Abstract: A Medium Voltage Circuit Breaker that has at least a pair of contact mutually coupleable and uncoupleable to carry out an opening/closing operation, a magnetic actuator operatively connected to at least one of the contacts, and a capacitor bank that has one or more capacitors that deliver power to the magnetic actuator for carrying out the opening/closing operation and a control device. The Medium Voltage Circuit Breaker further has a supervisor device of the capacitor bank which measures the Equivalent Series Resistance and/or the Capacitance of the capacitor bank system.

Abstract: A medium or high voltage power distribution cubicle comprising: one or more primary equipment devices aimed at performing one or more primary functions (e.g. breaking, conducting the nominal current, withstanding the short circuit current, disconnecting, earthing, isolating live part from operators); one or more secondary equipment devices aimed at performing secondary functions (e.g. protection, interlock, supervision, control, measure, metering); and at least a first intelligent electronic device which is operatively communicating with said one or more secondary equipment device by a digital communication bus which is coupled to an associated first digital connector.

Abstract: A Medium Voltage Circuit Breaker that has at least a pair of contact mutually coupleable and uncoupleable to carry out an opening/closing operation, a magnetic actuator operatively connected to at least one of the contacts, and a capacitor bank that has one or more capacitors that deliver power to the magnetic actuator for carrying out the opening/closing operation and a control device. The Medium Voltage Circuit Breaker further has a supervisor device of the capacitor bank which measures the Equivalent Series Resistance and/or the Capacitance of the capacitor bank system.