OMD10078 rev F
11
Picture 8 – Overload with bypass not available
2) BYPASS NOT AVAILABLE
As soon as an overload is
detected the algorithm starts
to calculate the increment of
the energy.
When the threshold value is
reached the inverter is
switched off to avoid severe
damages to the
components.
As soon as the bypass is
available again the load is
supplied by the static
bypass switch.
After
30 minutes the
inverter is switched on again
and the load is transferred
again to the primary supply.
WARNING: this operation
causes the loss of the
supply to the load
1.2.3 Short-circuit operation
As soon as an output short-circuit is detected (alarm A25), the load is transferred
immediately to the emergency line that provides to eliminate the fault thanks to its
higher short-circuit current.
In case the bypass is not available, the inverter reduces its output voltage and limits
its current to 200% for 100ms, and then to 125% for 5 seconds, after that it is switched
off (according to EN 62040-3 / EN 50091-3).
Picture 9 – Short-circuit characteristic (Bypass not available)
