Square D KQ B 32 AMP MCB 240 v BS60898 10B132 A 10Ka CIRCUIT BREAKER

Product Information

Whoops, you don’t have access to that! Please register with the IET to join the community and access this area. As mentioned in the blog, MCB manufactured as per IEC 60898 to be used in residential buildings or similar applications. In industrial applications can be used breakers certified as per IEC 60947-2 or IEC 60947-2 and 60898 both.

I can say is that mix-ups of standards happen. The ideal way to avoid them is with tightly worded and highly enforced national regulations. And, for prescribers to specify what CBs will be used for and then confirm that the standard governs that usage.So a barefoot victim gets exposed to about 120V, and maybe we can have an argument about reduced CPC in twin and earth.

Two requirements that ensure reliability of circuit- breakers are the ultimate breaking capacity (I cu) and service breaking capacity (I cs). I cs is expressed as a percentage ratio of I cu and gives the maximum short-circuit current a cb can break three times and still function in normal service.The values of earth loop impedance shown in these tables must compensate for conductor temperature rise, if the measurement of loop impedance is taken at ambient temperature. A useful rule of thumb is to allow for a temperature rise from 20 degrees to 70 degrees by multiplying the listed value by 0.8. The measured value can then be compared to the compensated value.

Dear Sahad, it is normal having MCCB certified as per 947 in commercial/small commercial buildings with MCB’s certified as per 898. And it is wrong to use MCB’s dedicated for domestic applications (60898) in industrial applications installations. But it is not really a sudden step in risk between 230v and 231, more of a gentle rise in risk from quite safe at about 50V to really very bad for you by perhaps 1500V , from which 2 handy values have been converted into safe times for the table. It is convenient when the performance of a cb meets the requirements of both standards and is therefore suitable for residential, industrial and commercial installations. Yes. The rated voltage currently required in industrial use CBs is 400 V, 440 V, 690 volts, or higher values up to 1000 V. Compare those numbers to the usual value 230V/400 V for residential MCBs. Reference ambient temperature is 30°C for households. The same goes for impulse withstand voltage (Uimp), IEC 60898-1 requires 4kV, in line with the use for final circuits. Whereas for industrial circuit breakers, the usual values of Uimp are 6 or 8kV, in line with the position of the circuit breaker at the origin of the installation. Two standards that specify requirements for low-voltage circuit-breakers (cbs) have been causing confusion for some time among designers and installers of electrical installations. They are BS EN 60898-1 and BS EN 60947-2 and questions are often asked about the difference between them.Yes it is safe choice. iC60N 2P @230Vac during the trip has a double break effect (circuit is interrupting in 2 places, per each pole).