Switch-mode power supply AC2000 N1 / DC2000 N1 / AC3000 N1 / DC3000 N1 - Operating instructions
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6 OPERATING INSTRUCTIONS
6.1 Safe operation/safe functioning
The appliance is operated exclusively from the front using the controls
located on the front panel. These are described in the respective
chapters and can be assigned using the labelling on the front panel of
the appliance.
6.2 Normal function
6.2.1 Electrical mode of operation
The device uses a booster to convert the input voltage into a higher,
smoothed DC voltage for the DC link (for AC voltage: sinusoidal current
consumption). MOSFETs generate a high-frequency AC voltage from
this. A transformer is used to isolate the potential and adapt the voltage
to the secondary side.
The high-frequency alternating voltage on the secondary side is
rectified via synchronously controlled MOSFETs. An output filter is
connected downstream to reduce the voltage ripple. The output voltage
and output current are regulated by modulating the MOSFETs.
6.2.2 Input
After the mains voltage is applied and the switch is pressed, the device
is switched on via a start-up stage that limits the inrush current to the
rated input current ("soft start").
6.2.3 Output
The output characteristic curve is an IU characteristic curve with a 1 %
slope of the voltage level. It does not matter which setpoint is selected
(section 6.3.4)
The device is designed to be permanently short-circuit proof and
operates in constant current control in the event of a short circuit until
the output voltage monitor intervenes if necessary (depending on type).
Devices with double short-circuit current capability can be used to
trigger load fuses in the event of a short circuit (depending on type).
Information on the short-circuit behaviour and behaviour of the
undervoltage monitoring (section 4).
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