1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULJULY 22, 20141UL 2872Outline of Investigation for Heat Detecting Circuit InterruptersIssue Number: 1July 22, 2014Summary of TopicsThis first issue of the Outline of Investigation for Heat Detecti
2、ng CircuitInterrupters, UL 2872, covers heat detecting circuit-interrupters (HDCI)intended for use in dehumidifiers, room air conditioners and otherrefrigeration equipment.ULs Outlines of Investigation are copyrighted by UL. Neither a printed norelectronic copy of an Outline of Investigation should
3、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 UNDERWRITERS LABORATORIES INC.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTI
4、ON ORDISTRIBUTION WITHOUT PERMISSION FROM ULJULY 22, 2014UL 28722No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULCONTENTSINTRODUCTION1 Scope .42 Glossary 43 Components 54 Units of Measurement .55 Undated References 5CONSTRU
5、CTION6 General 57 Temperature Sensor Assembly .68 Operating Mechanism .7PERFORMANCE9 General 710 Temperature Calibration-Verification Test .711 Drop Test .812 Humidity Conditioning 813 Leakage Current Measurement 914 Environmental Test Sequence 915 Open Lead Test .916 Overvoltage, Overload and Endur
6、ance Tests 917 Resistance to Environmental Noise Test .1018 Supplemental Voltage Surge Immunity Test 10RATINGS19 General 10MARKINGS20 General .10APPENDIX AStandards for ComponentsA1JULY 22, 2014 UL 2872 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSIO
7、N FROM ULINTRODUCTION1 Scope1.1 These requirements cover heat detecting circuit-interrupters (HDCI) intended for use in dehumidifiers,room air conditioners and other refrigeration equipment. They incorporate the functionality of a leakagecurrent detector interrupter, and are intended to interrupt po
8、wer to the protected device when any of thefollowing conditions occur:a) An overheating condition occurs where the HDCI temperature sensor is mounted in the endproduct, orb) When leakage currents flowing from the conductors of the end products power supply cordexceed a predetermined level, orc) An o
9、pen circuit occurs in one of the temperature sensor leads of the HDCI temperaturesensor.1.2 These devices have a maximum rating of 40 A, and are intended for use on circuits rated 250 Vacmaximum.1.3 These requirements are intended to be used with the requirements of the Standard for Arc-FaultCircuit
10、-Interrupters, UL 1699 as these requirements modify and supplement the requirements of thatStandard.1.4 An HDCI that is also intended to perform other functions, such as overcurrent protection, ground-faultcircuit-interruption, surge suppression, any other similar functions, or any combination there
11、of, shallcomply additionally with the requirements of the applicable Standard(s) that cover devices that providethose functions.2 Glossary2.1 For the purposes of this Outline of Investigation, the following definitions apply. Additional definitionsare in the glossary of the Standard for Arc-Fault Ci
12、rcuit-Interrupters, UL 1699, including the glossary ofSupplement SB.2.2 HEAT DETECTING CIRCUIT-INTERRUPTER (HDCI) A cord mounted device that incorporatesthe functionality of a leakage current detector interrupter (LCDI), and interrupts the circuit to theprotected refrigeration device when any of the
13、 following conditions occur:a) An overheating condition occurs where the HDCI temperature sensor is mounted in the endproduct, orb) When leakage currents flowing from the conductors of the power supply cord of theprotected device exceed a predetermined level, orc) An open circuit occurs in one of th
14、e temperature sensor leads to the HDCI temperaturesensor.2.3 TEMPERATURE SENSOR ASSEMBLY An assembly consisting of a temperature sensingcomponent, wiring, a securement means and other components necessary to sense the temperature ofthe compressor of a protected product and cause the HDCI to interrup
15、t the circuit.JULY 22, 2014UL 28724UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL3 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 compone
16、nt.3.2 A component need not comply with a specific requirement that:a) Involves a feature or characteristic not needed 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 component shal
17、l be used in accordance with its rating established for the intended conditions ofuse.3.4 Specific components are recognized as being incomplete in construction features or restricted inperformance capabilities. Such components are intended for use only under limited conditions, such ascertain tempe
18、ratures not exceeding specified limits, and shall be used only under those specific conditionsfor which they have been recognized.4 Units of Measurement4.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory orapproximate information.5 Undated References5.1 A
