What is the terminal block used for? What are the functions and main electrical functions of the terminal block?

What is the terminal block used for? What are the functions and main electrical functions of the terminal block? The terminal block is used to facilitate the connection of wires. It is actually a piece of metal enclosed in insulating plastic. There are holes at both ends to insert the wires. There are screws for fastening or loosening, such as two wires. Sometimes Need to connect, sometimes need to disconnect, this matter can be connected with terminals, and can be disconnected at any time, without having to weld or twist them together, it is very convenient and quick.

And it is suitable for a large number of wire interconnections. In the electric power industry, there are special terminal blocks and terminal boxes, all of which are terminal blocks, single-layer, double-layer, current, voltage, ordinary, breakable, and so on. A certain crimping area is to ensure reliable contact and to ensure that sufficient current can pass. In fact, the terminal block is also called the terminal block.

One: What is the purpose of the grounding terminal block in the distribution box?
Answer: The ground terminal is a dedicated connection terminal for the ground wire. At present, the electricity consumption in our country is a three-phase four-wire system. The neutral wire is separated from the ground wire. The ground wire is generally connected to the ground wire of the socket to protect the safety of electricity use!

Two: Under what circumstances should the terminal block be used?
Answer: The wire connection between different devices requires a terminal block, and some plug-ins (modules) also require a terminal block.

Three: When do you need a terminal block in the electrical cabinet?
Answer: Taking an installation unit as the boundary, a wire terminal block is required to enter and exit this unit.

Four: What does 4EN mean in the model number of the terminal block?
Answer: 4EN means the contact area is 4 square millimeters.

Five: What is the function of the terminal block?
Answer: It is convenient for wiring; for example, when installing a power distribution cabinet, the signal lights or meters on the cabinet door must be equipped with terminals. It is convenient to check the line; it is convenient to measure when a fault occurs. Node expansion; node expansion of the same line number.

Six: How to choose transformer and terminal block in substation design?
Answer: The capacity of the transformer must be calculated, too large or too small will not work; the distance between the terminal block and the ground is generally not less than 350mm, and the current loop must use the current test terminal with OT wiring.