Build Daily

Machines, Rc Ds, Meters

August 12, 2017 18:07

Learn to distinguish the differential RCD machine - 4 external tag

Very often inexperienced electricians and home master did not know how to determine what is in the plate - Emergency circuit breakers or RCD.As a result, you can mistakenly think that the wiring is protected against overload and leakage current, in fact, from the first security situation does not provide protection becausein the panel is the usual residual current device.In this article, we consider not only functional difference between the two devices, but also show you how to distinguish RCD from Emergency circuit breakers visually.

  • difference Function
  • visual difference

difference Function

Briefly describe than tripping device is characterized by a differential circuit breaker.Quite simply:

  1. RCD is triggered only when the leakage current is detected in the circuit.
  2. Emergency circuit breakers include features of this device + RCD breaker.Total differential machine works not only during the current leakage, but also short-circuit and overload the network.

Combined protection

This is the main functional difference between the two devices.Check that it is better to put the RCD or Emergency circuit breakers, you can in our corresponding article.Now we'll show you how in appearance to distinguish them.

visual difference

Who photo examples, we will demonstrate how to determine what is installed in the panel.In total, we will talk about 4 obvious signs that you need to be sure to remember.

  1. Look what is written on the body.Unless of course you bought cheap Chinese products, it is unlikely in the side wall or in front of it will be written that it is.However, all domestic devices, and even some foreign products have on the body clearly marked - "switch differential" (also known as RCD) or "residual current circuit-breaker" (aka diffavtomat).This method is inconvenient in that in order to distinguish products, which are mounted next to each other, it is necessary to remove them from the DIN-rails, or title to be closed.The specific name
  2. Once again, note the name.Yes, marking also gives a clear notion of what is installed in the panel.According to claim 1 is written in full name of the device is possible to understand what a "VD" and what is "RCBOs."The disadvantage of this method of determining - for foreign devices may be domestic abbreviations as, for example, in Legrand products.Designation RCBOs
  3. look at the specifications.As for the RCD, and the differential machine, the technical characteristics are indicated by numbers and letters.So, if you see a number, and after the letter "A", for example, 16A or 25A, it means that the panel found the RCD, which denotes the rated current.If the casing is designated at letter, figure and then, for example, C16, then it RCBOs.The letter "C" in this case refers to the type of time-current characteristics.Read more about the technical characteristics of circuit breakers can be found in the corresponding article.It is for this procedure can easily distinguish between phones.In the photo below again duplicate this rule: The difference in the characteristics
  4. look at the diagram.And the last, so to speak, a controlling way to distinguish RCD and Emergency circuit breakers - a look at the circuit.In the scheme of thermal and electromagnetic release will be additionally marked differential machine, are absent from the pattern of the differential switch.This difference is also significant in determining the device.scheme

Additionally, we recommend to watch the video, which clearly shows how in appearance to determine what is installed in a cabinet:

main differences
YouTube Preview

Here we are given the instructions for young electricians and home craftsmen.As you can see, in fact, nothing complicated, but the distinction between the protective devices and automatic differential weighty enough.Hopefully, now that you know how to distinguish RCD from Emergency circuit breakers visually!

It will be interesting to read:

  • How to determine the phase and neutral grounding
  • difference from the vanishing
  • How Emergency circuit breakers connected to the network