Main Input Switch, Input Rectifier, Soft Start/Input Relay, Boost And Power Factor Correction, Auxiliary Voltages Board - Lincoln Electric INVERTEC 160SX Service Manual

MAIN INPUT SWITCH, INPUT RECTIFIER, SOFT START/INPUT
RELAY, BOOST AND POWER FACTOR CORRECTION,
MAIN INPUT SWITCH, INPUT
RECTIFIER, SOFT START/INPUT
RELAY, BOOST AND POWER FACTOR
CORRECTION, AUXILIARY VOLTAGES
BOARD
®
The INVERTEC 160SX can be connected from
115Vac to a 230Vac +/- 15% single phase input
voltage.
This unit can be also connect to engine driven
generators but it must follow the below conditions:
•
Vac peak voltage: below 410V.
•
Vac frequency: in the range of 50 and 60
Hertz.
•
RMS voltage of the AC waveform: from
115Vac to 230Vac ± 15%.
®
The INVERTEC 160SX automatically adjusts to
operate with different AC input voltages.
reconnect switch settings are required.
AUXILIARY VOLTAGES BOARD
No
Page12
The AC input power is connected to the Boost
Board. First stage on the Boost board is the RFI
filter than the AC input power is applied to an
input rectifier through a soft-start circuit consisting
of a 50 ohm PTC and a relay.
The Boost board uses the incoming voltage also
to create the auxiliary voltages. These auxiiary
voltages are used to power the circuitry of the
unit. Under normal operating conditions the Boost
board activates the soft start relay RL3 after input
power is applied to the machine. The 50 ohm
PTC will be"shorted out" by the relays RL1
contacts as soon as the correct value is detected
across the DC bus capacitors by the Boost logic
circuit. The boost switch is active when the input
voltage is below 385 Vdc. The output of the Boost
circuit is filtered and applied to the IGBT
controlled full wave bridge inverter.