Abstract: A system is provided for enabling the communication between a handheld device 26 and a circuit breaker (18a, 18b, 18c). The system comprises an electronic circuit breaker (18a, 18b, 18c) including an RFID component (54) having an RFID module (56) for storing data and a microcontroller (50) connected to the RFID module (56) and controlling the operation of the breaker (18a, 18b, 18c) in accordance with the data; and a handheld device (26) for communicating with the electronic circuit breaker (18a, 18b, 18c), the handheld device (26) including a microcontroller (50) controlling the operation of the handheld device (26) and a communicating component (82, 86) connected to the microcontroller (80) communicating wirelessly with the electronic circuit breaker (18a, 18b, 18c).

Abstract: A linear pre-regulator for cascading with a switching regulator for providing a load current for a circuit or personnel protection device includes a transistor for providing a series variable resistance when a load current changes. The series variable resistance includes a control node, and a control part maintains a substantially fixed voltage at the control node when the current drawn by the switching regulator changes. A storage part may be included to provide a voltage at a drain of a transistor forming the series variable resistance during an OFF-to-ON transition of the transistor.