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Elevator emergency automatic rescue device (also known as ARD) is a special device installed in an elevator which is only used during an event of a power failure or blackout in a building. An elevator emergency landing device is useful for preventing passengers from becoming trapped inside an elevator during a power failure. All newly-installed elevators must have elevator emergency automatic rescue device implemented before an elevator examination can pass. However, some countries may not require this device.

How it works

Please refer to Emergency power operation (EPR).

Upon power failure, an elevator equipped with this device automatically moves and stops at the nearest floor using a rechargeable battery (or uninterruptible power supply also known as a UPS), and the doors will then open to ensure any onboard passengers' safety[1][2].

Notable devices

Devices in Mitsubishi elevators

There are two types of emergency landing devices equipped in Mitsubishi elevators; Operation by Emergency Power Source (OEPS) and Mitsubishi Emergency Landing Device (MELD).

Operation by Emergency Power Source (OEPS)

With OEPS, the elevators operate using an emergency power source during a power failure in order to prevent passengers from being trapped inside the elevator cars. When the power is restored, the elevators will resume normal operation.

With supervision panel

  • OEPS SW and Return / Cont. SW are provided with Supervisory Panel.
  • Return Floor is a floor designated by each customer in advance, or the nearest floor.
  • OEPS SW shall remain set to AUTO position under normal conditions. If some cars do not automatically travel to Return Floor due to some abnormality, then switch should be set to MANUAL and the elevator should be operated manually.

Without supervision panel

Return Floor is defined as the floor designated in advance by each customer, or the nearest floor.

MELD - Mitsubishi Emergency Landing Device

Main article: Mitsubishi Emergency Landing Device (MELD)

Gallery

Notes and references

Elevator 

Drive systems: Traction • Winding Drum • Hydraulic


Types of elevators: Double DeckDumbwaiterFireman'sFreightIncline • PassengerResidentialWheelchair lift


Concept: CapacityDestination dispatchElevator algorithm • Elevator control systemElevator machine room • Elevator maintenance • Elevator monitoring systemElevator modernizationACOP & UCMPMachine room less elevatorMajor alterationsRated speed


Elevator systems, controllers and equipments: Elevator emergency automatic rescue device • Elevator fixtures • Elevator keys • Elevator special modesElevator doorsDoor camDoor interlocks (Interlock wiring communication system) • Door restrictorElevator Inspection CertificateEmergency stop buttonFloor designatorsGate switch • Old Deadman controls • Overspeed governorMotor-generator set & Silicon-controlled rectifier (for DC-powered elevators) • Insulated-gate bipolar transistor (for AC-VVVF-powered elevators) • SelectorTape headRegenerative converter (for AC-VVVF-powered elevators)


See also: List of elevator fixtures guide • List of elevator and escalator companies • Elevator door sill guide (Non-proprietary elevator component door sill guide) • Floor numbering (Unlucky floor numbers) • Elevator incidents and accidents

This elevator only serves two floors. "This elevator only serves two floors."
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