Compact NSX range can be used from 24V DC to 750V DC network, by taking into account the following points for its use on a 24V DC network:

The electrical performance is still kept .( breaking capacity , endurance operations ..)
Nevertheless, the influence of pollution due to the environment is very important on the contact's surface, which can drive to overheating. In some environments a deposit are accumulated giving a bad conduction of the contacts. (examples: salty surrounding, cement works, flour-milling industry, farm-produce industry). Those types of industry require an adapted maintenance of the circuit breakers working at 24 V DC. This means a periodic opening /closing of the circuit breaker at nominal current to clean the contacts by using the internal arcing. The cleaning will be effective if we have to deal with a self-induction installation. (more energy to maintain an internal arc)
We recommend a monthly open/close operation and even twice in a very aggressive environment.
In an environment containing Sulphur (vapors from diesel oil) the use of circuit breakers at 24 V DC is forbidden. The Sulphur causes fast oxidation of the silver contacts.

Released for: Schneider Electric Malaysia