Schneider Electric Compact NSX moulded case circuit breakers with extended capacity

Schneider Electric has released an extended breaking capacity for its complete range of Compact NSX moulded case circuit breakers (MCCB), suitable for low-voltage applications spanning 100 to 630 A. Engineered to provide good protection and service continuity for high-demand power applications, the range now offers breaking capacity of 100 kA at 690 V and 200 kA at 440 V.

The circuit breakers are suitable for the marine, oil and gas, and other natural resource extraction and processing industries that require circuit breakers that will reliably protect against extreme short-circuit faults in systems running paralleled power sources or large numbers of motor loads. The range provides the extended breaking capacity required to enhance the level of safety in low-voltage systems running at up to 400/480 V, as well as the higher-efficiency 690 V power systems that are becoming increasingly common.

With an ability to withstand extreme fault conditions and remain operational after three faults, combined with remote control reclosing functionality that can help restore a circuit quickly, the range is a reliable and cost-effective alternative to high-power fuses over the long term. The circuit breakers also provide the discrimination and coordination necessary to maximise continuity by isolating faults and avoiding system-wide outages. The products also continue to offer embedded intelligence features such as energy metering, alarms, diagnosis and communication to help maximise energy efficiency and network reliability.

The MCCB can be supplied as part of a complete, fully integrated 690 V power distribution solution that also includes Masterpact air circuit breakers (ACB) and Okken switchboards.