电源开关指示问题

prod10

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一款座式搅拌机的开关控制电子板，分别带有档位指示情况，有疑问的是:在待机状态情况下是否需要灯光闪烁提示及电源启动开关装置，请指出出自哪个UL标准条款

H-RH

你说的应该属于 UL 982 Section 22.4 及 66.25.1 "with a stop position while energized"

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22.4 If a malfunction or breakdown of an electronic component, located in any circuit of the product, results in increased risk of injury to persons, such as a loss of OFF control or unexpected operation, that circuitry shall comply with the requirements in the Standard for Tests for Safety-Related Controls Employing Solid-State Devices, UL 991. A single malfunction is to be considered at a time.

Exception: An appliance employing exposed moving parts and electronic controls with a "STOP" position, where a single malfunction of a component can cause unexpected operation, shall be provided with a motor control OFF switch in accordance with 17.4 and be constructed with a red light which flashes only when the appliance is energized and when the motor is in a stop condition but not OFF. See also 66.25 and 70.32.

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66.25.1 Products employing exposed moving parts and electronic controls with a stop position while energized, and required to be provided with a      flashing light in accordance with the Exception to 22.4: ....

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即电源已经启动(energized), 但操作在 stop position, 要求闪烁之红灯(red flashing light)!

在 Certification Requirement Decision (2012-01-13) 又作了少许更改, 不一定要 red light:

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.... shall be provided with a motor control OFF switch in accordance with 17.4 and be constructed with a     light which flashes only when the appliance is energized and when the motor is in a stop condition but not OFF.

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1170127824

在待机状态下时需要灯光提示得的

C罗

已学习:):):):):)

1170127824

求解呀，不是很懂！！！！！

plmijb

食物处理器和榨汁机在UL982中均要求一个盖驱动的内锁开关，当盖不在位时，样机不能工作。但搅拌机则没明确要求有杯控制的内锁开关。且市面上的样机大多内锁开关为独立的机械开关。
5 e  p& a+ i' T: B如果电子电路的意外启动能使样机产生伤人的危险，则需符合22.4 即电子电路符合UL991 或有闪灯+控制马达的机械开关的一条，不管是什么样机。

prod10

为何对于其它类型的产品就无要求闪灯，如食物处理器和榨汁机，都是带电子版控制的吖？标准只是指出带电子控制停止的器具，求解？大神，请指导

H-RH

prod10 发表于 2013-6-30 22:26
$ l, d' a0 I! [6 r& E  x请问17.7和19.8都是出自UL982内的标准条款？

是, 出自UL 982

' r- g9 b' @1 r1 q) O5 g, l. k19.8 In the application of 16.2.1 and Table 19.1 to a motor not rated in horsepower, use is to be made of the appropriate table of the National Electrical Code, ANSI/NFPA 70 which gives the relationship between horsepower and full-load currents for motors. For a universal motor, the table applying to a single-phase, alternating current motor is to be used if the appliance is marked for use on alternating current only; otherwise, the table applying to direct-current motors is to be used.

prod10

请问17.7和19.8都是出自UL982内的标准条款？

plmijb

17.7 If a portable appliance employs a motor rated at more than 1/3 horsepower, a motor-control switch for the motor shall be provided in the appliance. See 19.8.

prod10

那么搅拌器是否要带有电源总开关，其他类型的产品只需直接通电进入待机模式，灯光闪烁即可