b) With UPS Supply:
A UPS having the power of 1/5
th
of the motor power should be sufficient. For example: A 1.1kW
UPS may be used for a 5.5kW motor.
The power that will be drawn from the UPS must be limited by “12.4-UPS POWER” parameter. If
power is not limited, the UPS may be overloaded.
If the UPS will also power other electrical loads during evacuation (i.e: control panel, mechanical
brakes, door operator, etc), the power required by those loads must also be considered on
calculation of the UPS power.
13.3.4. Evacuation Towards Command Direction:
This method must be used if evacuation is required to finish on a certain predetermined floor.
If “Evacuation Towards Command Direction” is required, “12.2-DIRECTION” parameter must be
set to “BD:COMMAND DIR.”. In that case, the driver will move the car towards the direction
commanded by the controller.
On “Evacuation Towards Commanded Direction”, movement direction is independent of the car-
load. The car is moved in the desired direction and is stopped exactly on floor level.
13.3.4.1. Back-up Power Requirement Calculations for Evacuation Towards
Lower-Load Direction:
On “Evacuation Towards Commanded Direction”, the worst case scenarios are when the
command is up with a fully-loaded car or when the command is down with an empty car.
Therefore, auxiliary power requirement calculations must be made considering these scenarios.
Using a low speed setting for evacuation, will reduce instantaneous power requirements but will
increase evacuation duration. Likewise, using a high speed setting will increase the instantaneous
power requirements while reducing the evacuation duration. Evacuation speed may be limited by
“12.3-BAT.Speed” parameter. The driver will not allow the car to exceed this speed limit even if
the system allows moving faster.
If the distances between floor levels are long, the evacuation time will be long which means the
power consumption will be higher. While calculating the back-up power requirements, this fact
must also be considered.
The voltage of the connected back-up power must be set in the parameter “12.1-BAT.VOLTAGE”.
a) With battery supply:
It is recommended to apply as 72VDC – 120VDC battery voltage. While determining the capacity
required for the batteries, a rule of thumb is, choosing the batteries such that battery capacity in
Ah’s will be at least 1/3
rd
of the motor current in A’s. For example; at least a 7Ah battery must be
used for a 21A motor.
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