LHF 250 LHF 400 LHF 630 LHF 800

LHF 250
LHF 400
LHF 630
LHF 800
Service manual
0740 800 142
020328
Valid for serial no. 906--xxx--xxxx
LIST OF CONTENTS
Page
READ THIS FIRST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TECHNICAL DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
COMPONENT DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CONNECTION DIAGRAM LHF 250, LHF 400 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CONNECTION DIAGRAM LHF 630, LHF 800 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FUNCTION DESCRIPTION, CIRCUIT BOARD K70 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
K70:1 Reference input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
K70:2 Local / Remote selector switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
K70:3 Remote control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
K70:4 D/A converter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
K70:5 Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
K70:6 Thyristor trigger circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
K70:7 Thermal overload switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
K70:8 Shunt amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
K70:9 The MMA / TIG selector switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
K70:10 Air--arc gouging / MMA changeover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
K70 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
K70 Component positions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
REPLACEMENT OF THYRISTORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
INSTRUCTIONS LHF 250--800 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ORDERING OF SPARE PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ASSEMBLY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SPARE PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
NOTES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rights reserved to alter specifications without notice.
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39
READ THIS FIRST
Maintenance and repair work should be performed by an experienced person, and
electrical work only by a trained electrician. Use only recommended replacement parts.
This service manual is intended for use by technicians with electrical/electronic training for
help in connection with fault--tracing and repair.
Use the connection diagram as a form of index for the description of operation. The circuit
board is divided into numbered blocks, which are described individually in more detail in
the description of operation.
This manual contains details of all design changes that have been made to LHF machines
with serial no. 906--xxx--xxxx up to and including March 2002.
The LHF 250, LHF 400, LHF 630 and LHF 800 are designed and tested in accordance
with international and European standard IEC/EN 60974--1 and EN 50199.
On completion of service or repair work, it is the responsibility of the person(s) etc.
performing the work to ensure that the product does not depart from the requirements
of the above standard.
INTRODUCTION
The LHF 250/400/630/800 are thyristor--controlled welding power sources incorporating
mains voltage compensation and intended for MMA welding, TIG welding and air--arc
gouging. The mains voltage compensation ensures that the arc voltage and welding current
remain stable even though supply voltage may vary. Electronic control ensures that the
welding current maintains its set value at all times. A single knob regulates the welding
current over its entire range.
TECHNICAL DATA
Maximum load
35 % duty cycle
60 % duty cycle
100 % duty cycle
Setting range
Open circuit volt.
Open circuit output
at 400 V
Power factor
(max current)
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LHF 250
LHF 400
LHF 630
LHF 800
250 A/30 V
200 A/28 V
160 A/26 V
8A/20V--250A/30
(33)V
78--84 V
400 A/36 V
315 A/33 V
250 A/30 V
8A/20V--400A/36
V
80--87 V
630 A/44 V
500 A/40 V
400 A/36 V
8A/20V--630A/44
(49)V
65--72 V
800 A/44 V
630 A/44 V
500 A/40 V
8A/20V--800A/44
(50)V
65--72 V
300 W
340 W
615 W
640 W
0,88
0,90
0,87
0,82
-- 3 --
LHF 250
LHF 400
LHF 630
LHF 800
Efficiency
(max current)
Enclosure class
Application class
68 %
IP 23
74 %
IP 23
77 %
IP 23
78 %
IP 23
Weight
Dimens. lxwxh
160 kg
1310/765/705
195 kg
1310/765/705
260 kg
1310/765/705
295 kg
1310/765/705
Duty cycle
The duty cycle refers to the time in per cent of a ten--minute period that you can weld at a certain
load without overloading the welding power source.
Enclosure class
The IP code indicates the enclosure class, i. e. the degree of protection against penetration by solid
objects or water. Equipment marked IP 23 is designed for indoor and outdoor use.
Application class
The symbol
indicates that the power source is designed for use in areas with increased
electrical hazard.
COMPONENT DESCRIPTION
This component description referres to the connection diagrams on pages 6 to 9.
WARNING !
STATIC ELECTRICITY can damage circuit
boards and electronic components.
ESD
S
Observe precautions for handling electrostatic
sensitive devices.
S
Use proper static--proof bags and boxes.
K1
Main transformer.
K2.1
K2.2
K2.3
Main thyristors.
K2.4
K6
Freewheel diode.
K11
K12
K13
Mains terminal block.
K14
K18.1
Base current resistor, 8.6 τ ±5%.
Main diodes.
Base current diodes.
Mains switch.
Inductor.
Welding current terminals.
K18.2
Shunt -- 120 mV at 250 A (LHF 250), at 400 A (LHF 400), at 630 A (LHF 630)
and at 800 A (LHF 800).
Additional shunt for ampere meter, only LHF 630 and LHF 800.
K19
Ampere meter.
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K20
K24
Volt meter.
