KEB Combivert R6 Instruction Manual page 9

Safety Instructions
Conditionally
Short-Circuit
Proof
(Regen)
Cyclic Turn On
and Turn Off
GFI (Ground
Fault Interrupt
Circuit-Breaker)
The R6 is conditionally short-circuit proof (EN 61800-5-1 / VDE 0160). After resetting the
internal protection devices, the function as directed is guaranteed.
Exception:
• A ground fault or short-circuit frequently occurring at the output, can lead to damage to
the unit.
With applications requiring the R6 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.
If personnel protection of the system against ground fault is required, the R6-N must be
protected according to EN 61800-5-1:
• 3-phase inverters (with B6 bridge-connected rectifi er) by RCMA's with separation (use
privileged) or RCD's type B (all-current sensitive GFI's)
The tripping current should be 300mA or more, in order to avoid a premature triggering by
leakage currents (about 200mA. Dependent on the load, the length of the motor cable and
the use of a radio interference fi lter, substantially higher leakage current can occur). The
connection instructions from the manufacturer and the valid local requirements must be
observed.
Dependent on the available supply type (TN, IT, TT) further protective measures are
necessary in accordance with VDE Part 410 4( Part 4; Chapter 41).
For example, with TN-mains this protection is made with over current protective devices,
with IT-mains it is insulation monitoring with a pulse-code measuring method. A protective
separation can be used with all mains forms as long as the required power and cable lengths
permit this.
The person setting up the unit must present proof of compatibility before installing the
converter!
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