When choosing the switch disconnector, the first thing to consider is the category of use, that is the application to which it's intended. For example, the table below lists: AC-21 Switching of resistive loads, including moderate overloads AC-22 Switching of mixed resistive and inductive loads, including moderate overloads AC-23 Switching of motor loads or other highly inductive [...]
The MCBs, that means Miniature Circuit Breaker, are automatic protections that cut the electric line for which they are installed in the event of overload or short circuit. ___________________________________________________ Other information on this topic Visit the website page dedicated to Miniature and residual circuit breakers.
The RCCBs, that means Residual Current Circuit Breaker, are automatic protections that cut the electric line on which they are installed in the event of a ground fault (current leakage to ground). They are protections against indirect contacts. ___________________________________________________ Other information on this topic Visit the website page dedicated to Miniature and residual circuit breakers.
This data, indicated in the manufacturer's technical tables, indicates the level of current protection offered by the RCDs. The sizes typically used in low voltage electrical distribution are 30mA and 300mA. Typically the 30mA threshold is dedicated to the protection of people. To explain the intervention thresholds, take the example of a 30mA RCD: this [...]
Yes. The MCB offers protection against overloads for currents in the range 1.13In ÷ 1.45In. Since the overload is typically borne by most equipment, the trip is not instantaneous. ‐ If there is a current of 1.13In, the switch must not trip before 60 minutes (In≤63A) or 120 minutes (In> 63A). ‐ If there is [...]
An MCB must protects against short circuits or sudden increases in the current absorbed by a load. The magnetic trip curves exactly define the protection behavior based on the amount of current to be interrupted. There are appliances (loads) that could give rise to untimely trips because when they start they have absorption peaks (eg. [...]