SMA SUNNY ISLAND 5048-US, Техническое описание

Страница: 126 / 228

Connecting External Sources SMA America, LLC
126 SI5048U-TUS121440 Technical Description
14.1.10 Stopping the Sunny Island
If the Sunny Island is stopped by the user, the generator is immediately disconnected. The generator
is then stopped (generator request, GnReq, is disabled). The shut-off delay phase (Cool) is skipped
and the system enters the stop time.
14.1.11 Faults
Reverse Power
If the reverse power (”234.13 GnRvPwr” parameter) set for the ”234.14 GnRvTm” time is exceeded,
the generator is disconnected and stopped. The shut-off delay time (Cool, parameter
”234.10 GnCoolTm”) is skipped and the system enters the minimum stop time (Lock). After reverse
power, connection is blocked for at least ”231.03 ExtLkTm” or ”234.09 GnStpTmMin”.
Generator Failure
If a generator failure is detected (failure on the master phase), the generator is disconnected
immediately and a stop signal occurs on the generator. The system enters the minimum stop time
(Lock).
Generator Phase Failure
The failure of a phase (e.g. broken fuse) on a slave device is treated as a phase failure. The slave
device then disconnects this phase. If the phase is detected as being available again, it is reconnected
after the warm-up time ”234.12 GnWarmTm” has elapsed.
The phase failure on the master device is treated as a generator failure (see above).
Slave Device Failure
You can influence the behavior of the cluster upon failure of a slave device. For further information
see section 12.8 ”Reaction in Case of Faults in a 3-phase system” (page 104).
Generators with a Manual Start Option
Generators with the ”manual” start option can generally only be started and stopped at
the generator.
Generator Start Prevented
If the generator start is to be disabled after a manual stop, this must be performed by setting
the ”235.01 GnAutoEna” parameter to ”Off”.
If the generator is started directly at the generator management box or the generator, it
can only be stopped there again. Stopping the Sunny Island only disconnects the
generator and the system enters the stop time (Lock).
Reverse Power
Observe the reverse power which the Sunny Island can generate. The generator must
provide this protection, observe the indications of the generator manufacturers regarding
this!