... of SEMKO1. Description JEW1-2000: current rating 400A to 2000A, breaking capability 50KA 690V, 80KA 400V, for standard applications ... with low short-circuit levels JEW1-4000: current rating 2000A to 4000A, breaking capability 80KA 690V, 100KA 400V, ... on site. 3. ApplicationWith intelligentized and selective protection functions, JEW1-2000A Draw out Circuit Breaker , is used : 0) in ...