Paidong Industrial Zone Qiligang,Yueqing City,Zhejiang province,China.
Paidong Industrial Zone Qiligang,Yueqing City,Zhejiang province,China.
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    23 May, 2022
    Posted by elcb_admin
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    What are the specifications of common RCCBs?

    What are the specifications of common RCCBs?

    The application of RCCB(Residual Current Circuit Breaker) can effectively improve people’s quality of life.

    In order to improve daily life, people have more and more household appliances in their homes, but there are also more safety problems when these household appliances are used.

    Ensuring the safety of people and household appliances has become an important issue that we urgently need to solve.

    The correct selection and installation of RCCB(Residual Current Circuit Breaker) is one of the simple, economical, safe, and reliable solutions, and is widely used in the protection of civil houses and electrical equipment.

    The use of RCCB(Residual Current Circuit Breaker) in residential buildings can improve the safety of electricity consumption, and at the same time can effectively avoid safety problems.

    At present, the common household RCCB specifications on the market include 16A, 20A, 25A, 32A, 40A, 63A, etc., and there are also 80A, 100A, and other specifications in the industry.

    The current specifications of the RCCB are 6mA, 10mA, 30mA, 50mA, 100mA, etc. Under normal circumstances, household leakage protection should use a high-sensitivity leakage protector with a leakage current of 30mA.


    Why is the 30mA RCCB circuit breaker more suitable for houses and home?

    The 30mA trip current of RCCB is determined according to the human body’s ability to withstand current and its duration.

    The human body can tolerate smaller currents for a long time and tolerate larger currents in a shorter period of time.

    According to the test results, 30mA is considered to be a suitable and safe leakage protection circuit breaker for household use.

    The low-sensitivity type leakage protector with leakage action current value of 50mA and above cannot be used as household leakage protection.

    So, can we use the 10mA RCCB in the household? The answer is: There are certain problems, it is easy to malfunction, and also affect normal use.

    It can be seen that the 30mA specification is the best. It can not only achieve effective preventive electric shock protection but also take into account the direct contact click protection.


    How to choose a RCCB ?

    The RCCB can be divided into AC type RCCB (ordinary type) and A-type RCCB(DC pulsation type).

    Many customers do not know how to distinguish between AC type and A type when purchasing. Here is a little trick to distinguish the type of RCCB by checking the product identification.

    The difference between the two types of RCCB is that the AC type leakage protector only protects against AC leakage, and cannot act on DC pulsation leakage, and cannot protect it; while the A-type RCCB protects against AC leakage.

    It can also protect against DC pulsation and leakage.


    What is the button with”T” on the RCCB?

    It is the test button of the RCCB. Its function is to simulate the leakage situation.

    The main function of this button is to check whether the leakage protection measures are broken and whether they are still working normally.

    If the human body touches the live wire, the current flows through the human body to exceed 30 mA.

    If the RCCB can be tripped by pressing the test button, it means it is normal. Otherwise, you need to check whether the leakage protector is normal.

    Press the test button every month to test whether the sensitivity of the leakage protector is faulty.


    Does the household main switch need to have a leakage protector?

    The principle of the RCCB is: if all the sub-circuits in the home are equipped with RCCB, according to national regulations, the main switch does not need to be installed with RCCB.

    if the sub-circuits are not installed, or not all of them are installed, the main must install with RCCB.


    Is the household main switch installed with RCCB, or is it installed with RCCB for all sub-circuits?

    These two methods of installing RCCB have their own advantages and disadvantages. The biggest advantage of the method of installing RCCB is to save costs.

    It is safer and more convenient to install RCCB for all sub-circuits. It is recommended to add RCCB to all sub-circuits. Equipped with RCCB, the total switch does not need to be installed.

    The reason is simple: the installation of RCCB in all sub-circuits can effectively protect them and facilitate the management and maintenance of household power distribution.

    On the one hand, contact with the sub-circuit is more frequent, and the risk of leakage of the sub-circuit is greater.

    If RCCB is installed in the sub-circuit, protection will be activated once the circuit or electrical insulation is damaged and a short-circuit to ground occurs to prevent personal electric shock.

    On the other hand, household electrical circuits are generally divided into lighting circuits, power socket circuits, air conditioning circuits, etc.

    so that when one of the circuits fails, the other circuits can still supply power normally.

    It can be said to be a double guarantee, and it is easier to determine leakage the scope of the line, and troubleshooting.


    There was installed RCCB at home, will the leakage of electricity still happen?

    There is no RCCB can prevent faults/leakage from occurring 100%.

    The function of the RCCB is to cut off the loop power supply in time when a fault/leakage occurs, so as to avoid these faults/leakage causing personal hazards and property losses.

    In addition, if the RCCB itself has quality problems, even if the RCCB is installed, it may not be able to protect safety.

    To remind everyone, we must choose RCCB carefully to ensure the quality of the product.

    Be sure to pay attention to electricity safety!!

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