Miller AlumaPower 450 MPa Benutzerhandbuch - Seite 40
Blättern Sie online oder laden Sie pdf Benutzerhandbuch für Schweißen System Miller AlumaPower 450 MPa herunter. Miller AlumaPower 450 MPa 49 Seiten. Arc welding power source. 400 volt model
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8-3. Removing Case and Measuring Input Capacitor Voltage In 400 VAC Models
Tools Needed:
5/16 in.
OM-257219 Page 34
.
A complete Parts List is available at www.MillerWelds.com
4
Typical Bleeder Resistor
1
2
400 VAC input:
+ lead to lower
terminal, − lead to
upper terminal
25 to 1000 ohm,
5 watt resistor
#16 AWG 1000 volts DC
insulation rating, approx.
3 in. (76 mm) leads
3
3
!
Turn Off welding power
source, and disconnect in-
put power.
!
Significant DC voltage can
remain on capacitors after
unit is Off. Always check the
voltage as shown to be sure
the input capacitors have
discharged before working
on unit.
1
Right Side Panel
To remove panel, remove screws
securing panel to unit.
2
Interconnect Board PC2
3
Voltmeter
Measure the DC voltage across the
screw terminals on PC2 as shown
until voltage drops to near 0 (zero)
volts.
.
If the capacitor voltage does
not drop to near zero after sev-
eral minutes, use a bleeder re-
sistor of between 25 and 1000
ohms, at least 5 watts, #16
AWG 1000 volts DC insulating
rating wire to discharge the ca-
pacitor(s) .
4
Typical Bleeder Resistor
An example of a typical bleeder re-
sistor is shown on this page.
Proceed with job inside unit. Rein-
stall right side panel when finished.
Ref. 277764-A / Ref. 256682-B