Demonstrator apparatus utilizes a display to portray in log-log coordinate scale the trip-time curve of a solid state (static) trip circuit breaker. A simulated static trip unit programmer is selectively adjustable to vary the shape and position of the displayed trip-time curve. An overlay bearing the...http://www.google.es/patents/US4245318?utm_source=gb-gplus-sharePatente US4245318 - Circuit breaker demonstrator and distribution circuit protection coordinator apparatus
Circuit breaker demonstrator and distribution circuit protection coordinator ...
