SMS TAKEDO-3VF, User Manual

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ANNEX NXP Release 7.1 dated 19-02-2018
10
6 – EMERGENCY OPERATION
TAKEDO-3VF NXP can work supplied by batteries, or by an UPS (uninterruptible power supply), or by any
off-grid power supply, to move the car and bring it to the floor in case of mains power supply failure.
NXP inverter performs the emergency operation whenever terminal 10 input of NXOPTA1 board is
activated.
By activating this input, the message CAR SPEED and RUN DIRECTION of the car (up/down – V1.3.1) is
displayed, in order to allow the operator – if any – to directly and effectively control the car movement.
This monitoring is crucial in CONSTANT PRESSURE PUSH-BUTTON emergency operation, that is when
the operation is carried out by the operator who MANUALLY controls the car movement (see Par. 6.5).
The emergency operation of the inverter is adjusted through GROUP 10 parameters (G2.10).
Emergency operation (Parameter P2.10.1) can be carried out as follows:
NOT USED no emergency operation is enabled.
MANUAL the car moves in the direction indicated by the command received by the inverter.
AUTOMATIC the inverter tries to drive the motor in both directions, then chooses the most favorable
direction.
TORQUE TEST the inverter, when the brake opens, checks the favorable torque direction and moves the
car in that direction (used in gearless systems).
BATTERY SAVE – FOR GEARLESS SYSTEMS ONLY
the inverter only monitors the car speed and if the latter exceeds the threshold set in
P2.10.10 the brake opens and then closes, bringing the car to the floor with an
“intermittent” motion.
However, if the car load/counterweight is balanced and the car speed is lower than the
level set in P2.10.11, after a certain period of time (P2.10.12) the brake closes, the TBM
short-circuit contactor is activated (this must always be installed in gearless systems with
synchronous motor), then the inverter power stage automatically switches on and the car
is brought to the floor at the speed set in P2.10.9.
We recommend you to set the parameter “Motor Control Emergency Operation” P2.10.11.1=“Frequency” for
ASYNCHRONOUS motors, whereas it is compulsory to set P2.10.11.1=”Closed Loop” for SYNCHRONOUS
motors.
6.1 – MINIMUM VOLTAGE AND POWER SUPPLY FOR EMERGENCY OPERATION
If the power supply voltage (inputs L1 and L2 – see the diagram in par. 6.2) is provided by batteries with a
voltage lower than 200V, it is necessary to use the optional board
NXEM1 (supplied and connected by SMS),
that shall be supplied with 230Vac – 50Hz (maximum power required 300mA).
The batteries minimum voltage is as follows:
48V for asynchronous motors with selection of the favorable run direction (“Automatic” emergency
operation)
96V for asynchronous motors with forced run in the desired direction (“Manual” emergency operation)
>96V for gearless synchronous motors the batteries minimum voltage is 96V, although in most cases this
voltage is not sufficient.
To make sure it works, it is necessary to ask the motor manufacturer what are the voltage and the
minimum current necessary for the motor to remain idle at the brake opening with rated load.
If the power supply voltage (inputs L1 and L2) is provided by a secondary power supply, 230/400Vac 50Hz
single phase or 3-phase, THE NXEM1 BOARD IS NOT NECESSARY.
The power that is to be taken from the secondary power supply depends solely on the power of the motor
installed. Generally, power between 20% and 40% of the motor power is enough.
To make sure it works, ask the motor manufacturer, as previously explained for the batteries.
The necessary power can be reduced by using the emergency mode “BATTERY SAVE”, thus accepting the
“intermittent” motion when the car is empty or at full load.