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1、1-24 Class 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(大綱大綱) Scope (范围范围) Class 2 Definition (Class 2 定义定义) Key Construction Requirements (结构要求重点结构要求重点) Enclosure/Protective Devices/Coil In
2、sulation/Input Connections/Output Connections /Accessibility of Live Parts/Separation of Circuits/Grounding/Spacing (外壳外壳/保护装置保护装置/变压器绝缘变压器绝缘/输入连结输入连结/输出连结输出连结/带电体可接触性带电体可接触性 /线路隔离线路隔离/间距间距) Key Performance Requirements (测试要求重点测试要求重点) Electrical Tests (电气测试电气测试) Mechanical Tests (机构测试机构测试) Caution M
3、arking and is not greater 30 V rms and 42.4 V peak; For DC Systems - 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. n
4、ameplate ratings Circuit voltage (Vmax) a,b ac or dc Volts V-A Amperes Max. o/p current (I max)c, amperes 0 20 Over 20 to 30 Over 30 to 60, dc only 5.0 X V max 100 100 5.0 100/Vmax 100/Vmax 8.0 8.0 150/Vmax a V max : Maximum output voltage regardless of load with rated input voltage applied. b Volta
5、ge ranges shown are for sinusoidal alternating current and continuous direct current. 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
6、max is maximum output current regardless of load. The maximum output volt-amperes shall not be more than 100 volt-amperes (最大输出不得超过最大输出不得超过 100VA) Max. O/P current and VA for not inherently limited units (非先天限制的非先天限制的) (Cl30.2) 3-24 Max. nameplate ratings Circuit voltage (Vmax) a,b ac or dc Volts V-
7、A Amperes Max. o/p current (I max)c, amperes Max. o/p VA (VA max)d Max. overcurrent protection rating, A 0 20 Over 20 to 30 Over 30 to 60, dc only 5.0 X Vmax 100 100 5.0 100/Vmax 100/Vmax 1000/Vmax 1000/Vmax 1000/Vmax 250e 250 250 5.0 100/Vmax 100/Vmax a V max is the maximum output voltage regardles
8、s of load with rated input voltage applied. b Voltage ranges shown are for sinusoidal alternating current and continuous direct current. 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 vol
9、tage shall not be greater than 24.8 volts. c I max is maximum ampere output regardless of load after operation as specified in 30.2.1. 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 l
10、ess. Construction (結構結構) Mechanical Assembly-Direct Plug-In (机构组立机构组立-插墙式插墙式) (Cl7.11) 4-24 Mechanical Assembly-Direct Plug-In (机构组立机构组立-插墙式插墙式)(7.16) Determination of perimeter of units with rounded edges A = 5.1 mm for UL (Marking for Mounting(固定件固定件)Tab) A = 8.0 mm for CUL (No Mounting Tab) If a
11、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 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
12、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; and d) Marked “CAUTION” and the following or the equivalent: 1) “Risk of Electric Shock Disconnect power to the receptacle before installing or removing
13、 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 center screw;” and 3) “Secure unit in place by receptacle cover screw” Metal Enclosure (金属外壳金属外壳 ) Indoor use: A sheet metal thickness not
14、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 parts shall be protected against corrosion (抗蚀抗蚀)by galvanizing (镀锌), plating (电镀), enameling (上釉), or other equivalent means if the
15、 corrosion (侵蚀)of such unprotected parts results in a risk of fire, electric shock, or injury to persons (9.1) 5-24 Outdoor use: A type 3R, 3S, or 4X enclosure evaluated with UL 50 (CCN: CYIV or BGUZ), is not required to be subjected to the Rain Test (56.1) A metallic enclosure shall be protected ag
16、ainst corrosion (57.5) Copper, bronze(青铜青铜), and brass(黄铜黄铜) containing no less than 80 percent copper, or stainless steel may be used without additional protection against corrosion (57.6) Enclosure (塑料外壳塑料外壳) 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 properties Outdoor use: A type 3R, 3S, or 4X enclosure evaluated with UL 50 (CCN: C
