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ESAB LAW 400, Руководство по обслуживанию

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ESAB LAW 400 Скачать руководство пользователя страница 19

-- 19 --

claw0de1

+12V

Power supply to the display board and for loss of voltage detection.

See also Items 2 and 13 below.

+15VB

Power supply to circuits that are galvanically or high-- resistance separated from

other electronics on the circuit board.

+/--15V

Internal power supply for the circuit board.

+25VC

Internal power supply for the circuit board, protected by a PTC resistor, R150.

The resistance value of this resistor increases in the event of current overload.

2

DISPLAY OUTPUT

claw0e08

Outputs G1 -- G3 are used for serial data transfer of the welding current and arc

voltage to a digital display instrument, which may be fitted either in the power unit

or in the wire feed unit. The instrument is described in the service manuals for the

wire feeders MEK 4/4S/4SP.
Outputs G4 and G5 12 V to the instrument. This supply is protected by

PTC resistors R155 and R154. The resistors protect the circuit board against short

circuits to arc voltage or against other voltages occurring in the control cable to the

wire feed unit.

Содержание LAW 400

Страница 1: ...0740 800 025 9708 LAW 400 500 LAW 410 510 Welding rectifier Service manual...

Страница 2: ...ith part no 0486 220 880 15 AP1 COMPONENT POSITIONS Circuit board with part no 0486 291 880 16 AP1 COMPONENT POSITIONS Circuit board with part no 0486 480 880 version A 17 FUNCTION DESCRIPTION 18 AP2...

Страница 3: ...NG AND CUTTING CAN BE INJURIOUS TO YOURSELF AND OTHERS TAKE PRECAU TIONS WHEN WELDING ASK FOR YOUR EMPLOYER S SAFETY PRACTICES WHICH SHOULD BE BASED ON MANUFACTURERS HAZARD DATA ELECTRIC SHOCK Can kil...

Страница 4: ...Hz For speed control of the fan see ST2 below This capacitor has been fitted with effect from machine no 512 L1 Interphase transformer When connecting the interphase transformer to the inductor it is...

Страница 5: ...dule See the fault tracing instructions on page 26 and the fitting instructions on page 33 V7 LED yellow Lights to indicate operation of the thermal cutouts XS1 Connector 23 pole For connection to fro...

Страница 6: ...claw0e CONNECTION DIAGRAM LAW 400 500 400 415 V Valid for machine number 434 6 claw0de1...

Страница 7: ...VOLTAGE REFERENCE 3 MACHINE TYPE TEST INPUT 10 CRATER FILL 4 CONTROLLED FIXED FIRING ANGLE 11 START STOP 5 SYNCHRONISING 12 THYRISTOR CIRCUITS 6 THERMAL OVERLOAD CUTOUT 13 PROCESSOR 7 ARC VOLTAGE The...

Страница 8: ...NECTION DIAGRAM LAW 400 500 230 500 V Valid for machine number 434 claw0e03 8 claw0de1 Terminal block XT1 and transformer TC1 are connected for 400 415 V 50 Hz see the connection instructions on page...

Страница 9: ...VOLTAGE REFERENCE 3 MACHINE TYPE TEST INPUT 10 CRATER FILL 4 CONTROLLED FIXED FIRING ANGLE 11 START STOP 5 SYNCHRONISING 12 THYRISTOR CIRCUITS 6 THERMAL OVERLOAD CUTOUT 13 PROCESSOR 7 ARC VOLTAGE The...

Страница 10: ...CONNECTION DIAGRAM LAW 400 415 V Valid from machine number 512 claw0e21 10 claw0de1 AP2 fitted from machine no 550 Pulse function is added see page 29...

Страница 11: ...RATER FILL 3 MACHINE TYPE TEST INPUT 11 START STOP 4 CONTROLLED FIXED FIRING ANGLE 12 THYRISTOR CIRCUITS 5 SYNCHRONISING 13 PROCESSOR 6 THERMAL OVERLOAD CUTOUT 14 PRESET 7 ARC VOLTAGE 15 PULSE 8 SHUNT...

Страница 12: ...Valid from machine number 512 claw0e23 12 claw0de1 AP2 fitted from machine no 550 Pulse function is added see page 29 Terminal block XT1 and transformer TC1 are connected for 400 415 V 50 Hz see the c...

Страница 13: ...RATER FILL 3 MACHINE TYPE TEST INPUT 11 START STOP 4 CONTROLLED FIXED FIRING ANGLE 12 THYRISTOR CIRCUITS 5 SYNCHRONISING 13 PROCESSOR 6 THERMAL OVERLOAD CUTOUT 14 PRESET 7 ARC VOLTAGE 15 PULSE 8 SHUNT...

Страница 14: ...14 claw0de1...

Страница 15: ...15 claw0de1 claw0e19 AP1 COMPONENT POSITIONS Circuit board with part no 0486 220 880 Points GND1 GND6 are connected to the screen casing and to the electronic neutral 0V...

