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NEMA EW 1-1988 (R1994, R1999, R2004, R2019) Electric Arc-Welding Power Sources, 1988
- Section 1 [Go to Page]
- American National Standards Institute
- American Welding Society
- Recommended Safe Practices for Gas-Metal Arc Welding
- Standard Connections For Regulator Outlets, Torches and Fitted Hose For Welding and Cutting Equipment [Go to Page]
- Institute of Electrical and Electronics Engineers
- Standard Test Procedure for Polyphase Induction Motors and Generators Guide on Test Procedures for DC Machines [Go to Page]
- National Electrical Manufacturers Association
- Brushes For Electrical Machines [Go to Page]
- 1.2 DEFINITIONS
- Hose Handbook
- Test For Flammability of Plastic Materials for Parts in Devices and Appliances
- AC/DC GENERATOR-RECTIFIER ARC WELDING POWER SOURCE
- AC TRANSFORMER ARC WELDING POWER SOURCE
- AC/DC TRANSFORMER-RECTIFIER ARC WELD ING POWER SOURCE
- AUXILIARY POWER SUPPLY
- CONSTANT CURRENT ARC WELDING POWER SOURCE
- CONSTANT CURRENT/CONSTANT VOLTAGE ARC WELDING POWER SOURCE
- CONSTANT VOLTAGE ARC WELDING POWER SOURCE
- DC GENERATOR ARC WELDING POWER SOURCE
- DC GENERATOR-RECTIFIER ARC WELDING POWER SOURCE
- DC TRANSFORMER-RECTIFIER ARC WELDING POWER SOURCE
- DU'IYCYCLE
- EFFICIENCY
- ENCLOSURE
- ENGINE GENERATOR ARC WELDING POWER SOURCE
- FRAME
- HAND:.HELD ASSEMBLY
- HIGH FREQUENCY STABILIZED ARC WELDING POWER SOURCE
- INPUT CURRENT
- INPUT RATING
- JACK
- JACK PLUG
- LIVE PART
- LOAD CURRENT
- LOAD VOLTAGE
- MOTOR GENERATOR ARC WELDING POWER SOURCE
- MULTIPLE OPERATOR ARC WELDING POWER SOURCE
- MULTIPLE OPERATOR WELDING OUTLET
- NEMA CLASS I ARC WELDING POWER SOURCE
- NEMA CLASS II ARC WELDING POWER SOURCE
- NEMA CLASS III ARC WELDING POWER SOURCE
- OPEN CIRCUIT VOLTAGE
- PERCENT RIPPLE VOLTAGE
- RATED FREQUENCY
- RATED INPUT VOLTAGE
- RATED LOAD CURRENT
- RATED LOAD SPEED
- RATED LOAD VOLTAGE
- RATED OUTPUT
- SERVICE LINE HOSES
- SINGLE OPERATOR ARC WELDING POWER SOURCE
- SLOPE OF THE STATIC VOLT AMPERE CURVE
- STATIC VOLT AMPERE CHARACTERISTICS
- WELDING CIRCUIT
- WELDING LEADS
- WELDING n:RMINALS
- WORK LEAD [Go to Page]
- Page 6
- 2.1 SUITABIUlY OF OPERATION
- 2.2 SERVICE CONDITIONS
- 2.3 USUAL SERVICE CONDITIONS
- 2.4 UNUSUAL SERVICE CONDITIONS
- 2.5 INSTALLATION AND OPERATION
- 3.1 FRAME AND ENCLOSURE [Go to Page]
- An arc welding power source shall be so formed and assembled that it will have the strength and rigidity necessary to withstand the normal service to which it is likely to be subjected without increasing its shock, tire,
- An arc welding power source shall be so formed and assembled that it will have the strength and rigidity necessary to withstand the normal service to which it is likely to be subjected without increasing its shock, tire,
- Protection will usually be afforded if: (a) jaclcs and uninsulated current carrying parts of the power source, including the specified output terminal lugs in the case of threaded type connections, are recessed behind the vertical plane of the access ...
- 3.2.1 An enclosure shall be constructed of either sheet metal, cast metal, or a nonmetallic material. If the enclosure is constructed from sheet metal, the thickness shall not be less than that given in Tu.hies 3-1 or 3-2 (see also 3.2.2). These table...
- 3.2.1 An enclosure shall be constructed of either sheet metal, cast metal, or a nonmetallic material. If the enclosure is constructed from sheet metal, the thickness shall not be less than that given in Tu.hies 3-1 or 3-2 (see also 3.2.2). These table...
