Assessments - 4, GPA: 3
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Safe Practices For Occupation And Educational Eye And Face Protection, norme ANSI Z87.1, de l’American National Standards Institute, 1430 Broadway, New York, NY 10018. Cutting and Welding Processes, norme NFPA 51B, de la National Fire Protection Association, Batterymarch Park, Quincy, MA 02269. 1-4. Principales normes de securite OM-279 Page 7 1-5. Information sur les champs electromagnetiques 1-5. Information sur les champs electromagnetiques Donnees sur le soudage electrique et sur les effets, pour l’organisme, des champs magnetiques basse frequence Le courant de soudage ou de coupage passant dans les cables de puissance cree des causera des champs electromagnetiques. Il y a eu et il y a encore un certain souci a propos de tels champs. Cependant, apres avoir examine plus de 500 etudes qui ont ete faites pendant une periode de recherche de 17 ans, un comite special ruban bleu du National Research Council a conclu: “L’accumulation de preuves, suivant le jugement ducomite, n’a pas demontre que l’exposition aux champs magnetiques et champs electriques a haute frequence represente un risque a la sante humaine”. Toutefois, des etudes sont toujours en cours et les preuves continuent a etre examinees. En attendant que les conclusions finales de la recherche soient etablies, il vous serait souhaitable de reduire votre exposition aux champs electromagnetiques pendant le soudage ou le coupage. Afin de reduire les champs electromagnetiques dans l’environnement de travail, respecter les consignes suivantes : 1 Garder les cables ensembles en les torsadant ou en les attachant avec du ruban adhesif. 2 Mettre tous les cables du cote oppose de l’operateur. 3 Ne pas courber pas et ne pas entourer pas les cables autour de vous. 4 Garder le poste de soudage et les cables le plus loin possible de vous. 5 Relier la pince de masse le plus pres possible de la zone de soudure. Consignes relatives aux stimulateurs cardiaques : Les consignes mentionnees precedemment font partie de celles destinees aux personnes ayant recours a un stimulateur cardiaque. Veuillez consulter votre medecin pour obtenir plus de details. OM-279 Page 8 SECTION 2 – INSTALLATION 2-1. Specifications Model ModelModel Amperes Input at Rated Load Output 60 Hz Type of Output Plasma Gas Rated Output Rated Cutting CuttingCutting Capacity Maximum Open- Circuit CircuitCircuit Voltage DC200 V 230 V 460 V 575 V KVA KW Single- Phase 42.30 (3.40*) 36.80 (2.95*) 18.40 (1.50*) –– 8.49 (0.68*) 6.55 (0.20*) Direct Current, Straight Polarity (DCEN) Air Or Nitrogen Only 50 A @ 1 11 1 11 0 00 V VV olts oltsolts DC, 60% Duty Cycle 0.7 in (18 mm) At 10 IPM 280 3-Phase –– 18.40 (2.13*) 9.20 (1.07*) 7.40 (0.85*) 7.32 (0.85*) 6.60 (0.32*) *While idling 2-2. Dimensions And Weight C Dimensions A 36-3/4 in (934 mm) B 24-1/2 in (622 mm) C 21 in (533 mm) A AA Weight Single-Phase Models: 147 lb (66 kg)* Three-Phase Models: 168 lb (76 kg)* B Ref. ST-801 454-B *Without Torch 6 Minutes Cutting 4 Minutes Resting 2-3. Duty Cycle And Overheating Duty Cycle is percentage of 10 minutes that unit can cut at rated load without overheating. If unit overheats, thermostat(s) opens, output stops, and cooling fan runs. Wait fifteen minutes for unit to cool. Reduce amperage or duty cycle before cutting. Exceeding duty cycle can damage unit and void warranty. 60% Duty Cycle Overheating 0 15 A OR Reduce Duty CycleMinutes duty1 4/95 OM-279 Page 9 OM-279 Page 10 2-4. Cutting Speed The cutting speed curve shows the recommended maximum cutting speed capabilities of the power source and torch for mild steel of various thickness. Exceeding recommended cutting speeds will cause rapid erosion of the tip and electrode. ST-180 909 Cutting speed is approximately 10 inches per minute at 0.7 in mild steel thickness at max setting/ tip saver mode. 2-5. Selecting A Location 1 Handle Use handle to roll unit short distances. 2 Lifting Eye 3 Lifting Forks Use lifting eye or lifting forks to move unit. If using lifting forks, extend forks beyond opposite side of unit. 4 Rating Label (Under Access Door) Use rating label to determine input power needs. 5 Line Disconnect Device Locate unit near correct input power supply. Special installation may be required where gasoline or volatile liquids are present – see NEC Article 511 or CEC Section 20. OR 2 3 Movement ST-800 402 / Ref. ST-801 454-B 4 Location And Airflow 5 8 in (203 mm) Do not block airflow around base of unit. 2 1 18 in (460 mm) OM-279 Page 11 2-6. Connecting Gas/Air Supply 1 Unit Gas Fitting (Female 1/4 NPT) 2 Quick Connect Gas Fitting 3 Standard Gas Fitting Obtain and install desired fitting. 4 Hose Obtain suitable hose according to installed fitting, and connect to fitting. Route hose to gas/air supply. Adjust gas/air pressure according to Section 3-2. Incorrect plasma gas can cause torch and power source damage. Use only air or nitrogen for the plasma gas. Ref. ST-801 455 From Gas/Air Supply 3 Use only clean and dry gas/air with 70 to 150 psi (483 to 1034 kPa) p...