K25
K27.1
K27.3
Current relay. Activates contactor K62.2 during welding.
K27.4
K27.5
K28
Capacitor 5←F.
K30
K30.1
K31.1
Terminal block.
K31.2
Thermal switch: LHF 250: breaks at 140˚C, LHF 400: breaks at 160˚C, LHF
630: breaks at 150˚C, LHF 800: breaks at 130˚C.
Fitted in the winding of the main transformer, K1.
K33
K38.1
LOCAL/REMOTE control selector switch
K38.2
LED, yellow. On when the thermal overload is activated, i.e. when one or both
of the thermal switches K31.1 and K31.2 are open.
Contact, 15 pole, male.
K45.1
K45.2
Remote control socket
Transient protection.
Capacitor 0.1←F.
Capacitor, reduces the supply voltage to the fan. See K51.
Fan.
Terminal block.
Thermal switch: breaks at 68˚C, resets at 59˚C, tolerance ±3˚C.
Fitted on the thyristor heatsink.
Indicating lamp, 28 V.
Contact, 15 pole, female.
K45.3
K45.4
Contact, 12 pole, male.
K45.5
K45.6
K47
Contact, 6 pole, male.
K50
K51
Terminal block.
K52.1
K52.2
K57
K62.1
Contact, 12 pole, female.
Terminal block.
Starting capacitor for cooling fan.
Time relay. The fan runs at a reduced idle speed of 300 rpm. When welding
with currents greater than 30 A the fan speed increases to its working speed of
around 1350 rpm. Timer relay K51 maintains the higher speed setting for 6 1/2
minutes after welding has stopped.
Control power supply transformer, supplied at 35 V from K1s3. The secondary
winding supplies 19 V AC to circuit board K70.
Control power supply transformer for the time relay (K51).
Potentiometer (2 kτ) for controlling the welding current. Fine--resolution type,
fitted with planetary reduction gear.
Relay, controlling LED K38.2.
K62.2
K69
K70
Contactor. When K62.2 is activated the runs at working speed, see K51.
K79
Selector switch, TIG/MMA/Air--arc gouging. Only LHF 630 and LHF 800.
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Filter board (interference suppression).
Main control circuit board.
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CONNECTION DIAGRAM LHF 250, LHF 400
Primary side
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Secondary side
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CONNECTION DIAGRAM LHF 630, LHF 800
Primary side
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Secondary side
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FUNCTION DESCRIPTION, CIRCUIT BOARD K70
This description refers to the connection diagrams on pages 6 to 9 and to the block
diagram on page 16.
K70:1 Reference input
Reference potentiometer K57 (2kτ ±10% 2W, linear) is supplied at +15V.
The reference voltage is limited to 0--10V by potential divider R3/R4, and
connected to analog switch IC1.
Reference input and Local / Remote selector switch
K70:2 Local / Remote selector switch
Three analog switches (IC1) control signal switching for selection of local (internal)
or remote (external) control of the welding current.
These switches are, in turn, controlled by selector switch K33. The control voltage,
which can be measured at terminal A3, is either 0 V (K33 closed = internal
reference) or about +27 V (K33 open = remote reference).
IC1 contains four identical analog switches, of which three are used for
local/remote changeover switching. The switches conduct with a control voltage of
+15 V on pins 6, 12 and 13, and are open--circuit with a control voltage of 0 V.
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K70:3 Remote control
The remote control device, which can be a potentiometer or a pulse generator, is
connected to circuit board terminals A10, A11 and A12. It is supplied at 15 V.
A/D converter, IC10
The A/D converter and the voltage reference unit, see below, are galvanically
isolated from the rest of the control circuitry by optocoupler IC12. The A/D
converter converts the reference signal to a pulse train, in which the mark/space
ratio represents the magnitude of the reference signal.
Optocoupler IC12 transfers the pulse train to the D/A converter (see K70:4 below),
thus ensuring complete galvanic isolation between the voltage signal from the
remote control input and the other electronic equipment.
If selector switch K33 is in the REMOTE position, but no remote control device is
connected, the power source will give low welding current, as R112 produces a low
value of current reference signal.
Galvanically isolated voltage reference
The secondary output voltage from winding K1s3 on the main transformer supplies
35 V to control power supply transformer K52. The secondary voltage from K52
supplies 19 V to remote control output voltage regulator VR1 via diode bridge BR1.
The output voltage from VR1 is 16.2 V, which is reduced to 15.6 V after diode D12.
The regulator is current--limited to 120 mA by resistors R104--107, transistor Q19
and diode D12, making the remote control connection short circuit--proof.
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K70:4 D/A converter
The D/A converter, which recreates the mean value of the reference signal from the
pulse train from the A/D converter. The input signal is first amplified and filtered:
trimming potentiometer R87 adjusts the output signal from IC4:1 to 0 V when the
remote control potentiometer is at its minimum position and to +11.5 V when the
potentiometer is at its maximum position. The signal is then passed to analog
switch IC1, which is controlled by the LOCAL/REMOTE selector switch.
