Miller 900019 Instrukcja instalacji i obsługi - Strona 8

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Miller 900019 Instrukcja instalacji i obsługi
terminal at the
top
as
this then
permits
the power
cord
to
hang
downward without undue
bending
or
twisting.
Models with other than 230 volt
only primary
input
voltages,
are
equipped
with
a
voltage changeover
terminal
strip
and two
jumper
links.
This terminal
strip
is accessible
by opening
the
access
door
on
the
rear
panel.
The terminal
strip
is
located at the
rear
of
the
welding
machine
base.
If the
welding
machine is
furnished
with
a
pri
mary
voltage changeover
terminal
strip,
connect the
jumper
links to the indicated
voltage
terminals
to
match the
primary input voltage.
Whenever
only
one
jumper
link connection is
necessary for
the proper
input
voltage,
connect both
jumper
links
across
the
same
two
terminals.
This will
help prevent losing
the second
jumper
link.
Refer
to
Figure
3-2
for
proper
jumper
link
connections.
Welding
machines
are
shipped,
unless
otherwise
ordered,
with the
jumper
links
connected
in
the
highest
voltage
position.
This
welding
machine should be
operated
from
a
separately
fused
or
circuit breaker
protected
cir
cuit.
The maximum
capacity
of the
welding
machine
is
affected
by
the line
voltage
and if the circuit is
overloaded,
the
performance
of the
welding
machine
will be
impaired.
Install
a
cable of two
primary
wires
plus
one
ground
wire
(see
Table 3-1 for proper wire and fuse
sizes)
from the line disconnect switch
or
circuit
breaker to the WALL
RECEPTACLE.
See
Figure
33.
For models without
a
three
prong
plug,
a
60
am
pere
plug
may
be installed to the
welding
machine
primary
input
cable and the
receptacle
to the line
disconnect switch.
A
grounding
wire must be
run
to
a
suitable
ground
ing
medium such
as
the electrical conduit
system,
the water
system
or
a
regular
driven
ground
rod.
Check
with the local
inspection authority
if there is
any
question
as
to
an
accepted grounding
method.
Models with
a
three
prongpolarizedplug,plugin
to the wall
receptacle.
For models without
a
three
prong
plug,
connect the
No. 10 green
wire to the
ground
wire
or
connection in the line disconnect
switch and the two
No. 8 wires
to the power
leads.
3-3.
SECONDARY
(WELDING)
CONNECTIONS
It is recommended that the
welding
cables be
kept
as
short
as
possible, placed
close
together
and be of
adequate
current
carrying capacity.
The resistance
of the
welding
cables and connections
cause
a
volt
age
drop
which is added to the
voltage
of the
arc.
Excessive
cable
resistance
may result in
over
loading
as
well
as
reducing
the maximum current
output
of which
the
welding
machine is
capable.
When
welding
with ac,
longer
cables if coiled up,
will
generate
a
magnetic
field that
can
reduce
the
output
of
the
welding
machine.
The
welding
cables
from the work and electrode holder
to the
welding
machine should be
taped together
at short
intervals.
The proper
operation
of any
arc
welding
machine
is to
a
great
extent
dependent
on
the
use
of
welding
cables and
connections that
are
in
good
condition
Table 3-2.
Secondary Welding
Cable Size
WELDING
AMPERES
TOT AL
LENGTH
OF
CABLE) COPPER)
IN
WELD CIRCUIT
50
100
150
200
250
300
100
2
2
1
1/0
2/0
3/0
150
2
1
2/0
3/0
4/0
200
2
1/0
3/0
4/0
250
2
2/0
4/0
300
1
3/0
NOTE:
A.
50
FEETOR
LESS
B.
CABLE SIZE
IS
BASED
ON DIRECT CURRENT
(DC),
20%
DUTY
CYCLE
AND
EITHER
A 4
VOLTS
OR LESS
DROP
OR
A
CURRENT
DENSITY
OP
NOT
OVER
300
CIRCULAR
MILS
PER
AMP.
C.
WELD
CABLE INSULATION
WITH A
VOLTAGE
RATING
TO WITH
STAND THE OPEN
CIRCUIT
VOLTAGE
IO.C.V.) OF
THE
WELD
ING
MACHINE
MUST
BE
USED.
WHILE MOST WELDING
MA
CHINES
HAVE
AN
OPEN
CIRCUIT VOLTAGE
OP
LESS
THAN
100
VOLTS,
SOME
WELDING
MACHINES OF
SPECIAL DESIGN
MAY
HAVE HIGHER OPEN CIRCUIT VOLTAGE.
~~1
Table 3-1. Recommended
Primary
Wire And Fuse Sizes
MODEL
PRIMARY WIRE SIZE
(From
source
to
line disconnect
switch)
FUSE SIZE
(AMPERES)
115V
208V
230V
460V
575V
115V
208V
230V
460V
575V
180
Amp
Model
Without P.F.C.
180
Amp
Model
With P.F.C.*
225
Amp
Model
Without P.F.C.
225
Amp
Model
With P.F.C.
No. 2
(No. 6)
No.4
(No.6)
No. 2
(No. 6)
No.3
(No.6)
No. 6
(No. 8)
No.8
(No.8)
No. 6
(No. 8)
No.6
(No.8)
No. 8
(No. 8)
No.
10
(No. 10)
No. 6
(No. 8)
No.8
(No. 8)
No. 12
(No. 12)
ND. 14
(No. 14)
No. 10
(No. 10)
No. 12
(No. 12)
No. 14
(No. 14)
No. 14
(No. 14)
No. 12
(No. 12)
No. 12
(No. 14)
150
110
175
150
80
70
100
80
70
60
90
75
35
30
45
35
30
25
35
30
Numbers
in
I
4
are
ground
mire
sizes.
Pomer
Factor Correction.
AA-900 B23-9
Figure
3-3.
Primary
Connections
iee
SzS
voits
ate
voLts
373
VOLtS
:
A-BOO g23-e
Figure
3-2.
Primary Voltage
Link
Arrangement
Page
6