KEB COMBIVERT Betriebsanleitung Seite 30

Safety and Application Instructions
Protect
against
Accidental
Contact
Note
Capacitor
Discharge
Time
Control lines
Voltage
with respect
to ground
Only Fixed
Connection
Voltage
Peaks
Insulation
Measurement
Different
Earth -
Potentials
GB - 30
Inverters / servo drives must be protected against physical damage during
transport, installation and use. Especially, no components may be bent or isolating
distances altered in the course of transportation or handling. The units contain
electrostatically endangered components which can be destroyed by
inappropriate handling. For that reason the contact of electronic components
and contacts must be avoided. The equipment must not be switched on if it is
damaged as it may no longer comply with mandatory standards.
Make sure that during installation there is enough minimum clearance and enough
cooling. Climatic conditions must be observed in accordance with EN
50178.
Electric Connection
Before any installation and connection work, the system must be switched off
and secured.
After clearing the intermediate circuit capacitors are still charged with high voltage
for a short period of time. The unit can be worked on again, after it has been
switched off for 5 minutes.
With frequency inverters that are not isolated from the supply circuit (EN 0100)
all control lines must be included in other protective measures (e.g. double
insulation or shielded, earthed and insulated).
Connection of the frequency inverter / power controller is only permissible on
symmetrical networks with a maximum line voltage (L1, L2, L3) with respect to
earth (N/PE) of 300V. An isolating transformer must be used for supply networks
which exceed this value! The units may be damaged if this is not observed.
The frequency inverters are designed for fixed connection only as discharge
currents of > 3.5 mA may occur especially when using filters. It is necessary to
lay a protective conductor with a section of at least 10 mm2 copper or a second
conductor electrically parallel to the protective conductor via separate terminals.
Ground point-to-point with the shortest connection possible to mains earth (avoid
earth loops).
When using IGBT inverters, high voltage peaks may arise in the motor due to
the switching action of the inverter output devices. These voltage peaks may
damage the insulation of the motor winding and must be taken into account
when using motor cables longer than 15m with high frequency motors. In this
case, the motor can be protected with a motor choke, dv/dt filter or sine filter.
When doing an insulation measurement in accordance with VDE 0100 / Part
620, the power semiconductor of the unit and existing radio interference filters
must be disconnected because of the danger of destruction. This is permissible
in compliance with the standard, since all inverters are given a high voltage test
in the end control at KEB in accordance with VDE 0160 (EN 50178).
When using components without isolated inputs / outputs, it is necessary that
equipotential bonding exists between the components to be connected (e.g.
through the equalizer). Disregard can cause destruction of the components by
the equalizing currents.