Quite often, non-specialists in electrical engineering with great difficulty distinguished standing in the instrument panel, unable to deal with the fact that in front of them - Emergency circuit breakers or RCD.
In this situation, the possibility of serious error when it is considered that the circuit is protected against overload and short circuit, while the installed device performs only one function. It is therefore important to understand the features that distinguish Emergency circuit breakers of the device, responsive only to current leakage.
The main differences between the signs
In identifying the differences between the two devices is necessary to proceed from the following factors:
- The function performed by this device.
- External (visual) signs.
- inclusion scheme.
Each of these approaches to defining differences require separate consideration.
Functional
The difference in functionality is primarily manifested in the fact that the protected line installed in the differential device combines the functionality of a conventional machine and the RCD.
Usage ibid protection device capable of performing only the inherent function - to shut off the circuit at the drain exceeds the allowable value. That is, the main difference between them is that the Emergency circuit breakers in a single housing contains a conventional AB and RCD (pictured below).
In contrast, a separate RCD performs only one function (disconnects the line if there is an earth leakage). Having dealt with how they differ functionally, you can go to the second approach in order to distinguish them in appearance.
external differences
To implement this method of determining the need to become familiar with the appearance of both units (photo below).
First of all, you should allocate some well recognized signs which specialists distinguish the two devices in the form of:
- On all domestic samples of such products, as well as a number of foreign models has clearly marked - "differential switch" (ie RCD).
- If on the face of the device is visible clearly visible abbreviation RCBOs - it is already Emergency circuit breakers.
Note: These methods are somewhat inconvenient in that to detect the differences need to remove the devices from the DIN-rail.
It should also be defined with their marking, in which there are differences of elements (the already mentioned "WA" or "RCBOs"). The disadvantages of this method include the inability to identify the foreign protection devices. Then there is the method of determining the type of product for its characteristics.
As in most of the RCD models and their close analogues - Emergency circuit breakers, the main parameters are indicated in the form of a set of characters (numbers and letters). If the numbers followed by the letter "A" - this means the RCD. If the front panel should first English letters C, and then the number 16 - it is already RCBOs.
By choosing one of the options, it is possible to visually ascertain differences appliances.
Features Wiring diagram
Last, the "control" method of determining the difference involves the study inclusion schemes. It does not necessarily refer to the documentary samples (instructions or passport). On most models surveyed instruments it is applied directly on the front panel of the product (photo below).
In the diagram Emergency circuit breakers must be present characteristic icons of its constituent releases, which naturally do not have RCD. In conclusion, we note that even the novice master Electrical Installation is a snap to set differences between the RCD and Emergency circuit breakers.
It is enough to read carefully driven in the review's recommendations and follow them strictly in surveys.