7 Commissioning
SMA Solar Technology AG
Operating manual
93
SI44M-80H-13-BE-en-15
Procedure:
1. Select
Generator > Generator
.
2. Set the parameter
Rated generator current
to the desired value. Tip: A suitable value for the
Rated generator
current
is 80% of the maximum generator current per line conductor.
7.8.1.2
Changing the Voltage Thresholds for the Generator
Relevant for off-grid systems
The voltage thresholds determine the range within which the generator voltage is allowed to fluctuate. When the
Sunny Island switches to the generator, the stand-alone grid will also fluctuate within this range.
A breach of the set voltage thresholds leads to disconnection of the line conductor from the stand-alone grid or the
generator not being switched on.
Procedure:
1. Select
Generator > Generator > Voltage monitoring
.
2. Set the parameter
Voltage monit. gener. lower minimum threshold
to the minimum generator voltage.
3. Set the parameter
Voltage monit. gener. upper maximum threshold
to the maximum generator voltage.
7.8.1.3
Changing the Frequency Thresholds of the Generator Voltage
Relevant for off-grid systems
The frequency thresholds determine the range within which the frequency of the generator voltage is allowed to
fluctuate. When the Sunny Island switches to the generator, the stand-alone grid will also fluctuate within this range.
A breach of the set frequency thresholds leads to disconnection of the line conductor from the stand-alone grid or to
the generator not being switched on.
Procedure:
1. Select
Generator > Generator
.
2. Set the parameter
Generator nominal frequency
to the rated frequency of the generator voltage.
3. Select
Generator > Generator > Frequency monitoring
.
4. Set the parameter
Frequency monit. generator lower minimum threshold
to the minimum frequency of the
generator voltage.
5. Set the parameter
Frequency monit. generator without max. threshold
to the maximum frequency of the
generator voltage.
7.8.1.4
Changing the Permitted Reverse Power in the Generator
Relevant for off-grid systems
