Short Circuit Fault In The Terminal Block? Complete Analysis Of Detection And Prevention Methods
Short circuit fault of terminal blocks is a common problem in electrical systems, which may cause equipment damage or even safety accidents. Common causes include poor contact, insulation failure, loose or corroded terminals, etc.
test method
Resistance measurement: Remove the terminal blocks on both sides of the control computer ECU and sensor, and measure the resistance between the corresponding terminals. If the resistance value is not greater than 1 ohm, it indicates that the wire is normal. At the same time, measure the resistance between each terminal block of the connectors on both sides and the vehicle body. If the resistance value is greater than 1 ohm, it indicates that there is no short circuit fault between the wire and the vehicle body.
Appearance and contact pressure inspection: Remove each terminal one by one, check for rust and dirt on the connector terminals, clean and inspect the terminal pieces for looseness or damage, and ensure that the terminals are securely fixed.
Infrared thermal imaging detection: Using an infrared thermal imaging device to identify the overheated areas of cables and contacts, the high-temperature areas may be the source of short circuits.
Prevention methods
Regular maintenance: Regularly check the fastening of the terminal blocks, clean dust and oil stains, and prevent an increase in contact resistance due to oxidation or corrosion.
Material selection: Choose high-quality insulation materials and metal conductors to ensure that the terminal blocks have good electrical and mechanical properties.
Installation specifications: Strictly follow the specifications for the installation of terminal blocks to avoid poor fixation or contact caused by improper installation.
Use protective devices: Install circuit breakers, fuses, or leakage protectors in the circuit to promptly cut off power in the event of a short circuit fault, preventing the accident from escalating.
Environmental control: Keep the environment where the terminal blocks are located dry and clean, and avoid damage to the terminal blocks caused by moisture and dust.