19、ny 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 An HDCI shall comply with the applicable construction requirements in Sections 6 15, 26 2
20、7, 31 33 and SB3 SB5 of the Standard for Arc-Fault Circuit-Interrupters, UL 1699, as modified orsupplemented by the construction requirements of this Outline.JULY 22, 2014 UL 2872 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL7 Temperature
21、Sensor Assembly7.1 A thermostat used as a temperature sensor shall comply with the Standard for Temperature-Indicating and Regulating Equipment, UL 873. Compliance with UL 60730-1 and the applicable Part 2Standard from the UL 60730 series fulfills these requirements.7.2 A temperature sensing positiv
22、e temperature coefficient (PTC) or negative temperature coefficient(NTC) thermistor used as a temperature sensor shall comply with the Standard for Thermistor-TypeDevices, UL 1434.7.3 A temperature sensor assembly shall be provided with a means for securement to the protecteddevice. Bolts, screws, o
23、r other parts provided for mounting the temperature sensor assembly to theprotected device shall be independent of those used to secure the components of the temperature sensorassembly.7.4 A means provided for factory calibration of a temperature sensor assembly shall be factory-securedto restrict u
24、nintentional shifting after calibration.7.5 A means for calibration of a temperature sensor assembly that is accessible or apparent shall bemodified, guarded, or sealed by a means such as soldering to effectively restrict manipulation by hand oran ordinary tool subsequent to factory calibration.7.6
25、A base for the support of a live part of a temperature sensor assembly shall be of noncombustible,moisture-resistant, insulating material.7.7 Insulating material of a temperature sensor assembly, including a barrier between parts of oppositepolarity, shall be rated for the application.7.8 Vulcanized
26、 fiber may be used for an insulating bushing, a washer, a separator, or a barrier, but notfor the sole support of an uninsulated live part.7.9 Polymeric electrical insulating materials and polymeric enclosures of a temperature sensor assemblyshall comply with the applicable requirements of the Stand
27、ard for Polymeric Materials Use in ElectricalEquipment Evaluations, UL 746C. The materials shall have the appropriate flammability class required byUL 746C based on the equipments intended use. The material flammability class is determined by testsin the Standard for Tests for Flammability of Plasti
28、c Materials for Parts in Devices and Appliances, UL 94.JULY 22, 2014UL 28726UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL8 Operating Mechanism8.1 In addition to the requirements of Section 13 of UL 1699, an HDCI shall be constructed such th
29、at anopen circuit in one or more of the leads of the temperature sensor shall result in interruption of the supplyto the protected device. Compliance is determined by the open lead test of Section 15 of this Outline.PERFORMANCE9 General9.1 An HDCI shall comply with the performance requirements for a
30、n LCDI as detailed in Sections SB6 SB11 of UL 1699, except as noted in 9.2.9.2 Performance requirements referenced from UL 1699 shall be performed as modified andsupplemented by the requirements of this Outline of Investigation10 Temperature Calibration-Verification Test10.1 The actuation temperatur
31、e of an HDCI, when tested at temperatures consistent with its ratings, shallnot exceed its rated set point temperature by:a) 6C (10F) for ratings up to 150C (300F);b) 4 percent of its set-point temperature for ratings above 150C (300F) and up to 200C(390F);c) 5 percent of its set-point temperature f
32、or ratings above 200C (390F); andd) Not exceed the as-received actuation temperature when tested following the conditioningtests specified in 10.3 by whichever is greater:1) More than 5 percent of the maximum set-point temperature, or2) More than 6C (10F).10.2 The calibration-verification test on an
33、 HDCI shall be performed on representative productionsamples that have been produced and calibrated within the same tolerances permitted in factoryproduction.10.3 Five samples shall be subjected to the calibration-verification test in an as received condition. Thosefive samples shall be additionally
34、 subjected to the following test sequences:a) The first sample shall be subjected to the drop, humidity, leakage current, environmental testsequence and arc fault detection tests described in UL 1699. The calibration-verification testshall be repeated on that sample prior to performing the dielectri
