The S200 MCB is a leading product from the ABB System pro M range and incorporates standard short circuit capacities of 6kA, 10kA and 15-25kA. This latest announcement provides the complete range of trip curves, including B, C, D, K and Z, across all sizes and capacities.
According to the company, in applications where long cable runs need protection the B curve will provide a high level of protection.
The C curve is considered a general purpose protection curve for many light and power applications. For motor starting and transformer protection the D curve is often utilised due to the high inrush or start-up currents of this type of load.
The company can provide the K curve characteristic for motor starting and transformer loads.
In the short circuit range of the K curve the protection level is 10 to 15 times rated current which also matches the characteristics of most inductive loads more closely than a D curve MCB.
The addition of the Z curve MCB allows protection of semiconductor electronics due to the instantaneous trip values at 2 to 3 times rated current and the thermal characteristics of 1.05 to 1.2 times rated current.
Ian Richardson
Product Manager, Line Protection
ABB Australia
02 9255 3999