A user can use a portable electronic device (110) to read destination information at a starting location (202). The portable electronic device (110) can be, for example, a smartphone (900). The destination information can be read from a tag (120) located a...

An energy management system (1) for an elevator installation (2) coupled to a source of alternative energy (4) integrates various operational modes regarding optimization of energy usage. The energy management system (1) selectively executes these modes de...

The present invention provides an uninterruptible power supply (10) wherein the isolation means (14') is automatically tested during normal operation to ensure that it is capable of effectively isolating the input from an auxiliary power supply (16) during...

The circuit has voltage-limiting elements, one of which is connected in parallel with each of combinations of energy storage elements. Two voltage-limiting elements are connected in parallel with two energy storage elements connected to two potentials, res...