STUDER INNOTEC
COMPACT
User manual
COMPACT V4.0 E
17
The Transfer system is protected against overload with an automatic safety fuse on the AC Input
side of the COMPACT. If the system has been overloaded the button/pin of the fuse will pop-out.
To put the automatic safety system back in to operating you must push this pin back.
Note: In the Inverter operation, The COMPACT generates a true sinusoidal and quartz stabilized
output voltage. When, however the COMPACT is supplied from a grid or a generator and the
transfer contact is active, then you have at the output AC OUT the same voltage as that at the
input. This voltage can not be modified by the COMPACT!
4.7.1 Set the transfer voltage threshold
The voltage threshold of the transfer can by adjust between 150 to 230V with the turning knobs
(23). From factory this value is 200V. Most of appliances can work on this voltage. When the Input
voltages reach the settled value on turning knob, the inverter switch off and the AC INPUT go
directly on the AC OUTPUT. When the voltage INPUT is less of 20V the value set, the transfer is
stop and the OUTPUT switch back on the inverter.
Don’t use the turning knobs “TRANSFERT” (23) to adjust the AC OUTPUT voltage!
This is only it’s only a voltage threshold level to enable or disable the transfer.
4.7.2 FAST (UPS)- MODE for the Transfer Switch
The quick and break free Transfer mode is programmed with a slide switch „Transfer Delay“ OFF,
which is on the front side (cable connections side).
The aim of the COMPACT is to supply the consuming device with a break-free alternating voltage.
When the incoming voltage AC IN no longer matches values which have been set with the Turning
Knob 23, the Inverter switches on at once. The transfer is carried out in 0.02 seconds. This quick
transfer ensures a break-free function for most consuming devices. If you have an alternating
voltage back at the input AC IN, transfer system starts up again without any break, and the inverter
is stopped.
4.7.3 Delayed mode of the Transfer System
The delayed mode of the transfer system „Transfer Delay ON“ is programmed with the slide switch
on front with the cable connections. The COMPACT provides a break-free alternating voltage for
the consuming device. A quick transfer switch is not always sensible nor is it always desired. For
example, when the consuming devices are operated by a small back-up generator. An overload of
a short duration on such a generator, i.e. start of a vacuum cleaner etc., has the effect of
decreasing the voltage for a short time. As in such cases the transfer to the Inverter is not
desirable, the transfer system can be programmed with a delay. When the slide switch (Transfer
delay) is in the „On“ position, the transfer to the inverter takes place with a delay of 5 seconds. If
the voltage falls below 100Vac, the transfer takes place without delay! The transfer switching to the
Inverter takes place without any break.
4.8 The Solar charge controller (option)
The COMPACT also has a Solar Charge Controller built in. For charging the batteries, Solar
modules can be connected to the screw terminal SOLAR +/-. The in-built controller is a „Shunt
controller“ for the maximum input current of 30A for C 1600-12 and C 2600-24 and 20A for C 4000-
48. The operating voltage of solar panels to be connected must match the actual operating voltage
of the COMPACT and never exceeds the max. rated value.
Under no circumstances should any other systems such as wind-generator be connected at the
input of the Solar Charge Controller.
The Solar Charge Controller works automatically and is always in operation. As soon as the energy
is delivered from the Solar Charge Controller, LED 3 “SOLAR CHARGE” is lit and the batteries are
being charged. The Solar Charge Controller works even when the Battery Charger is functioning.
The way of working is the principally the same as that of the Battery Charger. The function is
described in the section on Battery Charger. The programming and the adjustments are carried out
in accordance with the same conditions. Check with your battery supplier which adjustments must
be carried out for your battery.