1、1-24Class 2 Power Units -UL 1310 (5th Edition)(Dated May 3, 2005, Last Revise Date Jan. 31, 2006)-CAN/CSA-C22.2 No. 223-M91 (2nd Edition)(Dated June 1991)Agenda(大綱) Scope (范围) Class 2 Definition (Class 2 定义) Key Construction Requirements (结构要求重点) Enclosure/Protective Devices/Coil Insulation/Input Co
2、nnections/Output Connections/Accessibility of Live Parts/Separation of Circuits/Grounding/Spacing(外壳/保护装置/变压器绝缘/输入连结/输出连结/带电体可接触性 /线路隔离/ 间距) Key Performance Requirements (测试要求重点) Electrical Tests (电气测试 ) Mechanical Tests (机构测试) Caution Marking and is not greater 30 V rms and 42.4 V peak; For DC Syst
3、ems - If the product exceeds the 30 V for continuous dc The product shall be marked as below:US “Class 2 not wet,” “Class 3 wet”Canada “Class 2 not wet,” “Class 1 wet”Max. O/P current for inherently limited units (先天限制的) (30.1)Max. nameplate ratingsCircuit voltage (Vmax) a,b ac or dc Volts V-A Amper
4、esMax. o/p current(I max)c, amperes0 20Over 20 to 30Over 30 to 60, dc only5.0 X V max1001005.0100/Vmax100/Vmax8.08.0150/Vmaxa V max : Maximum output voltage regardless of load with rated input voltage applied.b Voltage ranges shown are for sinusoidal alternating current and continuous direct current
5、. For nonsinusoidal alternating current, maximum voltage shall not be greater than 42.4 volts peak. For direct current interrupted at a rate of 10 200 hertz, maximum voltage shall not be greater than 24.8 volts.c I max is maximum output current regardless of load.The maximum output volt-amperes shal
6、l not be more than 100 volt-amperes (最大输出不得超过 100VA)Max. O/P current and VA for not inherently limited units (非先天限制的) (Cl30.2)3-24Max. nameplate ratingsCircuit voltage (Vmax) a,b ac or dc Volts V-A AmperesMax. o/p current(I max)c, amperesMax. o/p VA(VA max)dMax. overcurrent protection rating, A0 20O
7、ver 20 to 30Over 30 to 60, dc only5.0 X Vmax1001005.0100/Vmax100/Vmax1000/Vmax1000/Vmax1000/Vmax250e2502505.0100/Vmax100/Vmaxa V max is the maximum output voltage regardless of load with rated input voltage applied.b Voltage ranges shown are for sinusoidal alternating current and continuous direct c
8、urrent. For nonsinusoidal alternating current, maximum voltage shall be greater than 42.4 volts peak. For direct current interrupted at a rate of 10 200 hertz, maximum voltage shall not be greater than 24.8 volts.c I max is maximum ampere output regardless of load after operation as specified in 30.
