How to distinguish the RCD by Differential automatic devices

Very often there is a time that we can not distinguish a differential machine stands in our board or a simple RCD. But a significant difference between them, because the RCD is intended solely to protect against leakage current and Emergency circuit breakers in addition to this function, even protects against overloads. In this article I'll show you how to understand the appearance in front of you or RCD differential machine.

functional difference

Before proceeding to a detailed study of the appearance, let's briefly discuss what their fundamental difference.

So, RCD - will be triggered only if the wiring in your home will be the leakage current.

A machine in addition to the differential residual current protection provides protection against short circuit and overload the network. Thus, it appears that the differential machine combines the RCD and normal switch

That's all the difference between these two switching devices.

Getting to the visual analysis of

Now let's closely examine the appearance of products, and learn to distinguish them by marking symbols are applied.

On the majority of Russian-made products clearly states what type assigned a particular device.

And this designation can be found on the front side as well as on the side. But some foreign and mostly Chinese manufacturers do not bother applying this kind of labeling. Therefore, to understand that we face going forward.

Note the drive letter device name, because it is encrypted as the main purpose of the product. For example, if you see the inscription RCBOs it means that it is - Automatic residual current circuit breaker. A marking WA -vyklyuchatel differential indicates that this is a normal RCD. Here also disadvantage is that Chinese brands are not applied to such labeling.

Carefully look at the letter code. If you see in front of first digits "16" or "32" and right after it a capital letter "A". It means that we face RCD calculated for an electric current of 16 amperes or the 32 Ampere. But if you will go first letter, such as "FROM" and then the number 16, It means that you hold the differential machine and "FROM" It means a type of time-current dependence.

Operating circuit drawn

And the surest way to determine is to study the concept, onaya always applied on the front side of any product. Remember, if before you Emergency circuit breakers, that the schematic illustration of heat will always be present and disengaging the electromagnetic element, and in conventional RCD they simply are not present. It is the safest and surest way to understand what kind of a switching device in front of you.

That's how you can decide that for the switch in front of you, you see nothing daunting is not here. Just be careful and you will succeed. Thanks for attention.

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