Problems that cause high temperature of terminals


There are two possibilities for the high temperature of […]

There are two possibilities for the high temperature of the terminal: the terminal is loose and the contact resistance is too large, which causes overheating; the terminal is not loose, but the circuit is overheated for some unknown reason, such as the power supply voltage is too high, or the load is shorted.

1, the voltage is too high. It can be checked from the source, the secondary voltage of the transformer-the voltage in the distribution box-the voltage of each electrical equipment. The socket can also have assembly buckles and locking buckles. The assembly buckle can be more firmly fixed to the PCB board, and the locking buckle can lock the mother body and the socket after the installation is completed. A variety of socket designs can be used with different mother body insertion methods, such as: horizontal, vertical or inclined to the printed circuit board. You can choose between metric and standard gauges.

2, ground fault. It can also be checked from the transformer and then grounded to the distribution box. The ground should be grounded, and normal phase wires should be grounded. You can use an insulation meter or a shaker to measure when the power is off, and measure in sections. Try to measure only the power supply and distribution lines such as cables, wires, circuit breakers, switches, etc., if it is difficult to segment, unplug the weak electrical equipment, Fuse for sensing equipment.

的 The key to grounding is low ground resistance and large contact area. The former can ensure that the ground point has a "zero potential" as low as possible close to the earth potential, which can avoid the possibility of thunder and lightning going back from the ground line after thunder and into the power supply circuit. The latter can guarantee sufficient capacity to provide a fault current channel, including lightning or short-circuit faults, etc. Because the actual construction technology has been theoretically changed according to the changes of contemporary technology and technology, whether this grounding method works or not depends on how the new standard is specified.