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In this subsection, the user can set SP power thresholds or AB voltage at which the built-in relays are switched ON/OFF. Each relay is rated at 16A/220 V, i.e. For
the load below 3.5 kW.
Details of the relay operating at SP power excess.
The power excess means that SP can produce more power than is being drawn now. For example, if you have panels of 800W power in total (like an array of
2x2 and of 200W each) and only 200W are taken by the AB (by the load) during the maximum solar activity this means that power excess is 800-200=600W.
Controller calculates the available instant SP power depending on insolation and position of the Sun. This available power may not be used if AB are full or
the load is not enough. In this case relays help to use this energy.
Import
ant: in case of work according to SP power the relays by default operate according to their number. It means, that at the beginning, the
fi
rst relay
#1 will draw all the SP power excess according to menu presets. If more additional SP power is available the second relay will start operating within its
preset power limits. If we still have a power excess – 3rd relay will switch on.
As well any of the relays can be used not only for the load connection but in case of equipment failure (“Error”). In this case, the relay pins can be connected
to the security alarm systems to notify remotely about the problems occurred: for more details, see "Relay Settings".
It should also be considered that relay can be programmed for both direct and inverse starting.
It means the following:
а
) When the turn-on voltage is set to be higher than the turn-o
ff
voltage, the relay trips (starts consuming a current) at the current voltage higher than the
turn-on voltage, but switches o
ff
(stops consuming a current) when the current voltage is lower than the turn-o
ff
voltage.
b) When the turn-on voltage is set to be lower than the turn-o
ff
voltage, the relay trips (starts consuming a current) at the current voltage lower than the
turn-on voltage, but switches o
ff
(stops consuming a current) when the current voltage is higher than the turn-o
ff
voltage.
The choice of the relay switching mode (direct / inverse) allows to con
fi
gure the system optimally in terms of reducing the controller current consumption
during the absence of energy coming from SP.
9.1.
"AB voltage ON"
. The AB Voltage for the relay switching on.
Type of input – "Numeric".
9.2.
"AB voltage OFF".
The AB Voltage for the relay switching o
ff
.
Type of input – "Numeric".
9.3.
"SP1 power ON"
. The SP power excess for relay # 1 is switching on.
Type of input – "Numeric".
9.4.
"SP2 power ON "
. The SP power excess for relay # 2 is switching on.
Type of input – "Numeric".
9.5.
"SP3 power ON"
. The SP power excess for relay # 3 is switching on.
Type of input – "Numeric".
9.6.
“Eco mode”.
This mode is used when the relay is programmed to be switched on at power excess and for the cooperation of controller and MAC. While
operating without MAC, a relay is switched ON/OFF only at SP power excess/shortage.
9|
"THRESHOLD VOLTAGES"
