Lenze 8615E - Manual (Page 22)

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4.2 Electrical installation
•
The drive controllers are equipped with electrostatically
endangered components. The service and maintenance
personnel must be electrostatically discharged before working at
the units.
They can discharge by touching the PE fastening screw or
another earthed metallic surface in the control cabinet.
•
All control inputs and outputs of the inverter are mains-isolated.
The mains isolation has a basic insulation. The control inputs
and outputs must be integrated into another level of protection
against direct contact.
Use insulated operating elements, connect the mechanical
screwed joint of the set-value potentiometer to PE (assembly
kit).
•
Not used control inputs and outputs should be covered with
plugs or protective covers which are supplied together with the
unit.
•
When using current-operated protective units:
−
The controllers are equipped with an internal mains rectifier.
As result, a DC fault current may prevent the tripping of the
current-operated protective device after a short-circuit to
frame.
Therefore, additional measures as protective multiple
earthing or universal-current sensitive current-operated
e.l.c.b. are required.
−
When dimensioning the tripping current of current-operated
e.l.c.b. it must be observed that there are capacitive leakage
currents between cable screens and RFI filters during
operation. These currents may result in false tripping of the
current-operated e.l.c.b.
•
The regulation about the min. cross-section of PE cables must
be observed. The cross-section of the PE cable must be at least
as large as the cross-section of the power connections.
•
In the event of condensation, only connect the inverter to the
mains when visible moisture has evaporated.
•
Before switching on the inverter for the first time check whether
there is an earth fault at the output side, if this is the case, clear
the earth fault. Earth faults which occur during operation are
detected, the inverter is then switched off and the message
"OC1" is set.
•
Frequent mains switching may overload the internal switch-on
current limitation. For repeated mains connection, the inverter
must not switched more often than every 3 minutes.
•
Replace defective fuses only with the specified type and when
the device is disconnected from the mains. The inverter remains
live for up to 3 minutes after mains disconnection.