Control And Operation - Watt Drive L2000 Series Manual

CAUTION Remarks for using earth leakage circuit breakers in the mains supply:
Frequency inverters with CE-filters (RFI-filter) and screened motor cables have
a higher leakage current against earth. Especially in the moment of switching
this can cause unintentional triggering of earth leakage circuit breakers.
Because of the rectifier on the input side of the inverter there is the possibility
to stall the switch-off function through amounts of DC current. For these
reasons, the following items should be observed:
Only pulse current sensitive earth leakage circuit breakers which have a short
term delay and a higher trigger current (500mA) should be used. Other
components should be secured with separate earth leakage circuit breakers.
Earth leakage circuit breakers in front of an inverter´s rectifier are not an
absolute protection against direct touching.
CAUTION Each phase of the power supply has to be provided with a fuse. Otherwise,
there is a danger of fire.

Control and operation

WARNING Be sure to turn on the input power supply only after closing the front case.
While being energized, don´t open the front case. Otherwise, there is a
danger of electric shock.
WARNING Never operate the switches with wet hands. Otherwise, there is a danger of
electric shock.
WARNING If the retry mode is selected, the inverter may suddenly restart during a stop
which was caused by a trip. In such a case, be sure not to approach the
machine. Provisions have to be taken that the driven motor or machine does
not endanger personnel even in the case of a sudden restart. Otherwise,
there is a danger of injury.
WARNING Even if the power supply is cut off for a short period of time, the inverter may
restart operation after the power supply has recovered if the operation
command is given. If this may incur danger to personnel, provisions have to
be made in order to prevent a restart after power recovery. Otherwise, there
is a danger of injury.
WARNING The STOP key is effective only if the corresponding parameters have been
set. Otherwise, there is a danger of injury.
WARNING If a reset is carried out following a trip condition the motor will restart if the
operation command has been given. Be sure to acknowledge this trip
condition with a reset only after confirming that no operation command is
active. Otherwise, there is a danger of injury.
WARNING When the power to the inverter is turned on while the operation command
is active the motor starts immediately. So before turning power supply on be
sure to confirm that no operation command is active.
WARNING If the inverter has been configured for the stop command not to be given
using the STOP key, pressing the STOP key does not stop the motor. In
this case a separate emergency stop switch is necessary.
CAUTION Operate the motor and machine connected to the inverter only within the
manufacturer´s speed specifications. Otherwise, there is a danger of injury.
CAUTION If a motor is to be operated at a frequency higher than the standard setting
value of 50 or 60Hz, be sure to check the allowable speed of the motor and
the machine with each manufacturer, and operate them only after getting
their consent.
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Safety precautions