- 3.2.4 Among the factors to consider in determining the suitability of an enclosure are its: (1) physical strength,
- 3.3 OPENINGS IN ENCLOSURES
- PROBE
- ENCLOSURE OPENING
- Sources
- 3.4 CORROSION PROTECTION
- 3.5 SERVICE LINE HOSES
- 3.6 WATER COOLING [Go to Page]
- Any device or system using water for cooling, other than an integrated recirculating system, shall be capable of operating at an inlet water pressure ranging from 30 psi ('1D7 kPa) to 75 psi (517 kPa) and a water inlet temperature up to 49 C. For rati... [Go to Page]
- 3.7 BRUSHES
- 3.8 JERK AND DROP TESTS [Go to Page]
- If an eye or lug is provided for the purpose of lifting an assembled arc welding power source, such device shall be capable of withstanding afree fall jerk test. This test shall be made with the power source equipped with all associated attachments (e...
- If an eye or lug is provided for the purpose of lifting an assembled arc welding power source, such device shall be capable of withstanding afree fall jerk test. This test shall be made with the power source equipped with all associated attachments (e...
- An assembled arc welding power source equipped with all associated attachments (excluding trailers, carts, and wheel running gear) that are likely to be installed and, in the case of engine driven power sources completely serviced and ready for operat...
- An assembled arc welding power source equipped with all associated attachments (excluding trailers, carts, and wheel running gear) that are likely to be installed and, in the case of engine driven power sources completely serviced and ready for operat...
- SOURCES [Go to Page]
- If the manufacturer represents a power source for stacking, its enclosure, with all panels securely in place, shall be manufactured so that it will have the strength and rigidity to support the manufacturer's specified number and types of additional a... [Go to Page]
- MINIMUM THICKNESS OF SHEET METAL FOR ENCLOSURES- CARBON STEEL OR STAINLESS STEEL
- Table 3-2 [Go to Page]
- Not limited
- MINIMUM THICKNESS OF CAST METAL FOR ENCLOSURES [Go to Page]
- NEMA EW 1-1988 (R1994, R1999, R2004, R2019)
- Page 13
- SIZE OF INSULATED COPPER CONDUCTORS [Go to Page]
- Where:
- CONDUCTOR SIZE OF CORDS
- 4.2 POWER SUPPLY BY FLEXIBLE CORD [Go to Page]
- When a flexible cord is used as a part of the power source for power supply connection, it shall be a type S, SO, ST, or STO except that a NEMA Class m power [Go to Page]
- 4.7.1 Insulated Conductors
- 4.7.2 Uninsulated Conductors
- 4.7.3 Insulating of Uve Parts
- 4.10.1 Transformers
- 4.10.2 CapacHors
- 4.10.4 Operating Controls
- 4.10.5 Marking of Connections and Operating Controls
- 4.12.1 Receptacles
- 4.12.2 Protection [Go to Page]
- 4.12.3 Auxiliary Power Supply Circuit
- RATING AND PERFORMANCE [Go to Page]
- 5.1 INPUT RATING OF ARC WELDING POWER SOURCES OPERATING FROM ELECTRICAL POWER SUPPLIES [Go to Page]
- The preferred input voltages and frequencies shall be
- The input current(s) of an arc welding power source operating. from an electrical power supply shall be determined at the rated output when rated input volt age(s) and rated frequency(s) are applied.
- The input current(s) of an arc welding power source operating. from an electrical power supply shall be determined at the rated output when rated input volt age(s) and rated frequency(s) are applied.
- theinput current(s) shown on the name plateby more than 10 percent for NEMA Class I and NEMA Class II power sources and25 percent for NEMA Classmpo sources.
- theinput current(s) shown on the name plateby more than 10 percent for NEMA Class I and NEMA Class II power sources and25 percent for NEMA Classmpo sources.
- 5.2 POWER FACTOR CORRECTION [Go to Page]
- When power factor correction is provided, the cor rected value shall be measured at rated load, rated input voltage(s) and frequency(s). The corrected value shall not be less than 75 percent unless the corrected value is specified on the nameplate.
- 5.3 OPEN CIRCUIT VOLTAGE [Go to Page]
- The open circuit voltage, exclu high frequency stabilmltion voltage, of an arcwelding power source, using a voltmeter within the range of 100 ohms/volt and 1,000 ohms/volt, shall not exceed the following when rated input voltage is applied or when a g...
- Power Sources [Go to Page]
- 1. AC arc welding power
- 1. AC arc welding
- 5.4 OUTPUT RATINGS OF CONSTANT CURRENT NEMA CLASS I ARC WELDING POWER SOURCES [Go to Page]
- Constant current (see 1.2) NEMA Class I arc welding power sources having a duty cycle rating of 60, 80, or100 percent shall have an output rating in load amperes and load volts in accordance with Column 1 of Tubles 5-1 or 5-2. They shallbe capable of ...
