On low-voltage breakers, the circuit-responsive opening means (such as overcurrent trip, etc.) are built into the breaker to ... Characteristic curves which cross must be avoided to provide selective tripping of breakers. With such a set of relays, anbsp;...
|Title||:||Electric systems for commercial buildings|
|Author||:||Institute of Electrical and Electronics Engineers. Subcommittee on Electric Systems for Commercial Buildings, American Institute of Electrical Engineers. Committee on Industrial Power Systems|