What is the electrical clearance in the electrical ready board box?

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When talking about the topic of power electrical ready board box, we often mention electrical clearance. What is electrical clearance? Today, the manufacturer of the electrical ready board box will introduce the electrical clearance for you.


Low voltage electrical ready board box is a common electrical equipment. We firmly believe that many people are not unfamiliar with it. We can often see many bare charged bodies appear in the cabinet door, just like the copper (chemical equation Cu) brand. Generally, such bare charged bodies are arranged in an orderly manner, and there are some gaps between different bare charged bodies and enclosures. In the industry, we call them electrical gaps, and there is also a related technical term, creepage distance. Here comes the question. What is the clearance? What is the effect of leaving electrical clearance? How much clearance should be left?


1、 What is electrical clearance and creepage distance


1. The creepage distance is based on the path of the circuit fault (the current does not pass through the high-power electrical appliances and is connected to the switching power supply) between the two components measured along the surface of the insulating layer or between the electronic components and the safety protection page of the machine and equipment. In other words, under different conditions, because the insulating layer material (resin material) around the electric conductor is metal electrode, the insulating layer material may exhibit induced electrification, which is called creepage distance.


2. The electrical clearance is the distance between the two components or between the components and the machine and equipment safety protection page. That is to say, on the premise of maintaining the stability and safety of electrical equipment characteristics, the route of insulating layer can be achieved according to the gas.


2、 Index value of bare charged body:


The electrical clearance between the different bare charged bodies and their shells in the bottom pressure metal meter box shall be greater than 20mm, and the electrical clearance between the bare charged bodies in the control circuit and the metal products of the grounding device shall be greater than 20mm. When the bus duct spacing is less than 20mm: the insulation layer shall be bundled, and the maximum spacing shall be in accordance with the following requirements:


3、 Efficiency of clearance and creepage distance:


In simple terms, the electrical clearance and creepage distance inside the low-voltage electrical ready board box are actually two main parameters related to the electrical insulation layer. In the application of industrial control products such as automobile relays and power switches, in addition to following relevant specifications, appropriate electrical spacing and creepage distance shall be set to maintain the stability of their electrical characteristics.


4、 FAQ:


1. Creepage distance value is greater than electrical clearance value.


2. Move the parts to make them in a bad position;


It seems that the simple electrical ready board box actually has a lot of knowledge. It is not simple to install the components in the box. Proper installation methods can make the electrical service life and application time profitable. In addition, it can reduce the common electrical faults profitably. In addition to installing the electrical ready board box, we also need to maintain the electrical ready board box daily.

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