UL507文档格式.docx

1、Rated voltageInput test voltageTemperature test voltageBlade ignition test voltage110120191208210240254277440480550600Rated120208240277480600For nameplate rating other than one of those specified in the table,the motor is to be tested at 100105 percent of the rated voltage.However,consideration is t

2、o be given to the voltage of the intended source of supply for a motor.29 Leakage Current Test29.1 A cord-connected product rated for a nominal 240-volt or less supply shall be tested in accordance with 29.3-29.6.Leakage current shall not exceed: a） 0.5 milliampere for an ungrounded 2-wire product;

3、b） 0.5 milliampere for a grounded,3-wire,portable product;and c） 0.75 milliampere for a grounded,3-wire,product: 1） Employing a standard attachment plug rated 20 amperes or less; 2） Intended to be fastened in place or located in a dedicated space.29.2 Leakage current refers to all currents,including

4、 capacitively coupled currents,that may be conveyed between exposed conductive surfaces of an appliance and ground ot other exposed conductive surfaces of an appliance.29.3 All exposed conductive surfaces are to be tested for leakage currents.The leakage currents from these surfaces are to be measur

5、ed to the grounded supply conductor individually as well as collectively where simultaneously accessible.Parts are considered to be exposed surfaces unless guarded by an enclosure considered acceptable for reducing the risk of electric shock as defined in 9.1-9.5.Surfaces are considered to be simult

6、aneously accessible if they can be readily contacted by one or both hands of a person at the same time.These measurements do not apply to terminals operating at voltages that are not considered to involve a risk of electric shock.If all accessible surfaces are bonded together and connected to the gr

7、ounding conductor of the power-supply cord,the leakage current can be measured between the grounding conductor and the grounded supply conductor.29.4 If a conductive surface other than metal is used for the enclosure or part of the enclosure,the leakage current is to be measured using metal foil hav

8、ing an area of 10 by 20 centimeters （3.9 by 7.9 inches） in contact with the surface.If the surface has an area of less than 10 by 20 centimeters （3.9 by 7.9 inches）,the metal foil is to be the same size as the surface.The metal foil is not to remain in place long enough to affect the temperature of

9、the appliance.29.5 The measurement circuit for leakage current is to be as illustrated in Figure 29.1.The measurement instrument is defined in （a） （d）.The meter that is actually used for a measurement need not only indicate the same numerical value for a particular measurement as would the defined i

10、nstrument.The meter used need not have all the attributes of the defined instrument: a）The meter is to have an input impedance of 1500 ohms resistive shunted by a capacitance of 0.15 microfarad. b）The meter is to indicate 1.11 times the average of the full-wave rectified composite waveform of the vo

11、ltage across the resistor or current through the resistor. c）Over a frequency range of 0-100 kilohertz,the measurement circuitry is to have a frequency response ratio of indicated to actual value of current equal to the ratio of the impedance of a 1500-ohm resistor shunted by a 0.15-microfarad capac

12、itor to 1500 ohms.At an indication of 0.5 milliampere,the measurement is not to have an error of more than 5 percent at 60 hertz. d）Unless the meter is being used to measure leakage from one part of an appliance to another,the meter is to be connected between the accessible parts and the grounded su

13、pply conductor.29.6 A sample of the appliance is to be tested for leakage current in the as-received condition,without prior energization except as may occur as part of the production line testing,but with the grounding conductor,if any,open at the attachment plug.The supply voltage is to be adjuste

14、d to the applicable values specified in 33.1.8.The test sequence,with reference to the measuring circuit,Figure 29.1,is to be as follows. a）With the switch S1 open,the appliance is to be connected to the measuring circuit.Leakage current is to be measured using both positions of switch S2,and with t

15、he appliance switching devices in all their normal operating positions. b）Switch S1 is then to be closed,energizing the appliance,and within 5 seconds,the leakage current is to be measured using both positions of switch S2 and with the appliance switching devices in all their normal operating positi

16、ons. c）The leakage current is to be monitored until thermal stabilization.Both positions of switch S2 are to be used in determining this measurement.Thermal stabilization is to be obtained by operation as in the normal temperature test.29.7 Normally the complete leakage current test,as described in

