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Lincoln Electric MASTER LOAD IM575 - page 1
MAS TER LOAD 750 OPERA TORS MANUAL IM575 May, 2006 Safety Depends on You Lincoln arc welding and cutting equipment is designed and built with safety in mind. However, your overall safety can be increased by proper installation ... and thought- ful operation on your part. DO NOT INSTALL, OPERATE OR REPAIR THIS EQUIPMENT WITHOUT READING THIS MANUAL A ...
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Lincoln Electric MASTER LOAD IM575 - page 2
i i FOR ENGINE powered equipment. 1.a. Turn the engine off before troubleshooting and maintenance work unless the maintenance work requires it to be running. ____________________________________________________ 1.b. Operate engines in open, well-ventilated areas or vent the engine exhaust fumes outdoors. ____________________________________________ ...
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Lincoln Electric MASTER LOAD IM575 - page 3
ii ii WELDING EQUIPMENT SAFETY ARC RA YS can burn. 4.a. Use a shield with the proper filter and cover plates to protect your eyes from sparks and the rays of the arc when welding or observing open arc welding. Headshield and filter lens should conform to ANSI Z87. I standards. 4.b. Use suitable clothing made from durable flame-resistant material to ...
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Lincoln Electric MASTER LOAD IM575 - page 4
iii iii FOR ELECTRICALL Y powered equipment. 8.a. Turn off input power using the disconnect switch at the fuse box before working on the equipment. 8.b. Install equipment in accordance with the U.S. National Electrical Code, all local codes and the manufacturer’s recommendations. 8.c. Ground the equipment in accordance with the U.S. National Elec ...
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Lincoln Electric MASTER LOAD IM575 - page 5
iv WELDING EQUIPMENT SAFETY iv PRÉCAUTIONS DE SÛRETÉ Pour votre propre protection lire et observer toutes les instruc- tions et les précautions de sûreté specifiques qui parraissent dans ce manuel aussi bien que les précautions de sûreté générales suivantes: Sûreté Pour Soudage A L’Arc 1. Protegez-vous contre la secousse électrique: ...
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Lincoln Electric MASTER LOAD IM575 - page 6
v LOAD BANK SAFETY v The load bank is an industrial test unit designed to be used indoors or outdoors (sheltered from moisture). However, because the nature of the load bank’s func- tion is the dissipation of electrical energy, electrical energy is transformed into heat by the resistor ele- ments. The heat is removed from the load bank by airflow ...
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Lincoln Electric MASTER LOAD IM575 - page 7
vi MASTER LOAD 750 vi Thank You for selecting a QUALITY product by Lincoln Electric. We want you to take pride in operating this Lincoln Electric Company product ••• as much pride as we have in bringing this product to you! Read this Operators Manual completely before attempting to use this equipment. Save this manual and keep it handy for qu ...
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Lincoln Electric MASTER LOAD IM575 - page 8
MASTER LOAD 750 vii T ABLE OF CONTENTS DESCRIPTION TECHNICAL SPECIFICATIONS .........................................................................................1 SAFETY PRECAUTIONS ...................................................................................................2 GENERAL DESCRIPTION ........................................... ...
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Lincoln Electric MASTER LOAD IM575 - page 9
1 MASTER LOAD 750 1 82 dBA at 3 ft DESCRIPTION TECHNICAL SPECIFICA TIONS – MASTER LOAD 750 INPUT – POWER LOAD CAP ABILITY PROTECTION FUSES COOLING BLOWER Height Width Depth 34.75 in 24 in 28.5 in 883 mm 610 mm 724 mm PHYSICAL DIMENSIONS 120 VOLT, 15 A, 60 Hz , SINGLE PHASE 750 Amps @50V AC or DC (in incrementing fixed steps of 25, 25, 50, 50, 1 ...
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Lincoln Electric MASTER LOAD IM575 - page 10
GENERAL DESCRIPTION The Master Load 750 Load Bank is designed for elec- trically loading and testing power sources. The unit is designed for production line and job site use. The total loading capability of the Master Load 750 is in fixed steps of 25, 25, 50, 50, 100, 250, 250 Amps @ 50V AC or DC, totaling 750 Amps. Using the tog- gle switches on t ...
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Lincoln Electric MASTER LOAD IM575 - page 11
3 INST ALLA TION MASTER LOAD 750 3 BEFORE INST ALLA TION Inspect the Load Bank for obvious damage such as broken wires, broken or dented panels, cracked ceramic insulators, or any other component breakage that may have occurred in shipment. LOCA TION The Master Load 750 is a portable, indoor, outdoor Load Bank, and should be installed in a dry, coo ...
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Lincoln Electric MASTER LOAD IM575 - page 12
4 OPERA TION 4 PURPOSE AND USE OF CONTROLS 1. POWER ON/OFF switch - Turns on cooling fan and powers remainder of control circuit. Red light shows POWER ON. 2 . BLOWER FAIL indicator - The purpose of the BLOWER FAIL lamp is to warn the operator and remove the load to the load bank in case of an air failure or improper cooling of the load elements. 3 ...
