What are terminal blocks for?

What does the terminal block do? What are the functions and main electrical of the terminal block? Terminal block is used to facilitate the connection of wires, it is actually a piece of metal sealed inside the insulating plastic, there are holes at both ends to insert wires, there are screws for fastening or loosening, such as two wires, sometimes need to be connected, sometimes need to be disconnected, this can be used to connect them with terminals, and can be disconnected at any time, without having to weld them up or twisted together, it is very Convenient and fast.
And suitable for a large number of wires interconnection, in the power industry there are special terminal row, terminal box, above all the terminal row, single layer, double layer, current, voltage, ordinary, can be broken and so on. A certain crimping area is to ensure reliable contact, as well as to ensure that enough current can pass. In fact, the terminal block is also called terminal block.
A: What is the purpose of the grounding terminal block in the distribution box?
A: The grounding terminal is a special terminal for the ground line, now our electricity is three-phase four-wire system. Zero and ground are separated. The ground wire is generally connected to the ground wire of the socket to protect the safety of electricity!
Second: what circumstances use the terminal block?
A: The connection of wires between different devices requires a terminal block, and certain plug-ins (modules) also require a terminal block.
Third: When do I need a terminal block in an electrical cabinet?

A: An installation unit as a boundary, in and out of this unit will need line terminal block.
Fourth: What does the 4EN in the terminal block model model mean?
A: 4EN indicates that the contact area of 4 square millimeters.
Fifth: What is the role of the terminal block ah?
A: Convenient wiring; such as in the installation of power distribution cabinets, cabinet doors on the signal lamp or meter should be on the terminal. Check the line is convenient; easy to measure when a fault occurs. Node expansion; the same line number node expansion.
Six: how to choose the transformer and terminal block in the substation design?
A: The capacity of the transformer to be calculated, too large or too small can not be; terminal row to ground distance is generally not less than 350mm, the current circuit must be used OT wiring current test terminals.

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