Advertisement
C04
Capacitor, 0.1 µF, 1000 VDC, protects the equipment against RFI.
C05
2 - - capacitors, 4.7 µF: see L02. Not mounted in LHN 130.
C06
2 - - capacitors, 12 nF. Protection against transient voltages.
Replacing AP04 from serial number 628- - xxx- - xxxx.
See "transient protection, rectifer unit V03, V04" on page 6.
C06 is replaced by ferrite rings (L03- - L05) from ser. no. 011- - xxx- - xxxx.
EV01
Fan, 24 VDC.
Note: The fans are different in LHN 130 and LHN 140/200.
In LHN 130 must not the same fan be used as in LHN 140/200.
HL01
Indicating lamp, 28 V, white, showing that the mains power supply is
turned on.
L01
Secondary inductor.
L02
Inductor. Not mounted in LHN 130.
Together with C05 and V06, this forms an LC circuit which reduces the
risk of the arc extinguishing at low welding currents.
Capacitor C05 in the LC circuit charges when V03 conducts. The circuit
can temporarily maintain a high output voltage at low welding current,
reducing the risk of the arc being extinguished.
Diode V06 protects capacitor C05 against negative voltage.
L03
LHN 140: Primary inductor, for improving the machine's form factor, i.e.
reducing mains loading.
LHN 200: Ferrite ring core (from serial number 011- - xxx- - xxxx).
L04
LHN 200: Coil, included in conductor 013.
LHN 140: Ferrite ring core (from serial number 011- - xxx- - xxxx).
L05
Ferrite ring core (from serial number 011- - xxx- - xxxx).
L06, L07
LHN 200: Ferrite ring cores, included in AP05.
QF1
Mains switch: 2- - pole in the LHN 130/140 and 3- -pole in the LHN 200.
RP01
Potentiometer for adjusting welding current, 10 kΩ, 2 W.
RS01
Shunt, 120 mV at 130 A or 140 A or 200 A respectively.
RV01
Varistor, 275 V, transient voltage protection. Only LHN 130/140.
From serial no. 540- - xxx- - xxxx the transient voltage protection is included
at circuit board AP05.
RV01- -RV03
Varistors, 480 V, transient voltage protection. Only LHN 200.
From serial no. 540- - xx- - xxxx the transient voltage protection is included at
circuit board AP05.
ST01
Thermal overload cutout, fitted in the main transformer (TC02) winding.
LHN 130/140: interrupts at 130
LHN 200: interrupts at 150
TC01
Control power supply transformer. Primary side is supplied at 230 V or
400 V respectively. Dual secondary windings supply 20.5 V and 17 V to
circuit board AP01.
TC02
Main transformer: see on page 29 for installation instructions.
cmha2de1
˚
C, recloses at 100
C, recloses at 130
C.
˚
˚
- - 5 - -
˚
C.
Advertisement