Страница 16: ...16 claw0de1 AP1 COMPONENT POSITIONS Circuit board with part no 0486 291 880 Points GND1 GND6 are connected to the screen casing and to the electronic neutral 0V claw0e24...

Страница 17: ...17 claw0de1 AP1 COMPONENT POSITIONS Circuit board with part no 0486 480 880 version A...

Страница 18: ...uit board These components are not used in the LAW power units 1 POWER SUPPLY CIRCUIT BOARD AP1 claw0e07 The power supplies from transformer TC1 to the circuit board are prepared for fitting PTC resis...

Страница 19: ...r increases in the event of current overload 2 DISPLAY OUTPUT claw0e08 Outputs G1 G3 are used for serial data transfer of the welding current and arc voltage to a digital display instrument which may...

Страница 20: ...ng of the voltage control potentiometer A controlled variable thyristor firing angle means that the thyristor output is also affected by the actual value of the arc voltage arc voltage control This me...

Страница 21: ...h serial numbers of 434 The thermal overload cutout ST1 is fitted to the thyristor heat sink cooling fins In the LAW 400 the cutout operates at a temperature of 60 _C while in the LAW 500 it operates...

Страница 22: ...sure the voltage between the positive and negative B welding current terminals The arc voltage is used with two different time constants S A time constant of 0 5 s for voltage indication on the digita...

Страница 23: ...B Time constants are as follows S a 0 5 s for arc voltage readout on the digital display S b 22 ms arc voltage feedback for control purposes S c 1 ms for detection of cessation of short circuiting If...

Страница 24: ...nterference to the machine case Circuit board 0486 480 880 Components marked in italics are fitted only to version A and later versions of this circuit board You can find out the version from the numb...

Страница 25: ...filling Crater filling during pulse welding only with MEK 4SP Phase 1 2 3 4 L4 low high low high 90 72 65 58 Phase 1 2 3 4 L4 low high low high Utop 80 62 55 40 Phase 1 2 3 4 L4 low high low high Ub 8...

Страница 26: ...nd destroy other thyristors If a thyristor fails always check the gate pulses before starting up the new thyristors If a thyristor has short circuited the other thyristors will also have been damaged...

Страница 27: ...lding voltage and welding current to the digital display instrument S Crater filling Reduces the arc voltage when the wire feed unit calls for crater filling S Test routine Controls the test routines...

Страница 28: ...Wire feed speed reference XS1 P claw0e27 This input is used only when an MEK 4S or MEK 4SP wire feed unit is connected to the LAW power unit The wire feeder sends an analogue wire feed speed signal t...

Страница 29: ...ediately when a pulsed synergy line has been selected and it is then stored in memory in the power unit The wire feed unit then transmits Ub continuously to the power unit as long as welding continues...

Страница 30: ...30 claw0de1 AP2 SUPPRESSION CIRCUIT BOARD Circuit diagram Component positions...

Страница 31: ...J4 on the circuit board claw0e09 Machine type test input S Close switch S1 on the test device S Start the machine The first test is of the display itself All segments of the display should be visible...

Страница 32: ...ts are open the display will show 1 1 1 L 17 Crater filling When the crater filling input L4 is open the display shows 1 1 1 When input L4 is low connected to 0VB at board contact L3 the display shows...

Страница 33: ...chines are on next page 1 Remove all dirt from the contact surfaces of the cooling fins where they contact the thyristor module 2 Apply a thin layer of thermal paste to the contact surfaces See item 4...

Страница 34: ...these modules will then also be delivered as spare parts the same part number as above Fit the thyristor modules in accordance with items 1 7 on the previous page noting the following differences S Th...

Страница 35: ...THYRISTOR MODULE 0456 536 001 Semikron SKMT 91 04D From machine number 550 644 The red cathode cables are connected to the cathode copper bar THYRISTOR MODULE 0456 536 001 Semikron SKMT 92 04D From ma...

Страница 36: ...36 claw0de1 LOAD CHARACTERISTIC LAW 400 410 connected to 400 V mains power supply claw0p08 LAW 500 510 connected to 400 V mains power supply claw0p09...

Страница 37: ...x835mm 800x640x835mm 800x640x835mm These welding power units fulfil the requirements of IEC 974 1 The S symbol indicates that the power units have been designed for use in areas of elevated electrical...

Страница 38: ...s shown below The machine is delivered connected for 400 415 V If it is to be connected to a 230 V supply the mains supply cable cross sectional area must be increased as shown in the table on the pre...

Страница 39: ...feed unit 7 Welding current terminal A 8 Welding current terminal B 9 The positive polarity welding terminal the socket for the control cable to the wire feed unit and the cooling water connections ar...

Страница 40: ...strument 0469 962 882 0469 962 882 Feed unit MEK 4 with water connection 0469 962 883 0469 962 883 Feed unit MEK 4 with instr and water conn 0455 175 880 0455 175 880 Feed unit MEK 4S 0455 175 881 045...

