9 Description of Functions and Schemes
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323
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9.13 Automatic Emergency Evacuation Scheme at Power Failure
1 Background
Passengers may be trapped in the car if power failure happens during use of the
solve the problem.
2 Overview
Scheme 1: UPS standby power supply (220 V)
In this scheme, the 220 V UPS provides power supply to the motor and the drive
control circuit.
Scheme 2: Automatic rescue device (ARD) for elevator emergency evacuation
In this scheme, the ARD provides power supply to the motor and the drive control
circuit.
manual for the ARD. This part describes only Monarch elevator ARD.
Automatic
Emergency
Evacuation
Scheme
Principle
Emergency
evacuation by
controller drive
After the mains power supply shuts down, the standby power supply is
used to provide power to the system. The controller drives the motor,
which runs the car to the leveling area to let passengers out.
Emergency
evacuation by
shorting stator
braking
After the mains power supply shuts down, the standby power supply is
used to provide power to the system. The controller shorts the motor
stator and releases the brake, making the car move slowly under the
to the leveling area to let passengers out.
There are two standby power supply modes in the industry.
Standby Power
Supply
Description
Emergency
evacuation by
controller drive
The (UPS) is used.
The UPS RUN contactor and UPS control circuit must added in the
control cabinet.
Automatic rescue
device (ARD)
for elevator
emergency
evacuation
The battery is used as the standby power supply. Only the input terminal
for emergency evacuation signal feedback must be reserved in the
control cabinet. There is no other cost.
The ARD itself has the control system which can diagnose the mains
power supply status and performs emergency evacuation running.
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