Connection To The Mains Network - Sherman digitec DIGITIG 200DC MULTIPRO User Manual

5. CONSTRUCTION AND OPERATION
The basis for the construction of the welding machine's electricity conversion system are electronic systems made in IGBT technology enabling
operation in the frequency range above 200 kHz. The principle of operation consists in rectifying the voltage of a single-phase power supply to direct
voltage, converting the received direct voltage into a high-frequency rectangular waveform, transforming the voltage into the range required by the
welding process and re-straightening the obtained voltage to direct voltage. The welder is equipped with a supply voltage compensation system, which
enables their operation with voltage fluctuations in the supply network up to 10%.

6. CONNECTION TO THE MAINS NETWORK

1. The device should be used only in single-phase, three-wire power supply system with earthed zero point.
2. DIGITIG 200DC MULTIPRO inverter rectifiers are designed to work with 230V 50Hz mains protected with 25 A fuses with time delay. The
power supply should be stable, without voltage drops.
3. The device is equipped with a power cord and plug. Before connecting the power supply, make sure that the power switch (6) is in the
OFF position.
7. PREPARING THE APPLIANCE FOR WORK
If the device is stored or transported in low temperatures, the device should be brought to the right temperature before starting work
!!!
7.1 MMA method
The ends of the welding cables should be connected to the sockets (1) and (4) on the front panel so that the correct pole for the electrode is on the
electrode holder. The polarity of the welding cable connection depends on the type of electrode used and is indicated on the electrode packaging. The
ground hose clamp must be securely attached to the workpiece. Connect the device's plug to a 230V 50Hz power socket.
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