Solare Datensysteme Solar-Log - Manual (Page 145)

145
Special functions
23�3�6 Remote-controlled fixed value cos (Phi) shift factor
only Solar-Log™ PM+)
This option allows the cos (Phi) shift factor to be remotely controlled by the grid operator. To enable this
function, a ripple control receiver or similar device is required. Typically, these devices are provided by the
grid operator for a fee.
The type of ripple control receiver or telecontrol technology used depends on the level of development of
the respective grid operator. The control signals emitted by the grid operator are converted to potential-
free signal contacts by the ripple control receiver and can be evaluated by the Solar-Log™ PM+ models via
the digital PM+ interface.
Note
The ripple control receiver's potential-free commands have to be present for the dura-
tion of the command. Command impulses cannot be processed.
Channel settings for power reduction section
The relay outputs for the ripple control receiver are connected to the PM+ input of the Solar-Log™. This
allows the grid operator's signals to be evaluated by the Solar-Log™.
Fig.: Schematic diagram of a ripple control receiver with four relays.
The relay for reactive power control is wired to the PM+ interface.
Note
The function of the PM+ interface is only possible when the contacts of the ripple control
receiver are potential free and are wired with a supply voltage of 5VDC from the PM+
interface.
In practice, various ripple control receivers with varying numbers of relays and different signal codes are
used. The configuration matrix for the Solar-Log™ PM+ thus offers maximum flexibility – most common