Abstract: A system for operating a circuit breaker is disclosed. The system includes a shunt coil configured to trip a circuit breaker. A first voltage source is configured to produce a first voltage and second voltage source configured to produce a second voltage. A voltage selection circuit configured to select one of the first and second voltage sources. A shunt drive circuit configured to drive an actuation voltage to the shunt coil based on a selected one of the first and second voltages.

Abstract: A power distribution panel can include a main line rigid busbar, a first breaker having a first base and a first line input terminal at a first input connection height from the first base, a first mounting bracket configured to dispose the first breaker in a compartment with the first line input terminal at a connection depth within the compartment, and an input line rigid busbar electrically coupled between the first line input terminal and the main line rigid busbar. The input line rigid busbar can be configured to be selectively coupled between a second line input terminal of a second breaker and the main line rigid busbar, and the second breaker can have a second base and the second line input terminal can be at a second input connection height from the second base, the second input connection height being different from the first input connection height.

Abstract: A roll of web-shaped material with a hollow roll core on which the web-shaped material is wound includes a signal-generating arrangement for generating an acoustical signal when the roll is rotated on a shaft as the web-shaped material is unwound therefrom and the signal-generating arrangement is part of the roll core.