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When will terminal blocks be used?
Terminal blocks are used to facilitate the connection of wires. They are actually a piece of metal enclosed in insulating plastic, with holes at both ends for inserting wires and screws for fastening or loosening. For example, two wires sometimes need to be connected and sometimes need to be disconnected. In this case, terminals can be used to connect them and they can be disconnected at any time without the need to weld or wrap them together, It's very convenient and fast. Moreover, it is suitable for the interconnection of a large number of wires. In the power industry, there are specialized terminal blocks, terminal boxes, all of which are terminal blocks, single-layer, double-layer, current, voltage, ordinary, interruptible, and so on. A certain crimping area is used to ensure reliable contact and sufficient current flow. Terminal blocks are actually called terminal blocks.
1. What is the purpose of the grounding terminal strip in the distribution box?
Answer: The grounding terminal is a specialized terminal for grounding wires. Currently, China's electricity consumption is three-phase four wire system. The zero and ground wires are separated. The ground wire is generally connected to the ground wire of the socket to protect electrical safety!
2. When is a terminal strip used?
Answer: Terminal blocks are required for wire connections between different devices, and some plugins (modules) also require terminal blocks.?? 3. When is a terminal strip required in an electrical cabinet?
Answer: Taking an installation unit as the boundary, entering and exiting this unit requires a wire terminal strip.?? 4. What does 4EN in the terminal block model mean?
Answer: 4EN represents a contact area of 4 square millimeters.
5. What are the functions of terminal blocks?
Answer: Convenient wiring; When installing a power distribution cabinet, the signal lights or meters on the cabinet door must be terminated. Convenient line checking; Convenient measurement in case of malfunction. Node expansion; Extension of nodes with the same wire number.
6. How to select transformers and terminal blocks during substation design?
Answer: The capacity of the transformer needs to be calculated, neither too large nor too small; The distance between the terminal block and the ground is generally not less than 350mm, and the current circuit must use OT connected current test terminals.