K70:5 Power supply
The control power supply is obtained from winding K1s3 on the main transformer,
which is connected in star. The voltage between the star point and the respective
phase terminals is about 19 V, and the star point is connected to B5, which is the
neutral in the electronic circuitry.
Resistors R125--127 are film resistors that protect the synchronising winding
against any short circuits on the circuit board.
Voltage regulator VR2 produces a +15 V stabilised voltage: trimming
potentiometer R129 provides fine adjustment. Resistors R128 and R130 restrict
the range over which the voltage can be adjusted to a maximum voltage of +18 V,
which is the maximum permissible supply voltage for the CMOS circuits.
D21 stabilises the negative voltage to --15 V. The power rating of R131 is such as
to allow the circuit to supply a load current of 30 mA.
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K70:6 Thyristor trigger circuits
The trigger unit converts the DC signal from the control amplifier to ignition pulses
that fire the thyristors at the correct point in the cycle.
The unit consists of three identical sections, one for each thyristor. A synchronising
winding K1s2, provides synchronising information for correct firing. The voltage
between B13/B14/B15 is approximately 35 V.
The ignition pulses are connected to each thyristor. The gate connections are
twisted together with the associated neutral connections in order to minimise the
risk of interference in the gate circuit.
K70:7 Thermal overload switch
The thermal overload switches K31.1 and K31.2 interrupts the power supply to
output transistors Q9, Q12 and Q15 in the trigger unit in the event of excessive
temperature. The switches resets automatically when the temperature has fallen.
Switch K31.1 is fitted on the thyristor heatsink. Switch K31.2 is fitted in the winding
of the main transformer. See page 5 for information on switch temperatures.
Operation of the thermal overload switch prevents the thyristors from receiving any
trigger pulses. The current flowing in the main welding circuit is then limited to the
basic current of 8 A.
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K70:8 Shunt amplifier
The shunt amplifier amplifies the voltage signal from the shunt.
The shunt provides an output voltage signal of 120 mV for the maximum welding
current of each power source. (250 A, 400 A, 630 A and 800 A respectively.)
K70:9 The MMA / TIG selector switch
Changeover between MMA and TIG welding modes is controlled by transistor Q16,
which is controlled by switch K79.
In the MMA welding mode, the control voltage at A1 is about --25 V (switch K79
open), while in the TIG welding mode it is 0 V (K79 closed).
K70:10 Air--arc gouging / MMA changeover
This function is only avilable in the LHF 630 and LHF 800.
A contact on switch K79 links contacts A9--A12 in the galvanically isolated remote
control circuit to change the operating mode to air--arc gouging. (Switch K79 also
selects MMA or TIG welding modes.)
Optocoupler IC11 is activated in the air--arc gouging mode, and in turn activates
the air--arc gouging control circuits.
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K70 Block diagram
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K70 Component positions
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REPLACEMENT OF THYRISTORS
LHF 400 Offshore, LHF 630 and LHF 800
When fitting replacement thyristors, it is extremely important that they are correctly secured,
i.e. with a clamping force of 4500 N (450 kp) ±10% for LHF 400 Offshore and LHF 630.
For the LHF 800 the claming forc is: 5490--5530 N.
Clean the flat surfaces of the thyristors and heat sinks carefully, and remove any burrs or
traces of grease or oil. Apply a very thin film of silicone grease to the contact surfaces of
the heat sink, and position the thyristor between the surfaces with the symbol on the
thyristor facing in the direction as shown in the diagram below. Centre the thyristor by
locating the pin projecting from the pressure cap in the depression in the thyristor body.
Start by finger--tightening the nuts enough to remove play between the nuts and washers.
Then, using a dial gauge or depth gauge, measure the distance from the plate to the spring
as shown in the diagram below.
Tighten the nuts alternately with a spanner until the distance has decreased by 0.9 ±0.05
mm for LHF 400 Offshore and LHF 630. For the LHF 800 the measure is 1.0 ±0.05 mm.
Fitting of thyristors
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INSTRUCTIONS LHF 250--800
This chapter is an extract from the instructions for the LHF 250, LHF 400, LHF 630 and
LHF 800.
SAFETY
WARNING
ARC WELDING AND CUTTING CAN BE INJURIOUS TO YOURSELF AND OTHERS. TAKE PRECAUTIONS WHEN WELDING. ASK FOR YOUR EMPLOYER’S SAFETY PRACTICES WHICH SHOULD BE
BASED ON MANUFACTURERS’ HAZARD DATA.
ELECTRIC SHOCK -- Can kill
S
Install and earth the welding unit in accordance with applicable standards.
S
Do not touch live electrical parts or electrodes with bare skin, wet gloves or wet clothing.
S
Insulate yourself from earth and the workpiece.
S
Ensure your working stance is safe.
