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THEORY OF OPERATION
E-3 E-3
V160-S & -T
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INPUT BOARD
The input board includes the following circuits:
INPUT LINE VOLTAGE, FAN CIR-
CUIT, AUXILIARY VOLTAGE AND
PRECHARGE
The Invertec V160-S can be connected to a 115V or
230V single phase input voltage.
This unit can also connect to engine driven genera-
tors but it must follow the below conditions:
• Vac peak voltage: below 250V (for 115Vac input)
or 410V (for 230Vac input).
• Vac frequency: in the range of 50 and 60 Hertz.
• RMS voltage of the AC waveform:
V160-S: 115Vac or 230Vac +/- 10%
The initial power is applied to the Invertec V160-S
directly on the input board. A line switch located on
the back of the machine supplies the logic part that
manages machine functions. The voltage is after
rectified by the input on the input rectifier on the
input board and the resultant DC voltage is applied at
inverter Pcb’s.
During the precharge time the DC input voltage is
applied to the filter capacitors (located on the inverter
Pcb) through a precharge resistances (located on
input board) that limit the charge current. During
precharge time, an automatic system (manages by
reconnect board mounted on the input board) sets
the input board for 115V or 230V working mode (volt-
age duplicator when 115Vac is applied). After this
time the start relays go closed and they by-pass the
precharge resistances (there are two precharge
relays, RL1B and RL4B). The input voltage is also
applied to an auxiliary voltage circuit, that gives the
necessary low voltages (+15V, -5V and +5V) for the
control / display board and inverter board.
The fan is activated when the power is first supplied
to the machine. It will stay on as long as output is
present. The fan shuts down after 5 minutes when
the output is shut off.
FIGURE E.3 – INPUT BOARD
I
NVERTER BOARD
W
05X0190
(SCHEMATIC X0190)
GND
DC-
D
C+
W1
W
2
INPUT BOARD
W05X0250
(SCHEMATIC X0203)
Y/G
BLACK
RED
W
1DC-DC-
+
-
J
P1
JP1
J
P2
G
ND
AC2
A
C1
B
ROWN
BLUE
BLACK
WHITE
S1
1
3
4
2
D
C+
DC-A
1
15/230/1/50/60
Vac
GREEN
F
AN
J
1
WELD CONTROLLER
W05X0233
(
SCHEMATIC X0233)
D
ISPLAY BOARD
W05X0245
(
SCHEMATIC X0245)
JP1
CW
REMOTE
CONNECTOR
WARNING HIGH VOLTAGE CAN KILL
• Do not operate with coers removed.
• Disconnect input power by unplugging
power cord before servicing.
• Do not touch electrically live parts.
• Only qualified persons should install,
use or service this machine
1
2
3
6
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
1 2 3 4 5 6 7 8 9 10
26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
1 2 3 4 5 6 7 8
D E C B A
NOTE: Unshaded areas of Block Logic
Diagram are the subject of discussion