9、2.1.d VA max is maximum volt-ampere output regardless of load after operation as specified in 30.2.1.e Maximum volt-amperes is 350 if maximum circuit voltage is 15 or less.Construction (結構)Mechanical Assembly-Direct Plug-In (机构组立- 插墙式) (Cl7.11)4-24Mechanical Assembly-Direct Plug-In (机构组立- 插墙式)(7.16)
10、Determination of perimeter of units with rounded edgesA = 5.1 mm for UL (Marking for Mounting(固定件)Tab)A = 8.0 mm for CUL (No Mounting Tab)If a mounting tab be provided, the following conditions shall be met:a) Use on a or 15-ampere, 125- 250-volt receptacle (NEMA 1-15R or 5-15R or 6-15 R);b) A screw
11、 No. 6 mounting screw (3.5 mm major diameter, 32 threads/inch) is provided and constructed to secure to a duplex (双方的) receptacle that has a center screw;c) For a unit without a grounding pin, the mounting tab is constructed to be mounted to both grounding and non-grounding receptacles; andd) Marked
12、 “CAUTION” and the following or the equivalent:1) “Risk of Electric Shock Disconnect power to the receptacle before installing or removing the unit. When removing receptacle cover screw, cover may fall across plug pins or receptacle may become displaced;”2) “Use only with duplex receptacle having ce
13、nter screw;” and3) “Secure unit in place by receptacle cover screw”Metal Enclosure (金属外壳 )Indoor use: A sheet metal thickness not less than that in Table 8.1. The thickness of sheet metal other than steel or aluminum shall not be less that than in Table 8.1 for uncoated steel (8.4) Iron and steel pa
14、rts shall be protected against corrosion (抗蚀) by galvanizing (镀锌), plating (电镀), enameling (上釉 ), or other equivalent means if the corrosion (侵蚀)of such unprotected parts results in a risk of fire, electric shock, or injury to persons (9.1)5-24Outdoor use: A type 3R, 3S, or 4X enclosure evaluated wi
15、th UL 50 (CCN: CYIV or BGUZ), is not required to be subjected to the Rain Test (56.1) A metallic enclosure shall be protected against corrosion (57.5) Copper, bronze(青铜), and brass(黄铜) containing no less than 80 percent copper, or stainless steel may be used without additional protection against cor
16、rosion (57.6)Enclosure (塑料外壳 )Indoor use: UL: Flammability (燃烧等级 ):Min. V-2 (UL 94)CUL: Flammability: Min. V-1 (UL 94) Resistance to arcing properties: UL 746C Moisture absorptive propertiesOutdoor use: A type 3R, 3S, or 4X enclosure evaluated with UL 50 (CCN: CYIV or BGUZ), is not required to be su
17、bjected to the Rain Test An enclosure of a unit shall be constructed to reduce the risk of electric shock due to weather exposure and shall prevent live parts, electrical components, or wiring (not identified (鉴别)for use while in contact with water) from becoming wet6-24Protective Devices (保护装置) The
18、 protective device may be located in either the primary or secondary circuit (可在初级或次级线路 ) Type of protective device: Thermostat, Thermal Cutoff, Positive Temperature Coeffecient (PTC) Resistor, Negative Temperature Coeffecient (NTC) Resistor, Fuse, Eutectic Material (双合金材料 ) An protective device sha
19、ll not open when delivering its rated output (正常额定输出时, 保护装置不可做动) A protective device for a not inherently limiting Class 2 power unit shall not be of the automatic reclosing type(自动恢复式) and shall be rated with Table 30.2 and provided in secondary circuitCoil Insulation (变压器线圈绝缘) Any type or thicknes
20、s of insulation may be used if the coil withstands the induced potential test (13.2.8.b) Tape used as insulation in lieu of (代替)spacing shall provide a continuous 1/32 inch (0.8 mm) minimum wide bent up edge against the bobbin flanges (使用胶带当绝缘以抵押间距要求则须提供至少 0.8 mm 宽的反折) (13.2.3)A flanged, bobbin-woun
21、d transformer shall be subjected to the output loading test continued for 15 days if the transformer has: The primary winding wound over the secondary winding or the secondary winding wound over the primary winding; and The primary winding insulated from the secondary winding by a layer of insulatin
22、g material other than coil form/bobbinThe test is not required to be applied for 15 days if the following requirements are met: Multiple layered winding wire UL 746A, UL 746B, UL 746C Meet spacing requirement Table 24.1, Table 24.2 Alternate spacing UL 840 Triple insulated wiring Subject 2353 (OBJT2