FUMES AND GASES -- Can be dangerous to health
S
Keep your head out of the fumes.
S
Use ventilation, extraction at the arc, or both, to keep fumes and gases from your breathing zone and
the general area.
ARC RAYS -- Can injure eyes and burn skin.
S
Protect your eyes and body. Use the correct welding screen and filter lens and wear protective
clothing.
S
Protect bystanders with suitable screens or curtains.
FIRE HAZARD
S
Sparks (spatter) can cause fire. Make sure therefore that there are no inflammable materials nearby.
NOISE -- Excessive noise can damage hearing
S
Protect your ears. Use ear defenders or other hearing protection.
S
Warn bystanders of the risk.
MALFUNCTION -- Call for expert assistance in the event of malfunction.
READ AND UNDERSTAND THE INSTRUCTION MANUAL BEFORE INSTALLING OR OPERATING.
PROTECT YOURSELF AND OTHERS!
INTRODUCTION
LHF 250/400/630/800 are thyristor controlled welding rectifiers designed for welding with
coated electrodes, TIG welding and arc air gouging.
The welding rectifiers can be used with the following remote control devices:
PHA 1, PHA 2, PHA 5, PHB 1, PHB 2, och PHC 2.
An auxiliary control unit is required for TIG welding with high frequency arc ignition.
LHF 400/630, versions with meters and timed cooling fan.
These welding rectifiers are equipped with a volmeter, ammeter and a circuit that reduces
the idle speed of the cooling fan.
The meters allow current and voltage settings to be read from the front of the rectifier.
To minimise the amount of dust and dirt that is drawn into the rectifier the fan runs at a
reduced idle speed of 300 rpm. When welding with currents greater than 30 A the fan speed
increases to its working speed of around 1350 rpm. A timer relay maintains the higher
speed setting for 6 1/2 minutes after welding has stopped to ensure adequate cooling of the
rectifier.
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INSTALLATION
The installation shall be executed by a professional.
WARNING!
This product is intended for industrial use. In a domestic environment this product may cause radio
interference. It is the user’s responsibility to take adequate precautions.
S
Installation must be carried out by a qualified electrician.
S
Check that the welding rectifier is configured for the available mains supply before
connecting it to the mains.
S
See Connecting to mains for cable rating and fuse rating.
S
Connect the mains cable to the rectifier according to the relevant regulations and install
a suitable fuse in the main fuse box.
S
Make sure the welding rectifier is not covered or positioned so that cooling is
obstructed.
Connecting to mains
LHF 250
LHF 400
LHF 630
LHF 800
Frequency
50 Hz
50 Hz
50 Hz
50 Hz
Voltage
230/400/
415/500 V
230/400/
415/500 V
230/400/
415/500 V
230/400/
415/500 V
Current at
100% duty cycle
60% duty cycle
35% duty cycle
20/11/11/9A
25/14/14/11 A
31/18/18/14 A
34/19/19/16 A
42/24/24/20 A
53/31/31/25 A
65/38/38/30 A
81/47/47/38 A
102/59/59/47A
86/49/49/40 A
107/62/60/50A
136/79/79/63A
Fuse, slow
25/16/16/16 A
63/25/25/20 A
80/50/50/35 A
100/63/63/50A
10/4/4/2.5
25/10/10/6
35/10/10/10
LHF 250
LHF 400
LHF 630
LHF 800
Frequency
60 Hz
60 Hz
60 Hz
60 Hz
Voltage
230/440/550V
230/440/550V
230/440/550V
230/440/550V
Current at
100% duty cycle
60% duty cycle
20/11/9 A
25/14/11 A
34/19/16 A
42/24/20 A
65/38/30 A
81/47/38 A
86/49/40 A
107/62/50 A
35% duty cycle
Fuse, slow
31/18/14 A
25/16/16 A
53/31/25 A
63/25/20 A
102/59/47 A
80/50/35 A
136/79/63 A
100/63/50 A
10/4/2.5
25/10/6
35/10/10
Cable area (4xmm2) 4/1.5/1.5/1.5
Cable area (4xmm2) 4/1.5/1.5
Cable areas comply with Swedish regulations.
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OPERATION
S
Set switch (1) to position ”I”. The white lamp (2) will light and the fan will start.
S
Select the welding method using the toggle switch (3).
S
Adjust the welding current using the knob (7) on the front, and set the toggle switch (8)
to the position nearest the socket.
S
Select suitable earth and return cables and connect them to the terminals marked +
and -- on the front of the rectifier. Connect the return cable to the work piece.
S
The rectifier is now ready for welding.
Controls and connections
1.
On/Off
2.
White lamp (power on)
3.
Method selector switch
4.
Arc air gouging
5.
MMA
6.
TIG
7.
Current setting
8.
Remote switch
9.
Remote socket
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10. Yellow lamp (thermal cut--out)
The yellow lamp comes on when the thermal cut--out trips.
When the rectifier has cooled down the thermal cut -- out is automatically reset.
