For the electrical industry, there are many factors that need to be considered when choosing the appropriate terminal block to complete the wiring. Generally, there are several aspects to determine the wiring environment, space, wiring area, wiring method and the size of the voltage and current that need to be passed.
Environmental factors are one of the most important reference factors - for example, terminals with high temperature resistant materials should be selected in high temperature environments. In environments with heavy humidity, it is necessary to choose terminals with very good sealing performance and excellent moisture resistance. In acid and alkali environments, it is necessary to choose materials that can resist acid and alkali.
The size of the space limits the choice of products under certain conditions. In a narrow space, only smaller size terminals can be selected. If the fixing method is a rail type, but the height of the terminal plus the rail exceeds the wiring space, other methods can only be selected. fixed terminals. Double-layer or multi-layer terminals are required when the height is sufficient to connect multiple cables.
The wiring area is also an important factor affecting the selection of terminals. For example, if the area of the cable is 2.5 square meters, should we actually choose 2.5 square meters or should we choose a larger terminal? In fact, in many cases, we need to choose a normal wiring larger than 2.5 square meters. Because in actual use, we need to use not only direct wiring, but also some accessories to assist wiring, such as cold-pressed terminals, SC terminals, etc., so the actual operating wiring area will be larger than the area of the cable.
The selection of voltage and current is similar to the selection of the size of the terminal area. Usually, there is no problem with voltage and current, but high voltage and high current will be generated at the moment when the circuit is disconnected and connected, so the voltage and current required in this case are far Much higher than the voltage and current in the normal working environment, these factors also need to be taken into account in the actual selection.
For the comprehensive selection of terminals, it is necessary to consider the actual use environment and foreseeable special circumstances