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Relay 2 on the PSC2000-3500 models will be activated only after the AC supply has become
available. In case of battery operation, Relay 2 will deactivate immediately. This can be used
to switch less critical AC loads (i.e. electric boiler, aircon) on and off that are allowed to be
supplied by the mains or generator only.
Using TBS Dashboard, it is also possible to configure the programmable relays to perform a
different task, like starting a generator when the battery voltage has reached a certain low
voltage level.
Both normally closed and normally open contacts of these relays are available. For the
PSC1600-1800 models, the maximum relay contact ratings are 30Vdc/1A or 60Vdc/0.3A. For
the PSC2000-3500 models, the maximum relay contact ratings are 30Vdc/16A or
250Vac/16A.
4.4 Trigger input
The trigger input offers a way of externally controlling the behaviour of the Powersine
Combi. The trigger input can be connected to an external switch or a potential free relay
contact. By closing this external switch or contact, a user programmable ‘action’ will be
performed. Such an action could for example be to release the AC transfer switch,
temporarily disable the AC input Power Boost feature or force the Powersine Combi to
switch to inverter mode. All this can be configured in TBS Dashboard. The PSC1600-1800
models are equipped with one trigger input, while the PSC2000-3500 models are equipped
with two trigger inputs.
4.5 Load requirements in inverter mode
Before you connect your appliance(s) to the Powersine Combi AC output, always check it's
maximum power consumption. Do not connect appliances to the AC output requiring more
than the nominal power rating of the inverter continuously. Unless these appliances are
switched on only when the AC transfer switch is activated, and power is drawn from an
external source with a larger capacity than the inverter.
Some appliances like motors or pumps, draw large inrush currents at startup. It is possible
that the startup current exceeds the overcurrent trip level of the inverter. In this case the
output voltage will shortly decrease to limit the output current of the inverter. If the
overcurrent trip level is continuously exceeded, the inverter will shut down and
automatically restart within 20 seconds. In this case it is advisable to disconnect this
appliance from the inverter, since it requires too much power to be driven by this unit. The
Powersine Combi needs to be restarted manually when it has shut down due to overloads
for four times in a row. Note that at higher ambient temperature levels, the overload
capacity of the Powersine Combi will be reduced.