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Lincoln Electric MASTER LOAD IM575 - page 13
5 MAINTENANCE 5 SAFETY PRECAUTIONS Before servicing, read and observe all safety precautions throughout this manual. ELECTRIC SHOCK can kill. • Only qualified personnel should perform this maintenance. • Turn the input supply power OFF at the disconnect switch or fuse box before working on this equipment. • Do not touch electrically hot parts ...
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Lincoln Electric MASTER LOAD IM575 - page 14
6 TROUBLESHOOTING & REP AIR 6 MASTER LOAD 750 If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact the Lincoln Electric Service Department for technical troubleshooting assistance before you proceed. Call 216-383-2531 or 1-800-833-9353. This Troubleshooting Guide is designed to b ...
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Lincoln Electric MASTER LOAD IM575 - page 15
7 TROUBLESHOOTING & REP AIR 7 MASTER LOAD 750 Observe all Safety Guidelines detailed throughout this manual If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact the Lincoln Electric Service Department for technical troubleshooting assistance before you proceed. Call 216-383-2531 ...
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Lincoln Electric MASTER LOAD IM575 - page 16
8 TROUBLESHOOTING & REP AIR 8 MASTER LOAD 750 Observe all Safety Guidelines detailed throughout this manual If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact the Lincoln Electric Service Department for technical troubleshooting assistance before you proceed. Call 216-383-2531 ...
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Lincoln Electric MASTER LOAD IM575 - page 17
9 TROUBLESHOOTING & REP AIR 9 MASTER LOAD 750 Observe all Safety Guidelines detailed throughout this manual If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact the Lincoln Electric Service Department for technical troubleshooting assistance before you proceed. Call 216-383-2531 ...
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Lincoln Electric MASTER LOAD IM575 - page 18
10 DIAGRAMS 10 MASTER LOAD 750 D26300 3-5-97 MASTERLOAD 750 - WIRING DIAGRAM ...
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Lincoln Electric MASTER LOAD IM575 - page 19
11 DIAGRAMS MASTER LOAD 750 11 SB2561 2-22-96 MASTERLOAD 750 - DIMENSION PRINT ...
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Lincoln Electric MASTER LOAD IM575 - page 20
P ARTS MASTER LOAD 750 D26244 SHT 1 & 2 3-6-97 MASTERLOAD 750 - GENERAL ASSEMBL Y ...
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Lincoln Electric MASTER LOAD IM575 - page 21
1 Base, Load Bank M18720 1 X 2 Side Panel, (Left) M18720-1 1 X 3 Side Panel, (Right) M18720-2 1 X 4 Venturi, Fan M18720-3 1 X 5 Rail (For Relay K8 Mtg.) M18720-62 1 X 6 Pan, Relay M18720-5 1 X 7 Panel, Screened M18720-6 2 X 8 Cover. Load Bank M18720-7 1 X 9 Cover. Res Element M18720-8 2 X 10 Terminal Board {RB} M18720-9 1 X 11 Terminal Board {RA} M ...
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Lincoln Electric MASTER LOAD IM575 - page 22
49 Bushing, Seal M18720-44 1 X 50 Spring M18720-45 42 X 51 Switch, Temp {S11} M18720-46 1 X 52 - - 53 Nut Assembled Washer M18720-47 84 X 54 Threadlocker M18720-48 AR X 55 Stud M18720-49 4 X 56 - - 57 - - 58 Semiconductor, Rectifier {CR1} M18720-52 1 X 59 - - 60 Shunt, 800A. 50MV {R10} M18720-53 1 X 61 Wire, Electrical 2 AWG M18720-54 75ft. X 62 - ...
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Lincoln Electric MASTER LOAD IM575 - page 23
NOTES ...
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Lincoln Electric MASTER LOAD IM575 - page 24
NOTES ...
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Lincoln Electric MASTER LOAD IM575 - page 25
NOTES ...
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Lincoln Electric MASTER LOAD IM575 - page 26
W ARNING A VISO DE PRECAUCION A TTENTION W ARNUNG A TENÇÃO Spanish French German Portuguese Japanese Chinese Korean Arabic READ AND UNDERST AND THE MANUF ACTURER’S INSTRUCTION FOR THIS EQUIPMENT AND THE CONSUMABLES TO BE USED AND FOLLOW YOUR EMPLOYER’S SAFETY PRACTICES. SE RECOMIENDA LEER Y ENTENDER LAS INSTRUCCIONES DEL F ABRICANTE PARA EL U ...
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Lincoln Electric MASTER LOAD IM575 - page 27
W ARNING A VISO DE PRECAUCION A TTENTION W ARNUNG A TENÇÃO Spanish French German Portuguese Japanese Chinese Korean Arabic LEIA E COMPREENDA AS INSTRUÇÕES DO F ABRICANTE PARA ESTE EQUIP AMENTO E AS P ARTES DE USO, E SIGA AS PRÁTICAS DE SEGURANÇA DO EMPREGADOR. ● Keep your head out of fumes. ● Use ventilation or exhaust to remove fumes fro ...
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Lincoln Electric MASTER LOAD IM575 - page 28
• Sales and Service through Subsidiaries and Distributors Worldwide • Cleveland, Ohio 44117-1199 U.S.A. TEL: 216.481.8100 FAX: 216.486.1751 WEB SITE: www.lincolnelectric.com • World's Leader in Welding and Cutting Products • ...
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