1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULSEPTEMBER 3, 20141UL 1836Outline of Investigation for Electric Motors and Generators for Use in ClassI, Division 2, Class I, Zone 2, Class II, Division 2 and Zone 22 Hazardous(Classified) Locatio
2、nsIssue Number: 5September 3, 2014Summary of TopicsThis Fifth issue of the Outline of Investigation for Electric Motors andGenerators for Use in Class I, Division 2, Class I, Zone 2, Class II, Division2 and Zone 22 Hazardous (Classified) Locations, UL 1836, is beingpublished to include revisions to
3、Annex A.Both the third and fifth issues are active and effective on their date of publication.The fifth issue includes harmonization with the UL 1004-1 series of standards. Assuch, there is no requirement to revise motors currently certified to issue three.ULs Outlines of Investigation are copyright
4、ed by UL. Neither a printed norelectronic copy of an Outline of Investigation should be altered in any way. All ofULs Outlines of Investigation and all copyrights, ownerships, and rights regardingthose Outlines of Investigation shall remain the sole and exclusive property of UL.COPYRIGHT 2014 UNDERW
5、RITERS LABORATORIES INC.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULSEPTEMBER 3, 2014UL 18362No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULCONTENTSINTRODUCTION1
6、 Scope .42 General 43 Components 44 Units of Measurement .55 Undated References 5CONSTRUCTION6 General 56.1 General .56.2 Class I 56.3 Class II 67 Supply Connections .68 External Fans and Fan Guards .6PERFORMANCE9 Tests 79.1 General .79.2 All motors .89.3 Variable-frequency inverter-drive motors .89
7、.4 Ambient temperatures .89.5 Temperature measurements .810 Temperature Test 911 Maximum surface temperatures 1012 Test for accumulation of static electricity on nonmetallic fans and fan guards 11MARKING13 General 11APPENDIX A (informative)Motor Bearing Sparking - Discharge Energy CalculationSEPTEMB
8、ER 3, 2014 UL 1836 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULINTRODUCTION1 Scope1.1 These requirements cover electric motors and generators for use in hazardous (classified) locationsin accordance with the National Electrical Code, NFPA
9、 70, as follows: Class I, Division 2; Class I, Zone 2; Class II, Division 2; Class III, Division 1 and 2; and Zone 22.1.2 These requirements cover both horizontal and vertical machines that have fractional and integralhorsepower ratings.1.3 These requirements do not cover intrinsically safe motors.2
10、 General2.1.1 When the term motor is employed in the following text, it is understood that the requirement alsoapplies to a generator.3 Components3.1 Except as indicated in 3.2, a component of a product covered by this Outline of Investigation shallcomply with the requirements for that component.3.2
11、 A component is not required to comply with a specific requirement that:a) Involves a feature or characteristic not required in the application of the component in theproduct covered by this Outline of Investigation; orb) Is superseded by a requirement in this Outline of Investigation.3.3 A componen
12、t shall be used in accordance with its rating established for the intended conditions ofuse.3.4 Specific components are incomplete in construction features or restricted in performance capabilities.Such components are intended for use only under limited conditions, such as certain temperatures notex
13、ceeding specified limits, and shall be used only under those specific conditions.SEPTEMBER 3, 2014UL 18364UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL4 Units of Measurement4.1 Values stated without parentheses are the requirement. Values i
14、n parentheses are explanatory orapproximate information.5 Undated References5.1 Any undated reference to a code or standard appearing in the requirements of this Outline ofInvestigation shall be interpreted as referring to the latest edition of that code or standard.CONSTRUCTION6 General6.1 General6
15、.1.1 This Outline supplements and modifies the requirements of the Standard for Rotating ElectricMachines - General Requirements, UL 1004-1. Motors and Generators shall comply with the constructionrequirements of this standard. If a requirement of this Outline of Investigation conflicts with a requi
16、rementof UL 1004-1, the requirement of this Outline of Investigation takes precedence.6.2 Class I6.2.1 A motor for use in Class I, Division 2 or Class 1, Zone 2 locations shall be of the open or totallyenclosed type.6.2.2 A motor for use in Class I, Division 2 or Class I, Zone 2 locations shall be f
