1. 
   instantaneous non-tripping current
   the value of current below which the circuit-breaker will not operate automatically without intentional time-delay
   Found op http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=442-05-56
   
   
2. 
   instantaneous tripping current
   the value of current above which the circuit-breaker will operate automatically without intentional time-delay
   Found op http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=442-05-46
   
   

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