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MAINTENANCE
Note:
All warranty undertakings given by the supplier cease to apply if the customer
attempts to rectify any faults on the machine during the warranty period.
Only those persons who have appropriate electrical knowledge (authorised
personnel) may remove the safety plates to connect or carry out service,
maintenance or repair work on welding equipment.
Cleaning
Check regularly that the power source is free from dirt.
How often, and to what extent, cleaning should be carried out depends on the
welding process, arc time, disposition and the surrounding environment. It will
normally suffice to blow the power source clean using compressed air (reduced
pressure) once a year.
If the power source is very dirty, brushing and vacuuming are recommended.
S
Disconnect the welding power source from the mains current supply.
S
Remove the adapter from the socket. Lock the socket to prevent unauthorised
connection.
At fixed installations, the safety switch should be set to the off position. Lock the
switch.
S
Remove the power source’s safety plates for best access.
After cleaning, all safety plates must be mounted before you connect the power
source to the mains supply.
ORDERING OF SPARE PARTS
LHF 250, LHF 400, LHF 630, LHF 800 is designed and tested in accordance with the international an European standards IEC/EN 60 974--1 and EN 60 974--1.
It is the obligation of the service unit which has carried out the service or repair work
to make sure that the product still conforms to the said standard.
Spare parts are ordered through your nearest ESAB representative, see back cover. When
ordering spare parts, please state machine type and number as well as designation and
spare part number as shown in the spare parts list on page 27.
This will simplify dispatch and ensure you get the right part.
clhf1de2
-- 24 --
Assembly instructions
bh10d002
bh10a12a
-- 25 --
page
-- 26 --
LHF 250, LHF 400, LHF 630, LHF 800
Edition 020328
Spare parts list
Valid for serial no. 906--xxx--xxxx
Ordering numbers for LHF 250, LHF 400, LHF 630, LHF 800
0319 782 882 LHF 250, 230/400/415/500V 50Hz, 230/440/550V 60Hz
0319 783 882 LHF 400, 230/400/415/500V 50Hz, 230/440/550V 60Hz
0319 783 886 LHF 400 Offshore, 230/400/415/500V 50Hz, 230/440/550V 60Hz
0319 950 882 LHF 630, 230/400/415/500V 50Hz, 230/440/550V 60Hz
0319 950 882 LHF 630 Offshore, 230/400/415/500V 50Hz, 230/440/550V 60Hz
0319 951 884 LHF 800 Offshore, 230/400/415/500V 50Hz, 230/440/550V 60Hz
Spare parts are to be ordered through the nearest ESAB agency as per the list on the back of the
cover. Kindly indicate type of unit, serial number, denominations and ordering numbers according to
the spare parts list.
Maintenance and repair work should be performed by an experienced person, and electrical work only
by a trained electrician. Use only recommended spare parts.
bh10s11a
-- 27 --
LHF 250, LHF 400, LHF 630, LHF 800
Edition 020328
C = component designation in the circuit diagram
Item
no.
Qty
Ordering no.
101
12
0151 270 001 Quick--locking nut
102
4
0192 547 001 Nut
103
6
0320 029 002 Ground link
104
2
0468 797 001 Gasket
105
2
0468 796 001 Support plate
106
2
02121 030 05
107
1
0321 497 001 Top cover
108
1
0455729 001
109
1
0469 937 002 Cover plate with screen
110
1
0466 931 002 Cover with text
111
2
0365 038 001 Wheel
112
1
0365 046 001 Axle
113
1
0320 939 002 Bracket left
114
1
0469 937 001 Cover plate with screen
115
1
0466 931 001 Cover with text
116
1
0320 939 001 Bracket right
117
2
0321 001 001 Ring
118
2
02188 012 02 Rubber handle
119
2
0321 000 001 Handle
120
6
02157 010 19 Circlip
121
2
0319 738 001 Foot
122
2
0319 455 002 Foot
123
8
0192 562 105 Nut
M6/t=0.7--1.6
124
4
0192 562 106 Nut
M6/t=1.8--2.6
125
21
0192 562 108 Nut
M8/t=1.8--2.6
bh10s11a
Denomination
Notes
Side plate
LHF 250
LHF 250
-- 28 --
C
LHF 250, LHF 400, LHF 630, LHF 800
Edition 020328
104
105
102
101
103
107
106
108
114
115
116
109
110
111
113
112
120
119
118
121
122
bh10s11a
117
-- 29 --
123
124
125
LHF 250, LHF 400, LHF 630, LHF 800
Edition 020328
C = component designation in the circuit diagram
Item
no.