17、or use with alternatingcurrent (ac) only.Exception: A motor is also able to be used with direct current (dc) when it is:a) Brushless;b) Purged and pressurized in accordance with the Standard for Purged and PressurizedEnclosures for Electrical Equipment (National Fire Codes, vol. 7), NFPA/ANSI 496, ;
18、 orc) In an explosion-proof enclosure in accordance with the Standard for Electric Motors andGenerators for Use in Division 1 Hazardous (Classified) Locations, UL 674.6.2.3 Arcing or sparking parts shall comply with the requirements specified in one of the following:a) Standard for Electric Motors a
19、nd Generators for Use in Division 1 Hazardous (Classified)Locations, UL 674.b) Standard for Explosion-Proof and Dust-Ignition-Proof Electrical Equipment for Use inHazardous (Classified) Locations, UL 1203.c) Standard for Nonincendive Electrical Equipment for Use in Class I and II, Division 2 andClas
20、s III, Divisions 1 and 2 Hazardous (Classified) Locations , ANSI/ISA-12.12.01-2013.d) Standard for Explosive Atmospheres - Part 15: Equipment Protection by Type of Protectionn, UL 60079-15.SEPTEMBER 3, 2014 UL 1836 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHO
21、UT PERMISSION FROM ULe) Standard for Explosive Atmospheres - Part 31: Equipment Dust Ignition Protection byEnclosure t, UL 60079-31.f) Constructed with current-interrupting contacts immersed in oil.g) Located in a purged and pressurized enclosure in accordance with NFPA 496 or theStandard for Explos
22、ive Atmospheres - Part 2: Equipment Protection by Pressurized Enclosuresp, UL 60079-2.h) Is a sliding contact shaft bonding device used for the purpose of maintaining the rotor atground potential, only in the case where the ungrounded shaft voltage and capacitance arebelow the ignition curves shown
23、in Figure A1 or below the calculated value of minimum ignitionenergy shown in Table A.1 of Annex A.6.3 Class II6.3.1 A motor for use in Class II, Division 2 or Zone 22 locations shall be of the totally enclosed type.6.3.2 A sliding contact shaft bonding device used for the purpose of maintaining the
24、 rotor and stator atthe same potential to ground shall be permitted to be unenclosed when determined to comply with therequirements for maximum discharge energy or maximum voltage and capacitance for Group IIA andGroup D.7 Supply Connections7.1 A motor shall have provision for connection to threaded
25、 rigid metal conduit or other wiring methodsin accordance with Article 501, 502, 503, 505, or 506 in the National Electrical Code, NFPA 70 as isappropriate for the intended use.8 External Fans and Fan Guards8.1 The external fan on a fan-cooled motor shall be mounted with clearances that reduce the r
26、isk ofcontact between revolving and stationary parts.8.2 An external metallic fan shall be constructed of brass or aluminum, with a hardness not exceedingRockwell B66.8.3 An external nonmetallic fan or guard shall comply with the requirements in Tests on Nonmetallic Fansand Fan Guards, Section 12.8.
27、4 Unless the fan of a fan-cooled motor is provided with a guard, as specified in 8.5 and 8.6, thatprotects against unintentional contact with blades, spokes, or other irregular surfaces of the fan or shaft,it shall be marked as specified in 13.3.8.5 For the purpose of these requirements, a guarded,
28、fan-cooled motor is one in which all openingsgiving direct access to the fan are limited in size by the design of the structural parts, or by screens, grills,expanded metal, and similar components.SEPTEMBER 3, 2014UL 18366UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION
29、 WITHOUT PERMISSION FROM UL8.6 An opening in a guard or an opening between the guard and the motor that prevents entrance of a3/4 inch (19.1 mm) diameter rod meets the intent of the requirement when a probe as illustrated in Figure8.1 is unable to touch any moving part other than a smooth shaft when
30、 inserted through the opening.Exception: An opening in a guard or an opening between the guard and the motor is able to be greaterthan 3/4 inch (19.1 mm) wide, and not greater than 1-1/2 inches (38.1 mm) wide, when the width is notmore than one-eighth of the distance to the nearest moving part other
31、 than a smooth shaft.This is generated text for figtxt.PERFORMANCE9 Tests9.1 General9.1.1 This Outline supplements and modifies the requirements of the Standard for Rotating ElectricMachines - General Requirements, UL 1004-1. Motors and Generators shall comply with the testrequirements of UL 1004-1.
