Schneider Electric offers three series of commonly used molded case circuit breakers (MCCBs): NSX, CVS, and EZD. Are you familiar with their differences and how to choose the appropriate one for your applications?

Here’s a brief introduction to each series:

• NSX Series: This represents Schneider Electric's high-end MCCB line, offering the best performance across all aspects. Naturally, it comes at the highest price point.

• CVS Series: Positioned as Schneider Electric’s mainstream series, the CVS offers performance that, while not as high as the NSX series, meets the requirements of the vast majority of applications at a more affordable price.

• EZD Series: Targeted at the lower end of the market, the EZD series is designed to meet the needs of users requiring fewer functionalities at the lowest price point.

When it comes to selecting the right series for your work, let’s consider some key parameters beyond price:

From the table, we can observe that the most significant differences between the three series lie in their ultimate breaking capacity and usability, which are also the primary factors affecting their prices. These differences serve as the most critical basis for choosing among the series.

The NSX Series is suitable for primary distribution where short-circuit currents are higher.

The CVS Series is ideal for secondary distribution with moderate short-circuit current levels.

The EZD Series is designed for terminal distribution.

In practice, the choice should be based on actual needs, adhering to the principle of “the right tool for the right job.” Of course, if the budget allows, opting for the NSX series is an excellent choice.