Changing The Voltage Thresholds For The Generator; Changing The Frequency Thresholds Of The Generator Voltage; Changing The Permitted Reverse Power In The Generator - SMA SUNNY ISLAND 4.4M Operating Manual

SMA Solar Technology AG
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.
The basic procedure for changing operating parameters is explained in another section (see Section 9.2 "Changing
Operating Parameters", page 119).
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.
The basic procedure for changing operating parameters is explained in another section (see Section 9.2 "Changing
Operating Parameters", page 119).
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
Operating Manual
7 Commissioning
SI44M-80H-12-BE-en-10 97