ESP EX-400 Guide de dépannage

F-15-108-AMay, 1997ESP-400CUTTING POWER SOURCEP/N 33518MAINTENANCE MANUALPANELREMOTECURRENT CONTROLThese INSTRUCTIONS are for experienced operators.

103.1 GeneralIf this equipment does not operate properly, stop work immediately and investigate the cause of the malfunction.Maintenance work must b

11A. Visual Analysis For Defective BR/BBR Components.1. Remove top and left side panels of Power Source. Inspect the 500 A BR fuse links (F3 and F4)

12determine the specific component. Electrical isolation is accomplished by unbolting the pigtail ofthe diode being tested.(b) If one or more fuse li

13(c) Ohmmeter check of SCRs (group or individual).1. Place one test probe on the POS heatsink (same as the shunt) and touch the other test probeto ea

14(c) An SCR is bad if it shows no, or very low resistance, in either direction.D. Replacing Faulty SCRs and Diodes.1. Make sure that heatsink mountin

15SECTION 4 TROUBLESHOOTING4.1 GeneralDISCONNECT PRIMARY POWER AT WALL SWITCH, OR CIRCUIT BREAKER,BEFORE ATTEMPTING INSPECTION OR WORK INSIDE OF THE

16SECTION 4TROUBLESHOOTING2. Faulty SCRs or diodes in Boost Bridge assembly. Check per Section 3, paragraph 3.4, steps A and C.3. SCR logic board def

17SECTION 4TROUBLESHOOTINGFigure 4-1. ESP-400 Power Source Schematic DiagramD-33071-B

18SECTION 4Figure 4-2. ESP-400 Power Source Wiring Diagram (Sheet 1 of 2)TROUBLESHOOTINGD-33072-B

19SECTION 4Figure 4-2. ESP-400 Power Source Wiring Diagram (Sheet 2 of 2)TROUBLESHOOTINGD-33072-B

2SECTION TITLE PAGEPARAGRAPHSection 1 Safety ...

20SECTION 5 REPLACEMENT PARTS5.1 GeneralReplacement Parts are illustrated on the following figures. When ordering replacement parts, order by pa

21SECTION 5 REPLACEMENT PARTSFigure 5-1. ESP-400 Power Source (Front View)1234516156, 7, 89101113*Any linear potentiometer, 5K to 25K ohms, will wor

22SECTION 5 REPLACEMENT PARTSFigure 5-2. ESP-400 Power Source (Right Side View)1234567810 9REF: BLACK JUMPER WIREDISCONNECTED FROM C22(+)FOR PARALL

23SECTION 5 REPLACEMENT PARTSFigure 5-3. ESP-400 Power Source (Left Side View)15166431, 2REF: PILOTARC WORKREF: NEGOUTPUTTERMINALSREF: WORK/POS. OUT

24REPLACEMENT PARTSSECTION 5Figure 5-4. ESP-400 Power Source (Top View)1414147131211 71067954321ItemNo.QtyReq.PartNo.Description CircuitSymbol123456

25REPLACEMENT PARTSSECTION 5ItemNo.QtyReq.PartNo.Description CircuitSymbol123456789101122336213134206235795175695006667674367234892W11676770950527676

F-15-108 5/97 3C Printed in U.S.A.IF YOU DO NOT KNOW WHOM TO CALLTelephone: (800) ESAB-123/ Fax: (803) 664-4452/Web: http://www.esab.comHours: 7:30 AM

3WARNING: These Safety Precautions are foryour protection. They summarize precaution-ary information from the references listed inAdditional Safety In

4FUMES AND GASES -- Fumes andgases, can cause discomfort or harm,particularly in confined spaces. Donot breathe fumes and gases. Shield-ing gases can

5SECTION 2DESCRIPTION2.1 IntroductionThe ESP-400 Plasma Power Source is designed for high speed plasma cutting applications. It is normally used w

6SECTION 2 DESCRIPTIONThe ESP-400 is powered by a three-phase main transformer which combines with solid state control to provide volt-amperes curve o

7DESCRIPTIONSECTION 2Figure 2-1. Volt-Ampere Curves THE VREF DESIGNATION SHOWN ON THE TYPICAL V/A CURVES (ABOVE) CORRESPONDSTO AN ABSOLUTE VOLTAGE

8B. For single Power source operation, either the master or the slave unit may be used, provided items 1. through 5.below are addressed. It is not nec

9TO CHANGE TO 380 V OR 415 V INPUT:On the main transformer (T1) - both master and slave:For 415 V input, move the wire from H4 to H3 for all three co