17、29.6,is to be conducted without interruption for other tests.However,with the concurrence of those concerned,the leakage current test may be interrupted to conduct other nondestructive tests.Figure 29.1Leakage current measurement circuits30 Continuity of Grounding Circuit Test30.1 The resistance sha

18、ll be not more than 0.1 ohm between any point required to be grounded,as specified in 25.1.2,and: a）For an appliance intended for permanent electrical connection,the point on the enclosure at which the power-supply system will be connected. b）For a cord-connected appliance employing a grounding cond

19、uctor in the cord,the point to which the grounding conductor of the power-supply cord is connected.30.2 The resistance may be determined by any convenient method except that if unacceptable results are obtained,either a direct or alternating current equal to the current rating of the maximum-current

20、-rated branch-circuit overcurrent-protective device that may be employed with the appliance is to be passed from the equipment grounding terminal or the point of attachment of the wiring system to the dead metal part,and the resulting drop in potential is to be measured between these two points.The

21、resistance in ohms is determined by dividing the drop in potential in volts by the current in amperes passing between the two points.31 Starting Current Test31.1 When operated as described in 31.3,an appliance shall start and operate normally without: a）Tripping an overload protector provided as par

22、t of the appliance;or b）Opening the fuse,when connected to a circuit protected by a fuse as described in 31.2.31.2 The fuse mentioned in 31.1（b）is to be other than a time-delay type.The current rating of the fuse is to be equal to the current rating of the supply circuit of the lowest rating to whic

23、h the appliance is intended to be connected.Exception:A time-delay fuse may be employed,provided that the appliance is marked in accordance with 55.1.2 and:a） The construction of the appliance or the nature of its usage is such that it is likely to be used continually on the same branch circuit afte

24、r installation for example,a window fan,an attic ventilator,or the like;b） The appliance is of the household type that would normally be used on a 15- or 20- ampere branch circuit.31.3 To determine whether an appliance complies with the requirements in 31.1.the appliance is to be connected to a powe

25、r-supply circuit protected by a fuse as specified in 31.2 or in the exception to 31.2,whichever applies.The appliance is to be at room temperature at the beginning of the test.The appliance is to be started three times without tripping an overload protector provided as part of the appliance,or openi

26、ng the fuse protecting the supply circuit.Each start of the appliance is to be made under conditions representing the beginning of normal operation-the beginning of the normal operating cycle in the case of an automatic appliance.The motor of the appliance is to be allowed to come to full speed afte

27、r each start,and to come to rest between successive starts.31.4 An appliance employing a general use receptacle shall be loaded to the marked rating of the receptacle outlet.See 18.1832 Input Test32.1 The current input to an appliance shall be not more than 110 percent of the rated value when the ap

28、pliance is operated under conditions of intended service,when connected to a power-supply circuit of maximum rated voltage and rated frequency.33 Temperature Test33.1 All fans33.1.1 When tested as described in 33.1.3 33.2.2,an appliance shall not: a）Attain constant temperatures at any point on the f

29、an sufficiently high to cause a risk of fire; b）Cause deterioration of any materials employed in the appliance; c）Have constant temperature rises at specific points （particularly those surfaces that may be contacted by the user with the fan operating as intended） more than those specified in Table 3

30、3.1.（See 33.1.10.）33.1.2 A thermal protective device shall not operate during the temperature test.See 21.6.31.1.3 Coil and winding temperatures are to be measured by thermocouples located on exposed surfaces,except the change-in-resistance method may be used for a coil that is inaccessible for moun

31、ting of thermocouples,such as a coil: a）Immersed in sealing compound; b） Wrapped with thermal insulation; c） Wrapped with more than two layers of material such as cotton,paper,or rayon having a total thickness of more than 0.8 mm （1/32 inch）.In an alternating-current motor having a frame diameter of 177.80 mm （7 inches） or less,the thermocouple is to be mounted on the integrally-applied （enamel） insulation of the windings.33.1.4 Thermocouples are to consist of wires not larger than No.24 AWG.When thermocouple