Elevator power distribution box voltage

Elevator power distribution boxes typically handle AC input voltages of 208V, 240V, 480V, or 600V and provide multiple DC and AC outputs such as 24V, 12V, 5V, and 110V for control and motor systems.AC Input VoltageElevator power distribution boxes are designed to accept standard AC mains voltages, commonly including 208V, 240V, 480V, and 600V, depending on the building and elevator system requirements . These voltages feed the main panelboard, which distributes power to the elevator's motor drives, control circuits, and auxiliary systems. The panelboards are rated for high fault currents, with short-circuit ratings up to 200 kAIC at 240V, 100 kAIC at 480V, and 65 kAIC at 600V .DC and Low-Voltage OutputsModern elevator systems use Switch Mode Power Supplies (SMPS) to convert AC input into multiple low-voltage DC outputs required by control electronics, sensors, and auxiliary devices. Typical output voltages include:DC 110V – often used for motor drives or inverter circuitsDC 24V – commonly used for control relays, sensors, and safety circuitsDC 12V and 5V – used for logic circuits, microcontrollers, and display panels-12V – sometimes used for analog or communication circuits5V Standby (5VSB) – provides power to control systems when the elevator is in standby mode Control and Safety VoltagesElevator control switches and supervisory circuits often operate at 120V AC or 24V DC, depending on the design. For example, Siemens Elevator Control Switches use 120V AC for control relays and provide monitoring for fire alarm integration and shunt-trip circuits . These voltages ensure safe operation and compliance with NFPA and UL standards.SummaryElevator power distribution boxes are engineered to handle high-voltage AC inputs and convert them into multiple DC and AC outputs to power motors, control systems, sensors, and standby circuits. Proper understanding of these voltage levels is essential for installation, maintenance, and troubleshooting, ensuring both safety and reliable elevator operation .