Differences Between EN 60898-1 & EN 60947-2 Circuit Breaker Certification Standards

2023-08-25


● Both EN 60898-1 and EN 60947-2 certification standards are standards that specify the requirements of low-voltage circuit breakers. So what's the difference between them?


Household Electricity & Industrial Electricity

 

EN 60947-2 standard manages circuit breakers (CB) for industrial applications to protect the distribution of 1000VAC and 1500VDC, and rated current from 0.5A to 6,300A. Utilities and manufacturing facilities commonly use air circuit breakers (ACB), molded case circuit breaker (MCCB) and miniature circuit breaker (MCB).


EN 60898-1 standard relates to AC low-voltage circuit breakers for household and similar applications, also known as miniature circuit breaker (MCB), such as family, school, store, and office power distribution. The standard specifies the maximum rated current is 125A, maximum rated short-circuit breaking capacity is 25kA.


The rated voltage required for industrial use circuit breaker is 400V, 440V, 690V or higher, up to 1000V. These figures are compared to the ordinary value of the residential MCB of 230V / 400V. The reference ambient temperature of the home is 30℃. The same is true for the impact withstand voltage (Uimp). For industrial circuit breakers, the ordinary value of Uimp is 6kV or 8kV, which is consistent with the position of the circuit breaker at the installation origin.


Can EN 60898-1 be used instead of EN 60947-2


No. Using residential CB instead of industrial CB, the consequences can be serious. MCB designed for indoor level II pollution conditions is not suitable for harsh outdoor level III applications. As for tripping characteristics: EN 60898-1 clearly describes the ratio of B, C, D curves to rated current, while in EN 60947-2 the instantaneous release can be adjusted for user needs or predefined by the manufacturer with a tolerance of ±20%. This is why the manufacturer additionally provides a wide range of different curves: K, Z, MA.


Usually EN 60898-1 certified circuit breakers meet the required performance to provide proper protection for household devices: pollution II, pulse voltage 4kV, isolation voltage identical to the nominal voltage 400V. Furthermore, the requirements of the standard apply to non-technical users, which is why the limited technical information is printed in detail on the CB.


Where should the EN 60898-1 certified circuit breakers be used?



These certified CBs are suitable for household use and in non-pollution and non-humidty conditions: home or similar devices, where unskilled users are unlikely to maintain overcurrent protection. In other words, in the final power distribution cabinet of a building with a nominal current not exceeding 125A. Usually, these circuit breakers are sold by electrical retailers. They are easy to install, safe and easy to use, even after years without maintenance.


EN 60898-1