12.2
Evacuation with UPS
Due to the low power requirements of a synchronous drive, it is possible to carry out an evacuation trip
at half-load or in the direction of the pulling load using a commercially available UPS. An evacuation
trip against the load direction is not possible!
Due to the high level of magnetization current, emergency evacuation with a single-phase mains
supply with asynchronous motors does not make sense.
In case of a mains failure, the UPS supplies the following voltage:
•
230 VAC to feed L1 and L2
During each trip, the frequency inverter analyses the load ratio between the car and the counter-
weight. In case of a voltage drop (mains failure), the frequency inverter informs the control system
which direction is possible for an evacuation trip. The open loop control carries out the evacuation trip
in the corresponding direction.
The control system starts the evacuation trip by activating:
•
Controller enable
•
Direction preset (in the direction of the pulling load)
•
Speed default
12.2.1
Evacuation through UPS with optimum power
Information - Characteristics of evacuation with optimum UPS power
•
Load-independent starts
•
Load-independent stopping
•
Flush stopping
•
With corresponding sizing of the UPS, a trip in the motoric direction is also feasible.
Calculation of the UPS
The required UPS performance consists of the following:
Electronic frequency inverter power consumption
+ Control systempower consumption
+ Electromechanical brakes power consumption
+ Other consumers (car light,
…
) power consumption
+ Motor power consumption for UPS operation with suf
fi
cient power (ask
motor manufacturer)
=
Real power UPS [W]
Information
The shaft ef
fi
ciency has a decisive in
fl
uence on the required power of the UPS performance.
Original operating instructions
ZETADYN 3C
Emergency evacuation
R-TBA08_03-GB 1619
Part.-No. 00163322-GB
126/204