23、)7-24Input Connection (输入连结)Multiple Voltage Rated Power Unit (多输入电压电源适配器)Definition (定义):A power unit with a rated voltage range (such as 100 240 volts) or more than one discrete voltage rating (such as 120/240 volts)Intended for Use By Travellers (旅行者用电源适配器)Definition (定义): (14.1.4)A multiple volt
24、age rated direct plug-in power unit with a 125 V, 15 A (parallel) input blade configuration, or a multiple voltage rated cord-connected power unit with a non-detachable power supply cord terminating in a 125 V, 15 A (parallel) blade plugRequirements for Intended for Use By Travellers (旅行者用电源适配器的要求 )
25、: (14.1.4)a) The blade assembly shall be a 125 volt, 15 amp configuration(构造); b) The power unit shall employ a user adjustable (可调整的)voltage selector and comply with Switch Position Test, or be capable of operating at different voltages without user adjustment;c) The input voltage rating shall incl
26、ude nominal 120 volt;d) The power unit shall be marked as specified in 51.8; ande) The power unit shall be provided with instructions as specified in 54.4 A multiple voltage rated power unit intended for use by travelers shall be marked as follows with the following or equivalent: (51.8)a) “See inst
27、ruction manual for use in countries other than the U.S.A.“ orb) “See instructions for input voltage conversion.” orc) “See instructions if the input plug does not fit the power outlet” Instructions shall include (a) - (c) or the equivalent, as appropriate. The items shall be preceded by “IMPORTANT 8
28、-24SAFETY INSTRUCTIONS - SAVE THESE INSTRUCTIONS“ and “DANGER - TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, CAREFULLY FOLLOW THESE INSTRUCTIONS“ in letters of 1/8 inch (3.18 mm) high or in a readily visible contrasting text (54.4)a) “Be sure voltage selector is in correct voltage position before p
29、lugging in.“ The instructions shall also specify the procedures to follow for changing the voltage selectorb) “For use in the U.S.A., the voltage selector switch must be placed in the 120 volt position. For use in countries other than the U.S.A., the voltage selector may need to be placed in other t
30、han the 120 volt position. Confirm the voltage available at each country location before using the product“c) “For connection to a supply not in the U.S.A., use an attachment plug adapter of the proper configuration for the power outlet, if needed.“ or “If the shape of the plug does not fit the powe
31、r outlet, use an attachment plug adaptor of the proper configuration for the power outlet“Direct Plug-in Units (插墙式)Indoor use: Blade assembly meet UL 1681, UL 1310 par. 7.16 and 7.17 A direct plug-in unit employs a manually operated line connected single-pole switch or a fuse with an accessible con
32、tact, it shall employ a polarized- or grounding-type blade assembly (如有手动电压选择开关或可接触式保险丝, 则需是极性或有接地的 blade) (14.1) A direct plug-in unit employs folding or retractable blades for the input connectors, it shall comply with Direct Plug-in Security of Input Contacts Test (Blade Endurance Test for 6000 c
33、ycles) (44.2)Outdoor use: Brass containing of blades no less than 80 percent copper (57.6)Cord Connected Units (桌上型 )Indoor use: Table 14.1 and cord external length shall not be less than 6 feet (1.8 m) and not smaller than No. 18 AWG (14.2.1 充电器的输出线需带有接头或是接头附在外壳上) For CUL, permanently attached cord
34、 terminating in a connector shall be providedIndoor use:Output Wiring: Shall be stranded conductors(绞线) having insulation not less than 0.013 inch (0.33 mm) thick, and permanently attached to the output circuit. The wiring shall extend at least 6 feet (1.8 m) outside the unit (15.2.1) For a cord-con
35、nected unit (桌上型 ) with a minimum 6 feet (1.8 m) power-supply cord, the output flexible cord (permanently attached to the power unit or provided in the form of a separate cord set) shall be of any desirable length. The maximum combined length of the input and output cords shall not exceed 20 feet (6
36、.1 m) (15.2.2)Outdoor use:Output Wiring: Shall be suitable for outdoor use, “W” rated, and sunlight (UV) resistant (抗紫外线) as applicable to outdoor cords (60.1) For CUL, shall be of the type in Table 11 of the Canadian Electrical Code, Part I, and shall at least of the type SPT-2, PXWT or CXWT and su
