The function of the plug-in terminal:
The plug-in terminal series adopts the easy-to-operate pluggable connection and the firm and universal screw method to combine, and various parts are connected. The plug-in terminal is made up of two parts plug-in connection, one part presses the wire tightly, and then plugged into the other part, this part is soldered to the PCB board. The mechanical principle of this connection bottom, this anti-vibration design is the long-term airtight connection of the product and the usability of the finished product. Mounting ears can be added at both ends of the socket. The mounting ears can protect the tabs to a large extent and prevent the tabs from being arranged poorly. At the same time, this socket design can correctly insert the socket into the mother body.

Common problems of plug-in terminal blocks:
Various problems often occur during the use of plug-in terminal blocks.
The problem that caused the burn:
If the plug-in terminal is black, one of the possibilities is not to burn black, and oxidation may also be black. So how to verify whether it is burnt black? The method we take is to wipe it off with a finger. If it can be wiped off, like soot, it is a black substance formed by oxidation, which can only be wiped off with sandpaper or a file.
Problems that cause high temperatures
There are two possibilities: the plug-in terminal is loose and the contact resistance is too large, thereby overheating; the terminal is not loose, but the circuit has overcurrent heating due to some unknown reason, such as the power supply voltage is too high, or the load is short-circuited.
1. The voltage is too high. You can check from the source, the secondary voltage of the transformer-the voltage in the distribution box-the voltage of the electrical equipment.
2. Ground fault. You can also find it from the transformer, and then go to the distribution box for grounding. The grounding should be grounded, and the normal phase line should eliminate the grounding fault. You can use an insulation meter or a shaking meter to measure when the power is cut off, and measure in sections. Try to measure only the power supply and distribution lines such as cables, wires, circuit breakers, and switches. If it is really difficult to section, unplug the weak current equipment The fuse of the sensing device.
The key to grounding is that the grounding resistance should be low and the contact area should be large. The former can have a grounding point with a "zero potential" that is as low as possible close to the ground potential, which can avoid the possibility that lightning will return from the grounding line and enter the power supply circuit after lightning strikes. The latter can have enough capacity to provide a fault current channel, including lightning or short-circuit faults and so on. Because the actual construction process theoretically has always been changed according to the changes of contemporary technology and technology, whether this grounding method works or not depends on how the new standard specifications are stipulated.

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