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This FAQ has been written for NEAL (North East Africa and Levant) region. If you are looking for information for another region, please select the correct country from the top-left dropdown in the page and 'Navigate to Browse FAQs' in the Support menu.

what are the possible wiring and connections for MCCB NSX DC ?

     a-     The Compact NSX enables series connection of poles, thereby optimizing breaking capacity for high voltages.

 

Series connection reduces the voltage across the terminals of each pole (the total voltage is divided by two, three or four depending on the circuit breaker) and the operation of all poles provides the breaking capacity of the overall device.

 

This makes it possible to break short-circuit currents at high voltages while optimizing solutions (e.g. a Compact NSX 100 kA 250 V per pole can be used on a 750 V system with three poles connected in series, thus reducing the cost compared to a 750 V solution.

 

b-    The Compact NSX range enables parallel connection of the poles, thereby optimizing the use of the rated currents


you will find attached the wiring schemes for both connections (series and parallel)