37、itable for wet locationsOutput Wiring:Strain Relief Bushing (套管)be suitable for outdoor use and sunlight (UV) resistant (抗紫外线) (QMFZ2) with f2 code or (QMTT2)Output terminals:A terminal plate shall be not less than 0.030 inch (0.76 mm) thick, and shall provide not less than two full threads in the m
38、etal for the binding screw (15.3.1) (安上接线螺丝或螺栓的接线板应由黄铜或其它非铁金属，或镀钢制成， 厚度不少于0.030 吋 (0.76 毫米)，和在金属内应提供不少于两个完全的螺纹给接线螺丝使用。 A wire-binding screw shall not be smaller than No. 6 (3.5 mm diameter) and shall not have more than 32 threads per inch (25.4 mm) (15.3.2) A multi-output unit employing output termi
39、nals the output of which exceeds the current limit (inherently limited) with outputs interconnected shall be marked with “CAUTION” and “Risk of Fire. Use only Type SPT-2 or heavier cord, minimum 18 AWG copper” (15.3.4 and 52.12)Output connectors: A unit with multiple outputs where interconnection ex
40、ceeds Class 2 levels shall be provided with a polarized 10-24connector (15.4.1) Output connectors mounted on the enclosure and intended for direct connection of accessories shall be polarized if the output is direct-current or if multiple outputs are provided (15.4.2) Connectors normally used with c
41、oaxial cable shall not be used (15.4.5) USB can be as output connector by output shall not be more than 5 V dc, 500 mA Clips (夹子, 回形针) shall not be used as output connectorA battery charger shall be provided with a means to inhibit backfeed of current (反聩电流 ) which results in a risk of fire or elect
42、ric shock. The means of prevention shall protect each output and shall consist of any of the following: (15.4.3)a) A fuse, calibrated located in the output connector and rated to correspond with the maximum overcurrent protection ratingb) A diode or fixed impedance located in the output connector wh
43、ere it will limit backfeed currentc) An overcurrent protector equivalent to (a) located in the output connectord) An output cord equivalent to that specified in Table 14.1 with respect to insulating material and thicknessOutput connectors: Outdoor useMaterial of connector shall be QMFZ2 with f2 code
44、 (Ultraviolet Light Resistant)(抗紫外线) or QMTT2 suitable for outdoor use (Ultraviolet Light Resistant) (抗紫外线) Accessibility of Live Parts (带电体可接触性)Indoor use:Live parts other than exposed (暴露的) wiring terminals: (16.2) (通常指内部电路 )The test pin and articulate probe shall not contact: (16.2.1)a) A primary
45、 circuit; orb) Any live part with a voltage greater than the following with respect to ground or any other live part simultaneously accessible to the test pin or articulate probe1) 42.4 V peak for sinusoidal or nonsinusoidal AC2) 60 V for continuous DCThe test pin and articulate probe are to be appl
46、ied with a force not exceeding 1 pound (4.4 N) to determine whether the live parts are accessible (16.2.3)Outdoor use:The test pin and articulate probe shall not contact: (62.2)A primary circuit; orb) Any live part with a voltage greater than the following with respect to ground or any other live pa
47、rt simultaneously accessible to the test pin or articulate probe1) 15 V for sinusoidal AC a) and 21.2 V peak for nonsinusoidal AC2) 30 V for continuous DCExposed wiring terminals: (16.3.2)Indoor use:11-24The accessibility probe, shall not contact an exposed wiring terminal with a voltage greater (巨)
48、 大的 than the following with respect to ground or any other live part simultaneously accessible to the probea) 42.4 V peak for sinusoidal or nonsinusoidal ACb) 42.4 V for continuous DCThe accessibility probe is to be applied with a force not exceeding 5.62 pounds (25 N) to determine whether the expos
49、ed wiring terminals are accessible (16.3.3)Outdoor use:The accessibility probe, shall not contact an exposed wiring terminal with a voltage greater than the following with respect to ground or any other live part simultaneously accessible to the probe (62.2)a) 15 V for sinusoidal AC and 21.2 V peak for nonsinusoidal ACb) 30 V for continuous DCSeparation of Circuits (线路隔离)Unless provided with insulation rated for the highest voltage involved (有关的), insulated conductors of different circuits internal wiring
