that transfers electrical signals between two isolated circuits using light.

(1) Processing of Line Fault Tripping 1) First, return to the scene and check the recorded light signal, meter readings, switch indicators, and protection action signals to identify any anomalies. 2) Investigate the cause of the switch failure to trip. Focus on checking the color of the switch’s position, oil level, presence of oil leakage, and whether the circuit is locked out or not. Open the disconnect switches on both sides of the faulty switch. 3) Report to the dispatch center and follow instructions to isolate non-faulty lines, such as the busbar. 4) Conduct an external inspection of the control circuit of the affected line, including DC fuses, terminals, DC bus voltage, switch auxiliary contacts, trip coil, switch mechanism, and overall appearance. Identify the root cause of the tripping. If the issue can be resolved quickly, restore power immediately. If not, report it to the relevant department for further investigation and repair. (2) Main Transformer or Bus Fault Tripping Handling 1) & 2) Follow the same steps as above. 3) If there is a protection action, determine which transformer or equipment caused the over-tripping based on the protection signal. Carefully inspect the corresponding bus or main transformer. If no protection signal is present, conduct a comprehensive check of all buses and transformers to identify the fault scope and possible causes. Disconnect all switches on the de-energized bus, pull the three-side switches and isolators of the faulty bus or main transformer, and report the situation accordingly. 4) Restore operation of the unaffected devices according to the dispatch command. Transfer the load from the faulty bus or main transformer to the normal equipment and contact the relevant department to troubleshoot the faulty components.