Qty
201
2
0318 980 001 Insulating ring
202
2
0317 660 001 Element rod
203
1
0162 548 005 Resistor
204
1
00407 055 01 Connection block
205
1
0320 178 001 Washer
206
1
0319 838 001 Fan casing
207
1
0162 430 001 Fan
LHF 250/400/800
K28
208
1
0162 430 002 Fan
LHF 800
K28
209
1
0191 085 202 Capacitor, 2uf, 400V
LHF 250/400/630
K47
210
1
0191 085 106 Capacitor
LHF 800
K47
211
1
0193 587 005 Connection block
5 pole
K50
212
1
0320 131 880 Front panel
213
1
0469 950 880 Cable clamp
214
2
0320 805 881 Capacitor
215
2
0215 201 218 Seal o--ring, 24.2x3
LHF 250, LHF 400
3
0215 201 218 Seal o--ring, 24.2x3
LHF 630, LHF 800
2
0160 362 881 Cable connector OKC 50
LHF 250, LHF 400
K13
216
Ordering no.
Denomination
Notes
C
K14
2 pole
K27.3
3
0160 362 881 Cable connector OKC 50
LHF 630
K13
217
3
0160 362 882 Cable connector OKC 120
LHF 800
K13
218
1
0486 216 880 Filter
K69
219
1
0162 772 001 Connection block
K11
220
1
0319 774 880 Choke
LHF 250
K12
221
1
0319 774 883 Inductor
LHF 250
K12
222
1
0319 774 881 Inductor
LHF 400
K12
223
1
0319 774 882 Inductor
LHF 400 Offshore
K12
224
1
0319 944 880 Inductor
LHF 630
K12
225
1
0319 944 882 Inductor
LHF 630 Offshore
K12
226
1
0319 944 883 Inductor
LHF 800 Offshore
K12
227
1
0469 920 880 Transformer
LHF 250
K1
228
1
0469 920 881 Transformer
LHF 250 Offshore
K1
229
1
0469 920 882 Transformer
LHF 400
K1
230
1
0469 920 883 Transformer
LHF 400 Offshore
K1
231
1
0469 923 880 Transformer
LHF 630
K1
232
1
0469 923 881 Transformer
LHF 630 Offshore
K1
233
1
0469 923 883 Transformer
LHF 800 Offshore
K1
bh10s11a
-- 30 --
LHF 250, LHF 400, LHF 630, LHF 800
Edition 020328
205
201
207, 208
202
206
204
203
209, 210
227--233
211
220--226
213
212
218
216, 217
214
219
215
bh10s11a
-- 31 --
LHF 250, LHF 400, LHF 630, LHF 800
Edition 020328
C = component designation in the circuit diagram
Item
no.
Qty
301
1
0193 655 012 Terminal
12 pole
K45.6
302
6
0192 716 004 Diode
6A 400W LHF 250, LHF 400
K2.3
6A 400W LHF 630, LHF 800
K2.3
9 pole
K30
Current relay
K25
Ordering no.
Denomination
Notes
C
3
0192 716 004 Diode
303
1
0469 947 001 Sign
304
1
0162 781 008 Connection block
305
1
0456 111 001
307
1
0341 035 880 Circuit board
308
1
0156 688 001 Magnetic plate
K25
309
1
0193 296 101 Contactor
K62.2
310
1
0193 764 001 Time relay
K51
311
1
0193 298 101 Bar
312
1
0191 085 202 Capacitor
313
1
0365 028 001 Control transformer
314
1
0162 772 001 Connection block
3 pole
K30.2
315
1
0040 894 001 Connection block
6 pole
K30
bh10s11a
Sign
2uF, 400V
K27.5
K52.2
-- 32 --
LHF 250, LHF 400, LHF 630, LHF 800
bh10s11a
Edition 020328
-- 33 --
LHF 250, LHF 400, LHF 630, LHF 800
Edition 020328
C = component designation in the circuit diagram
Item
no.
Qty
Ordering no.