- 5.4.2 AC or DC Arc Welding Power Sources [Go to Page]
- When the power source is operating at the maximum
- CONSTANT CURRENT, AC OR DC NEMA CLASS I ARC WELDING POWER SOURCES [Go to Page]
- 5.6 OUTPUT RATINGS OF CONSTANT CURRENT NEMA CLASS Ill ARC WELDING POWER SOURCES
- Table 5-5
- 5.8 NO LOAD OPERATION
- Table 5-6
- 5.10 NAMEPLATE MARKING
- Table 5-7 [Go to Page]
- 65 C 85 C 85 C 85 C [Go to Page]
- Table 5-8
- NEMA EW 1-1988 (R1994, R1999, R2004, R2019)
- Page 26
- 6.2.1 Definition
- 6.2.2 Measurement [Go to Page]
- 1. Test Procedure for Polyphase Induction Motors and
- 6.3.1 Definition
- 6.3.2 Measurement
- 6.3.3 Determination of Average Measured Temperature by the Resistance Method
- 6.4.1 DefinHion [Go to Page]
- mometer method. Accordingly, in the measurement of winding temperatures by the use of thermocouples, the method will be defined as the "applied thermocouple method" only if the thermocouples are applied directly to the conductors or are separated from... [Go to Page]
- 6.4.2 Measurement
- 6.5 DETERMINATION OF AMBIENT TEMPERATURE [Go to Page]
- When temperature measurements are made, the am bient temperature shall be determined by at least three thermocouples, or thermometers, spaced uniformly around the arc welding power source under test. They shall be located at approximately one half th...
- 6.6 COOLING AIR TEMPERATURE DURING TESTS [Go to Page]
- Temperature tests shall be made at any cooling air temperature, preferably not below 100C. It shall be as sumed that the temperature rise is the same for all cooling air temperatures between the limits of l<> C and 40 C.
- A temperature test shall not .be required when a record of test made on a duplicate unit in accordance with these standards can be furnished.
- OF SHUTDOWN [Go to Page]
- Whenever a sufficient time has elapsed between the instant of shutdown and the time of fmal temperature measurement to permit the temperature to fall, suitable corrections shall be applied so as to obtain as nearly as practicable the temperature at th...
- 6.9 $TOPPING GENERATOR-TYPE POWER SOURCES. FOR TEMPERATURE TESTS [Go to Page]
- Precautions shall be taken to shorten the stopping period of generator-typearcwelding power sources and to maintain the temperature during the stopping period. It is recommended that means be used to limit the stopping and measuring period to a value ...
- 7.1 HIGH POTENTIAL TESTS
- 7.2 TESTVOLTAGE
- 7.3 DURATION OF APPLICATION OF TEST VOLTAGE
- 7.4 POINTS OF APPLICATION OF TEST VOLTAGE
- 7.5 TEMPERATURE AT WHICH HIGH POTENTIAL TESTS ARE TO BE MADE
- 7.6 HIGH POTENTIAL TEST PROCEDURE FOR COMPONENTS AND ACCESSORIES
- 7.7 PRODUCTION LINE HIGH POTENTIAL TESTING
- Section 8 [Go to Page]
- 8.1.1 Conditions for Test [Go to Page]
- 1. Input
- 2. Output
- 3. Temperature
- 4. Miscellaneous Losses [Go to Page]
- 8.1.2 Efficiency
- b. AC
- 9.5 NAMEPLATE MARKING
- 10.1 GENERAL
- 10.2 DEFINITIONS
- 10.2.2 High Frequency (HF)
- 10.2.3 High Frequency Stabilized Arc Welding (HFSAW)
- 10.2.4 Interference
- 10.2.5 Radiation
- 10.2.6 Welding Zone
- 10.3 HF CLASSIFICATION
- 10.3.2 HF Supplied _as a Separate Unit (HFAU)
- 10.3.3 Enclosure (HFPS or HFAU)
- 10.4 RADIO FREQUENCY RADIATION
- 10.4.2 Direct Radiation from the Power Source or HF Attachment UnH (HFAU)
- 10.4.3 Direct Radiation From the Welding Circuit
- PowerUne
- 10.4.5 Reradlatlon
- 10.5 GENERAL PRINCIPLES FOR INSTALLATION OF HIGH FREQUENCY STABILIZED ARC WELDING INSTALLATIONS
- 10.5.3 Shielding of Miscellaneous Wiring in the [Go to Page]
- 1o.5.4 Miscellaneous Conducting Materials In the Welding Zone
- 1o.5.4 Miscellaneous Conducting Materials In the Welding Zone
- 10.8 CERTIFICATION OF HFSAW INSTALLATIONS [Go to Page]
- 10.e.1 Introduction
- 10.e.2 On-site Certification
- 10.6.4 Test Procedure for Prototype Certification
- Figure 10-1
- 10.6.5 Data Requirements and Umtts [Go to Page]
- 10.6.6 Interference [Go to Page]
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