35、c withstand test required by UL1699.b) The second sample shall be subjected to the overvoltage, overload, and endurance testsdescribed in UL 1699. The calibration-verification test shall be repeated on that sample prior toperforming the dielectric withstand test required by UL 1699.JULY 22, 2014 UL
36、2872 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULc) The third sample shall be subjected to the resistance to environmental noise test sequencedescribed in Sections SB10 and 44 of UL 1699. The calibration-verification test shall berepeated
37、 on that sample following the point contact arc detection test performed after exposureto environmental noise, as required by UL 1699.d) The fourth and fifth samples shall be subjected to the supplemental voltage surge immunitytest described in Sections SB11 and 60 of UL 1699. The calibration-verifi
38、cation test shall berepeated on those samples following the point contact arc detection test performed after thesupplemental voltage surge immunity test, as required by UL 1699.10.4 The temperature sensor assembly of the HDCI is to be mounted on a 1/8 inch thick metal plateplaced in an air oven havi
39、ng forced circulation of at least 100 feet (30.5 m) per minute, and designed soas to nullify the effects of radiation. A thermocouple is to be attached to the metal plate adjacent to thetemperature sensor assembly. An additional thermocouple shall be located in air adjacent to thetemperature sensor
40、assembly to monitor the ovens air temperature. The HDCI shall be connected to asource of rated voltage and to rated load.10.5 Prior to calibration verification, uniform temperatures of all parts in the chamber are to be maintainedby holding the temperature approximately 20C (35F) below the set point
41、 until conditions of equilibriumhave been established. The temperature is then to be raised at a rate of not more than 0.5C (1.0F) perminute until the device opens the circuit. The temperature of the thermocouple attached to the metal plateadjacent to the temperature sensor assembly is to be recorde
42、d. The actuation temperature is to bedetermined from the average of the temperatures recorded during five trials.11 Drop Test11.1 When conducting the drop test of Section 35.3 of UL 1699, the entire HDCI, including thetemperature sensor assembly shall be subjected to the drop test. The sample used s
43、hall be the firstsample subjected to the as received Temperature Calibration-Verification Test. See 10.3(a).12 Humidity Conditioning12.1 When conducting the humidity conditioning of Section 36 of UL 1699, the entire HDCI, including thetemperature sensor assembly, shall be placed in the test chamber.
44、 The sample used shall be the firstsample subjected to the as received Temperature Calibration-Verification Test. See 10.3(a).JULY 22, 2014UL 28728UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL13 Leakage Current Measurement13.1 When conducti
45、ng the leakage current measurement of Section 37 of UL 1699, the entire HDCI,including the temperature sensor assembly shall be subjected to the leakage current measurement. Thesample used shall be the first sample subjected to the as received Temperature Calibration-VerificationTest. See 10.3(a).14
46、 Environmental Test Sequence14.1 When conducting the environmental test sequence of Section 39 of UL 1699, the entire HDCI,including the temperature sensor assembly shall be placed in the environmental chamber. The sampleused shall be the first sample subjected to the as received Temperature Calibra
47、tion-Verification Test. See10.3(a).15 Open Lead Test15.1 One new sample shall be subjected to this test. The output leads of the device shall be connectedto a suitable indicator such as a light or buzzer to indicate when the device interrupts its output power. Aswitch shall be connected in series wi
48、th one lead of the HDCI temperature sensor. The HDCI shall beplugged into a source of rated voltage. The test button shall be actuated to verify the functionality of thedevice. The device shall then be reset and the switch opened. The device shall interrupt power to theindicator light when the switc
49、h is opened.15.2 The test of 15.1 shall be repeated with the switch moved to each lead of the HDCI temperaturesensor in turn until all leads have been tested.15.3 The same sample shall then be modified by disconnecting all of the temperature sensor leads. Theoutput leads shall be connected to a suitable indicator light and the HDCI plugged into a source of ratedvoltage. The HDCI shall either trip as soon as voltage is applied or shall not close the circuit to theindicator light. The device shall not be capable of being reset or shall trip each ti
