Changing The Automatic Frequency Synchronization In Off-Grid Systems; Multifunction Relay; Setting The Time Control; Setting The Functions Of The Multifunction Relays - SMA SUNNY ISLAND 4.4M Operating Manual

7 Commissioning
10. Connect the BatCur– insulated measuring conductor on the side
for connecting the battery.
11. Close the battery fuse load-break switch quickly and switch on the inverter.
7.9.2

Changing the Automatic Frequency Synchronization in Off-Grid Systems

Relevant for off-grid systems
Automatic frequency synchronization enables the use of clocks which use the power frequency as a timer. The power
frequency determines the accuracy of the clock. For power frequencies with constant frequency deviations from the
rated frequency, the time indications will become more and more inaccurate. Continuous frequency deviations occur in
off-grid systems with generators, for example. If the automatic frequency synchronization is activated, the Sunny Island
regulates the frequency deviations over time. As a result, the accuracy of clocks that use the power frequency as timers
is increased.
The basic procedure for changing operating parameters is explained in another section (see Section 8.6, page 113).
Procedure:
1. Select AC Side > Operation.
2. To deactivate automatic frequency synchronization, set the parameter Automatic frequency control to
Disable.
3. To activate automatic frequency synchronization, set the parameter Automatic frequency control to Enable.
7.10

Multifunction Relay

7.10.1 Setting the Time Control

The time control controls up to 2 multifunction relays according to the set times.
The basic procedure for changing operating parameters is explained in another section (see Section 8.6, page 113).
Procedure:
1. Select Device > Multifunction relay > Timer.
2. Select the parameter Start date of relay control for timer.
3. Set start time for timer 1 and start time for timer 2 (both start times with date and time).
4. Select the parameter Duration for which multifunction relay is activated for timer.
5. Set runtime for timer 1 and timer 2.
6. Select the Repetition cycle time relay control for timer parameter
7. Set repetition cycle time for timer 1 and timer 2:

7.10.2 Setting the Functions of the Multifunction Relays

The multifunction relays of the master are preset in a single-cluster system for increased self-consumption and cannot be
changed. In multicluster systems with Multicluster-Box 12 (MC-BOX-12.3-20), multifunction relays 1 and 2 in the
master of the main cluster and multifunction relay 1 in slave 1 of the main cluster are set permanently. Furthermore, free
multifunctional relays can be used for additional functions.
102 SI44M-80H-13-BE-en-15
SMA Solar Technology AG
BatCur +
BatCur −
Battery
Battery fuse
Operating manual