18
Before putting the unit into operation, check terminals and screw connections for tight
fit and put back all pertaining covers.
Observe the following instructions to avoid damage to the frequency inverter / servo
drive as well as subsequent damage and injury to persons:
•
Install circuit braker between power supply and frequency inverter / servo drive so
that it is possible to switch the device off independently.
•
In the case of separate drives, switching between motor and frequency inverter /
servo drive is prohibited during operation as this may trigger the protection gear of
the device. If you cannot avoid switching, consult KEB regarding protective measures.
Connecting and disconnecting is permissible with multiple motor drives if at least 1
motor is running during the switch-over process. Dimension the frequency inverter /
servo drive to match the occurring starting currents.
•
If the motor is still running during a frequency inverter / servo drive restart (mains
on) -e.g. due to large gyrating masses – the RPM search or DC braking function
must be activated.
•
When switching between motor and frequency inverter / servo drive, the RPM search
function must be activated. The function may only be triggered after closing the
motor contactor.
•
Modified programming of the frequency inverter / servo drive (variation of works
setting), should be checked again before putting the device into operation.
!Misadjustments may cause unintentional drive performance!
•
Should malfunctions or defects regarding the frequency inverter / servo drive occur
despite observance of the instructions concerning connection and operation, these
may cause undefined operating statuses. Activation of software-supported protective
functions such as limit switch function, correct switching of a brake or correct reactions
to set value specifications is no longer guaranteed.
•
Securing a unit solely with software-supported functions does not suffice. It is impe-
rative to install external protective measures that are independent of the frequency
inverter / servo drive.
Inverters/servo drives may be set, dependent on type, to restart automatically following
a fault stoppage (e.g. Undervoltage Error), when the fault conditions clear. System
design must take this into account, if appropriate, and additional monitoring or protective
features added where necessary.
With applications requiring the frequency inverter / servo drive to be switched on and
off cyclically, maintain an off-time of at least 5 min. If you require shorter cycle times
please contact KEB.
The frequency inverters / servo drives are conditionally short-circuit proof (EN 50178).
After resetting the internal protection devices, the function as directed is guaranteed.
Exceptions:
•
If an earth-leakage fault or short-circuit often occurs at the output, this can lead to a
defect in the unit.
•
If a short-circuit occurs during regenerative operation (2nd or 4th quadrant, feedback
into the intermediate circuit), this can lead to a defect in the unit.
2.6 Operating
Instructions
Damage to property
and injury to
persons
Automatic
Restart
Conditionally
Short-Circuit
Proof
Cyclic activation
and deactivation
Содержание COMBIVERT Series
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