Страница 41: ...arrying program version P1 02 has been introduced with the following feature changes Mains voltage compensation has been introduced see item 4 in the function description The hot start function has be...

Страница 42: ...w design of the main transformer new ordering number for the main transformer see the spare parts list LAW 400 500 is repalced by LAW 410 510 The new main transformer has to be used as a spare part fo...

Страница 43: ...sidan Vid best llning var v nlig uppge typ och tillverkningsnummer samt ben mningar och best llningsnummer enligt reservdelsf rteckningen Die Ersatzteile k nnen bei der n chsten ESAB Vertretung beste...

Страница 44: ...plate 106 2 0211 103 005 Roll pin 8x28 107 1 0455 209 001 Side panel with text Left 108 2 0469 873 001 Castor wheel 125mm h 150mm 109 2 0469 872 001 Wheel 250mm 110 2 0192 859 126 Locking washer 111 2...

Страница 45: ...claw0p01 118 claw0p21 119 SPARE PARTS LIST LAW 400 500 45 claw0se1...

Страница 46: ...Option complete PI 1 1 0486 212 880 Circuit board For digital instrument 214 3 3 0455 226 010 Spacer For circuit board 215 1 1 0455 211 001 Cover 216 1 1 0193 260 061 Connector 2 pole XS5 1 1 0193 260...

Страница 47: ...SPARE PARTS LIST LAW 400 500 47 claw0se1 223...

Страница 48: ...oltage TM1 1 0457 102 880 Transformer 230 500 V mains voltage TM1 1 0457 104 880 Transformer 400 415 V mains voltage TM1 1 0457 106 880 Transformer 230 500 V mains voltage TM1 311 1 1 Nut M10 312 3 3...

Страница 49: ...SPARE PARTS LIST LAW 400 500 49 claw0se1 claw0p03 324 317 325...

Страница 50: ...T1 414 15 15 Screw M6x16 Machine No 434 6 15 Screw M6x16 From machine No 512 415 15 15 Washer 12 6 4x1 5 Machine No 434 6 15 Washer 12 6 4x1 5 From machine No 512 416 24 24 0219 504 303 Spring washer...

Страница 51: ...SPARE PARTS LIST LAW 400 500 51 claw0se1 claw0p04 420 415 421 416 421 416 414 419 claw0p18 412 403 417 418 419 414...

Страница 52: ...ow 0365 803 013 Quick connector Male with non return valve For connection set 8 35 meter 0365 803 010 Quick connector Male For connection set 1 7 meter 502 1 0455 162 001 Hose 503 1 0469 689 001 Water...

Страница 53: ...claw0p05 The pump motor is fitted horizontal from machine number 550 642 SPARE PARTS LIST LAW 400 500 53 claw0se1...

Страница 54: ...54 page...

Страница 55: ...ces d tach es 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 acco...

Страница 56: ...05 2 0468 796 001 Support plate 106 2 0211 103 005 Roll pin 8x28 107 1 0455 209 001 Side panel with text Left 108 2 0469 873 001 Castor wheel 125mm h 150mm 109 2 0469 872 001 Wheel 250mm 110 2 0192 85...

Страница 57: ...SPARE PARTS LIST LAW 410 510 57 claw0se2 claw0p01 118 claw0p21 119...

Страница 58: ...1 1 0366 296 003 Knob Only LAW with water cooler 212 1 1 0455 307 002 Switch Only LAW with water cooler QF2 213 1 1 0455 173 881 Digital instrument Option complete PI 1 1 0486 212 880 Circuit board F...

Страница 59: ...SPARE PARTS LIST LAW 410 510 59 claw0se2 223...

Страница 60: ...oltage TM1 1 0457 102 880 Transformer 230 500 V mains voltage TM1 1 0457 104 880 Transformer 400 415 V mains voltage TM1 1 0457 106 880 Transformer 230 500 V mains voltage TM1 311 1 1 Nut M10 312 3 3...

Страница 61: ...SPARE PARTS LIST LAW 410 510 61 claw0se2 claw0p03 324 317 325...

Страница 62: ...items 403 and 411 421 The items must be ordered separately 411 1 1 0469 861 884 Cable set 412 3 3 0469 693 880 Suppressor RC filter Z1 Z6 414 6 15 Screw M6x16 415 6 15 Washer 12 6 4x1 5 416 12 24 021...

Страница 63: ...SPARE PARTS LIST LAW 410 510 63 claw0se2 claw0p04 420 415 421 416 421 416 414 419...

Страница 64: ...For connection set 8 35 meter 0365 803 010 Quick connector Male For connection set 1 7 meter 502 1 0455 162 001 Hose 503 1 0469 689 001 Water tank Cover For water tank see item 224 504 1 0457 987 001...

Страница 65: ...claw0p05 SPARE PARTS LIST LAW 410 510 65 claw0se2 The pump motor is fitted horizontal in all LAW 410 and 510 machines...

Страница 66: ...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...

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