13.3.6. Process of an evacuation travel:
The elevator controller must be capable of performing an evacuation operation in case of a power
failure. The following operations must be carried out respectively by the elevator control system:
● Control detects mains failure.
● Control recognizes inverter fault.
● Control waits a certain time for the mains power to restore or for a generator to go online.
● Control disconnects the mains supply from inverter by releasing the KSAK contactor.
● Control activates the KKAK contactor after a certain time (t1: minimum 2s):
▪ This connects the back-up power supply to the input terminals L1 and L3.
▪ This activates the input terminal CI1. Inverter goes into an evacuation operation mode and
inverter fault is cleared.
● Control recognizes that the inverter is ready (no fault).
● Control activates the drive ENABLE signal (input terminal EN) by activating the main
contactors (KPA and KPB).
● Control applies the speed and direction command to the inverter.
▪ If the parameter “12.2-DIRECTION” is set as “BD: EASIEST DIR”:
◦ Inverter ignores the applied speed and direction commands and starts running the
motor in the optimum direction (easy direction) with a maximum speed limited with V4
speed.
▪ If the parameter “12.2-DIRECTION” is set as “BD: COMMAND DIR”:
◦ Inverter ignores only the applied speed command and starts running the motor in the
direction applied with a maximum speed limited with V4 speed.
● Control deactivates the evacuation operation after the trip is completed with the following
sequence:
▪ Control releases the KKAK contactor:
◦ This disconnects the back-up power supply from the inverter.
◦ This deactivates the input terminal CI1. Inverter goes into a normal operation mode.
▪ Control reconnects the mains power to the inverter by activating the KSAK contactor after
a certain time (t2: minimum 1s).
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