401
23
0192 784 102 Cap
402
1
0192 784 014 Socket
12 pole
K45.4
403
1
0192 784 013 Connector pin plug
12 pole
K45.3
404
23
0192 784 101 Pin
405
1
0192 784 016 Sleeve plug
15 pole
K45.2
406
1
0192 784 015 Plug
15 pole
K45.1
407
1
0320 498 002 Ammeter
408
1
0320 497 001 Voltmeter
409
1
0469 929 001 Front plate
LHF 400 V/A
410
1
0469 932 001 Front plate
LHF 630 V/A
411
1
0469 927 001 Front plate
LHF 250
412
1
0469 928 001 Front plate
LHF 400
413
1
0469 930 001 Front plate
LHF 630
414
1
0469 933 001 Front plate
LHF 800
415
2
0365 745 001 Circuit card holder
416
1
0320 745 001 Switch
LHF 250
K6
417
1
0320 745 002 Circuit braker
LHF 400
K6
418
1
0320 745 003 Switch
LHF 630/800
K6
419
1
0192 884 002 Capacitor
5uF
K27.4
420
1
0319 828 001 Transformer
K52.1
421
1
0319 876 880 Circuit card
K70, K45.1,
K45.4
422
2
0468 797 001 Gasket
423
4
02121 086 49 Screww
424
1
02188 107 84 Knob
425
1
0318 113 003
Knob
LHF 250/400
426
1
0318 113 004
Knob
LHF 630/800
427
1
0147 866 001 Toggle switch
428
1
0193 219 001 Toggle switch
429
1
0194 057 008 Relay
430
1
0369 733 009 Indicating lamp
Yellow
K38.2
431
1
0369 733 008 Indicating lamp
White
K38.1
432
1
0366 285 001 Dust cap
12 pole
433
1
0368 544 003 Burndy socket
12 pole
434
1
0319 187 001 Indicator
435
1
0317 942 001 Gearing for rheostat
436
1
0192 724 007 Potentiometer
437
1
0147 866 001 Toggle switch
LHF 250/400
K33
438
1
0193 219 001 Toggle switch
LHF 250/400 Offshore
K33
439
1
0147 866 002 Toggle switch
LHF 630/800
K33
440
1
0193 219 002 Toggle switch
LHF 630/800 Offshore
K33
bh10s11a
Denomination
Notes
C
K19
K20
M6x12
K79
Offshore
K79
K62.1
K57
-- 34 --
LHF 250, LHF 400, LHF 630, LHF 800
401
Edition 020328
405
407
402
408
406
403
411
409
412
410
404
413
414
415
416
417
418
422
421
420
423
419
424
425, 426
433
432
435 434
431 430
437
438
439
436
440
bh10s11a
-- 35 --
429
427
428
LHF 400 Offshore, LHF 630, LHF 800
Edition 020328
C = component designation in the circuit diagram
Item
no.
Qty
Ordering no.
Denomination
Notes
C
Rectifier bridge
501
1
0319 690 884 Thyristor bridge
LHF 400 Offshore
K2.1
502
1
0319 690 882 Thyristor bridge
LHF 630
K2.1
503
1
0319 932 880 Thyristor bridge
LHF 800
K2.1
504
1
0319 904 880 Diode bridge
LHF 400 Offshore, LHF 630
K2.2
505
1
0319 923 880 Diode bridge
LHF 800
K2.2
506
3
0320 028 002 Thyristor
LHF 400 Offshore, LHF 630
K2.1
507
3
0320 946 001 Thyristor
LHF 800
K2.1
508
1
0490 600 606 Diode
LHF 400 Offshore, LHF 630
K2.4
LHF 800
K2.4
2
0490 600 606 Diode
509
3
0041 051 606 Contact protection
510
3
0319 690 883 Tensioning device
LHF 400 Offshore, LHF 630
511
3
0319 932 881 Tensioning device
LHF 800
512
1
0319 999 001 Thermal Relay
LHF 400 Offshore, LHF 630 Offshore,
LHF 800
K31.1
513
1
0368 020 001 Thermal Relay
LHF 630
K31.1
514
1
0319 911 880
Shunt
LHF 630
K18
515
1
0319 911 881
Shunt
LHF 800
K18
516
0163 139 001 Bushing
517
0162 414 002 Insulating tube
bh10s11b
K27.1
-- 36 --
LHF 400 Offshore, LHF 630, LHF 800
Edition 020328
510
511
509
506, 507
508
501--503
514--515
517
516
504--505
512--513
bh10s005
bh10s11b
-- 37 --
LHF 250, LHF 400
Edition 020328
Rectifier bridge for LHF 250, LHF 400 From serial No. 906.
C = component designation in the circuit diagram
Item
no.
Qty
Ordering no.
Denomination
Notes
C
0458 219 880 Rectifier bridge compl.
001
1
0458 219 001 Thermal cutout
K31.1
002
1
0458 219 002 Filter
K27.1
003
1
0458 219 003 Diode
K2.4
004
3
0458 219 004 Rectifier bridge
K2.2
005
3
0320 028 008 Thyristor
K2.1
006
1
0320 558 880 Shunt
LHF 400
K18
007
1
0320 558 881 Shunt
LHF 250
K18
6, 7
bh10s11c
-- 38 --
NOTES
notes
-- 39 --
ESAB subsidiaries and representative offices
Europe
AUSTRIA
ESAB Ges.m.b.H
Vienna--Liesing
Tel: +43 1 888 25 11
Fax: +43 1 888 25 11 85
BELGIUM
S.A. ESAB N.V.
Brussels
Tel: +32 2 745 11 00
Fax: +32 2 726 80 05
THE CZECH REPUBLIC
ESAB VAMBERK s.r.o.
Prague
Tel: +420 2 819 40 885
Fax: +420 2 819 40 120
DENMARK
Aktieselskabet ESAB
Copenhagen--Valby
Tel: +45 36 30 01 11
Fax: +45 36 30 40 03
FINLAND
ESAB Oy
Helsinki
Tel: +358 9 547 761
Fax: +358 9 547 77 71
FRANCE
ESAB France S.A.
