SMA Sunny Boy Control - Manual (Page 78)

Sunny Boy Control
SMA Technologie AG
User Manual SUNBC-14:NE0206 74
Switching Contact
The switching contact is used to control loads according to the current irradiation.
[ SWITCH RELAY ]
‡Power-switch Turning power management on/off
…deactivated
Pon… Š Power output required for the switching contact to switch on
…………3.50kW
Poff… Power output at which the switching contact switches off
…………2.00kW
Tolerance… How long Pon must be sustained before the contact switches on
………………15min
Minimum Time… Minimum timespan that the contact remains switched on
………………60min
----------------
Time-switch… Turning time management on/off
…deactivated
On-time… Switch-on time
………00:00
Off-time… Switch-off time
………00:00
----------------
Default Switch
…Contact 2_1 Choice between “Contact 2_1” and “Contact 2_2”
Fig. 6.13: Switching contact screen
The power management function allows you to switch a load on and off based on
the operating condition of the PV system. If the total system power can be sustained
at a level set under “Pon” for a period of time set under “Tolerance”, the load will
be switched on until the power drops to a level set under “Poff” for the period of
time set under “Tolerance”. In any case, the load will remain switched on at least
as long as set under “Minimum Time” (this may, for example, correspond to the
duration of a washing machine cycle).
Like a timer, the time management function “Time-switch” switches the load on at
a time set under “On-time” and off at a time set under “Off-time”.
If both the power management and the time management functions are activated,
priority will be given to the power management, and time management will occur
only if the power-managed event never occurred.