Question

Do all MCBs have same current limit?Give reasons​

Answer 1

Answer:

Miniature circuit-breakers

Miniature circuit-breakers are only used at LV, mainly in domestic or light-industrial or commercial applications. In general they are used in the same applications as semi-enclosed or cartridge fuses and offer an alternative for protecting radial or ring circuits. They are usually only single-phase devices and have a typical rated load current range of up to 100 A with a maximum short-circuit rating of 16kA at 240 V. Manually operated over-centre spring-operating mechanisms are used. Miniature circuit-breakers usually employ a series overload coil for rapid short-circuit tripping and a bimetallic element for tripping on