Cergy Pontoise
Tel: +33 1 30 75 55 00
Fax: +33 1 30 75 55 24
GERMANY
ESAB GmbH
Solingen
Tel: +49 212 298 0
Fax: +49 212 298 204
GREAT BRITAIN
ESAB Group (UK) Ltd
Waltham Cross
Tel: +44 1992 76 85 15
Fax: +44 1992 71 58 03
ESAB Automation Ltd
Andover
Tel: +44 1264 33 22 33
Fax: +44 1264 33 20 74
HUNGARY
ESAB Kft
Budapest
Tel: +36 1 20 44 182
Fax: +36 1 20 44 186
ITALY
ESAB Saldatura S.p.A.
Mesero (Mi)
Tel: +39 02 97 96 81
Fax: +39 02 97 28 91 81
THE NETHERLANDS
ESAB Nederland B.V.
Utrecht
Tel: +31 30 248 59 22
Fax: +31 30 248 52 60
NORWAY
AS ESAB
Larvik
Tel: +47 33 12 10 00
Fax: +47 33 11 52 03
POLAND
ESAB Sp.z.o.o
Warszaw
Tel: +48 22 813 99 63
Fax: +48 22 813 98 81
PORTUGAL
ESAB Lda
Lisbon
Tel: +351 1 837 1527
Fax: +351 1 859 1277
SLOVAKIA
ESAB Slovakia s.r.o.
Bratislava
Tel: +421 7 44 88 24 26
Fax: +421 7 44 88 87 41
SPAIN
ESAB Ibérica S.A.
Alcobendas (Madrid)
Tel: +34 91 623 11 00
Fax: +34 91 661 51 83
SWEDEN
ESAB Sverige AB
Gothenburg
Tel: +46 31 50 95 00
Fax: +46 31 50 92 22
ESAB International AB
Gothenburg
Tel: +46 31 50 90 00
Fax: +46 31 50 93 60
SWITZERLAND
ESAB AG
Dietikon
Tel: +41 1 741 25 25
Fax: +41 1 740 30 55
North and South America
ARGENTINA
CONARCO
Buenos Aires
Tel: +54 11 4 753 4039
Fax: +54 11 4 753 6313
Asia/Pacific
AUSTRALIA
ESAB Australia Pty Ltd
Ermington
Tel: +61 2 9647 1232
Fax: +61 2 9748 1685
CHINA
Shanghai ESAB A/P
Shanghai
Tel: +86 21 6539 7124
Fax: +86 21 6543 6622
INDIA
ESAB India Ltd
Calcutta
Tel: +91 33 478 45 17
Fax: +91 33 468 18 80
INDONESIA
P.T. Esabindo Pratama
Jakarta
Tel: +62 21 460 01 88
Fax: +62 21 461 29 29
MALAYSIA
ESAB (Malaysia) Snd Bhd
Selangor
Tel: +60 3 703 36 15
Fax: +60 3 703 35 52
SINGAPORE
ESAB Singapore Pte Ltd
Singapore
Tel: +65 861 43 22
Fax: +65 861 31 95
Representative offices
BULGARIA
ESAB Representative Office
Sofia
Tel/Fax: +359 2 974 42 88
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ESAB Egypt
Dokki--Cairo
Tel: +20 2 390 96 69
Fax: +20 2 393 32 13
ROMANIA
ESAB Representative Office
Bucharest
Tel/Fax: +40 1 322 36 74
RUSSIA-- CIS
ESAB Representative Office
Moscow
Tel: +7 095 937 98 20
Fax: +7 095 937 95 80
ESAB Representative Office
St Petersburg
Tel: +7 812 325 43 62
Fax: +7 812 325 66 85
Distributors
For addresses and phone
numbers to our distributors in
other countries, please visit our
home page
www.esab.com
ESAB Asia/Pacific Pte Ltd
Singapore
Tel: +65 861 74 42
Fax: +65 863 08 39
SOUTH KOREA
ESAB SeAH Corporation
Kyung--Nam
Tel: +82 551 289 81 11
Fax: +82 551 289 88 63
UNITED ARAB EMIRATES
ESAB Middle East
Dubai
Tel: +971 4 338 88 29
Fax: +971 4 338 87 29
BRAZIL
ESAB S.A.
Contagem--MG
Tel: +55 31 333 43 33
Fax: +55 31 361 31 51
CANADA
ESAB Group Canada Inc.
Missisauga, Ontario
Tel: +1 905 670 02 20
Fax: +1 905 670 48 79
MEXICO
ESAB Mexico S.A.
Monterrey
Tel: +52 8 350 5959
Fax: +52 8 350 7554
USA
ESAB Welding & Cutting Products
Florence, SC
Tel: +1 843 669 44 11
Fax: +1 843 664 44 58
ESAB AB
SE-- 695 81 LAXÅ
SWEDEN
Phone +46 584 81 000
Fax +46 584 123 08
www.esab.com
020314
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