32、 If a requirement of this outline of investigation conflicts with a requirement ofUL 1004-1, the requirement of this outline of investigation takes precedence.Figure 8.1Probe for fan guardsSEPTEMBER 3, 2014 UL 1836 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHO
33、UT PERMISSION FROM UL9.2 All motors9.2.1 Representative samples shall comply with the applicable tests described in the Standard forRotating Electric Machines - General Requirements, UL 1004-1.9.3 Variable-frequency inverter-drive motors9.3.1 A motor intended for use with variable-frequency inverter
34、 drives shall comply with the requirementsin the Standard for Rotating Electric Machines - General Requirements, UL 1004-1:a) Throughout the marked frequency range; andb) When tested with each type of inverter with which the manufacturer specifies that the motoris to be used; for example, voltage-so
35、urce inverter (VSI), current source inverter (CSI), andpulse width modulated inverter (PWM).Exception: Testing with each type of inverter is not required when it is determined that testing with onetype of inverter is also representative of operation with another type or types of inverter.9.4 Ambient
36、 temperatures9.4.1 Except as noted in 9.4.2 and 9.4.3, the tests are able to be conducted at any ambient temperaturein the range of 10 40C (50 104F). Maximum temperatures measured in a test conducted in anambient less than 40C are to be increased by the amount of the difference between the test ambi
37、ent and40C.9.4.2 A motor that is rated for an ambient higher than 40C (104F) is able to be tested at an ambientbetween 10C (50F) and rated ambient with the measured temperature increased by the amount of thedifference between the test ambient and rated ambient.9.4.3 A motor provided with a temperatu
38、re indicating and regulating device shall be tested at 40 5C(104 9F), or, when rated for an ambient higher than 40C, at rated ambient 5 degrees. The measuredtemperature is to be adjusted to rated ambient.9.5 Temperature measurements9.5.1 Temperatures are to be measured by thermocouples, the resistan
39、ce method, or another methoddetermined to comply with the requirement. The temperature recording system shall have an accuracy of3C or less.9.5.2 Thermocouples, when used, are to consist of wires not larger than 24 AWG (0.21 mm2) and notsmaller than 30 AWG (0.05 mm2). When thermocouples are used in
40、determining temperatures in electricalequipment, it is common practice to employ thermocouples consisting of 30 AWG iron and constantanwire and a potentiometer-type instrument. Such equipment is to be used whenever referee temperaturemeasurements by thermocouples are required.SEPTEMBER 3, 2014UL 183
41、68UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL9.5.3 The thermocouple junction and the adjacent thermocouple lead wire are to be securely held inthermal contact with the surface of the material the temperature of which is being measured.10
42、Temperature Test10.1 A motor shall be operated as described in 10.2. The maximum temperature attained shall be usedfor the basis of the marked operating temperature or temperature class number.10.2 A continuous-duty motor is to be connected to a generator, dynamometer, or other loadingequipment. The
43、 motor is to be operated at the test potential specified in Table 10.1 and at full-rated loador service-factor load, when so marked, until thermal equilibrium occurs. For an intermittent-duty motor,the motor is to be operated at the test potential specified in Table 10.1 at full-rated load or servic
44、e-factorload, when so marked, and at the rated duty cycle until the maximum temperatures are attained. Ashort-time duty motor is to be operated at full-rated load or service-factor load, when so marked, for therated-duty time. A torque motor is to be operated under locked-rotor conditions.10.3 With
45、regard to the requirements in 10.2, full-rated or service-factor load is determined to exist whenthe motor is loaded to at least:a) For a motor other than service-factor duty motor:1) Rated horsepower; and2) Rated full-load amperes;b) For a service-factor duty motor:1) Rated horsepower times service
46、 factor; and2) Rated full-load amperes times service-factor;c) For a line of motors, as specified in (a) or (b), as applicable, or higher when required toattain rated temperature rise on the windings.10.4 Immediately following operation of the motor as specified in 10.2, an internal space heater, wh
47、enprovided, is to be operated at the test potential specified in Table 10.1 until thermal equilibrium occurs. Toapply the table, the voltage rating of the space heater circuit is to be substituted for the voltage rating ofthe motor.SEPTEMBER 3, 2014 UL 1836 9UL COPYRIGHTED MATERIAL NOT AUTHORIZED FO
48、R FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULTable 10.1Voltage for testsVoltage rating of motor/space heateraTest potential, voltsb110 120 ac 120 ac110 125 dc 125 dc208 ac 208 ac220 240 ac 240 ac220 250 dc 250 dc265 277 ac 277 ac440 480 ac 480 ac550 600 ac 600 acaWhen the rating o
49、f the motor does not fall within any of the specified voltage ranges or is more than 600 volts, it is to betested at 100 105 percent of its rated voltage.bThese test potentials are based on a 60 hertz supply. When the rating of the motor is other than 60 hertz, the test voltageshall be rated voltage at that frequency.10.5 A thermostat, thermal protector, or other temperature indicating or regulating device, when provided,shall not open during this test.10.6 During the temperature tests, the temperatures of the motor windings shall
