Abstract: The invention discloses a wear monitoring system for a brake device of a motor. The brake device includes a brake disc and a brake magnet movable relative to the brake disc. The wear monitoring system includes a first arm portion including a first free end and arranged to be moved with the brake magnet so that the first free end always contacts the bottom of the brake magnet, a second arm portion arranged to be moved with the first arm portion and including a second free end; and a trigger device including a trigger button that is triggered by the second free end of the second arm portion when the wear amount of the brake magnet reaches a first threshold or a multiple of the first threshold and when the brake magnet and the brake disc are in an attracted state. A motor and an elevator are also disclosed.

Abstract: The present disclosure relates to a power switch device for an oiler of an escalator or a moving walk. The power switch device includes: a power input port, including a first power input terminal and a second power input terminal; a power output port, including a first power output terminal and a second power output terminal, the second power input terminal being connected to the second power output terminal, and a first circuit branch and a second circuit branch connected in parallel being connected between the first power input terminal and the first power output terminal; an electronically controlled on-off apparatus, connected in the first circuit branch; a manual switch, connected in the second circuit branch; and a state indicator, used to indicate a switching state of the manual switch.

Abstract: The present disclosure relates to a power switch device for an oiler of an escalator or a moving walk. The power switch device includes: a power input port, including a first power input terminal and a second power input terminal; a power output port, including a first power output terminal and a second power output terminal, the second power input terminal being connected to the second power output terminal, and a first circuit branch and a second circuit branch connected in parallel being connected between the first power input terminal and the first power output terminal; an electronically controlled on-off apparatus, connected in the first circuit branch; a manual switch, connected in the second circuit branch; and a state indicator, used to indicate a switching state of the manual switch.