请教如何区分美标的class1,class2,class3产品
请教如何区分美标的class1,class2,class3产品
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@cindy-z
king,首先感谢你的回复.但是你告知的C1、C2、C3的内容是欧标的CI、CII、CIII的分类,美标的CLASS1、CLASS2、CLASS3和欧标的CLASSI、CLASSII、CLASSIII是不同的.
三個定義出自美國國家電氣法案, 並非源自ul:
它分三種電路:
Class 1 Circuit. The portion of the wiring system between
the load side of the overcurrent device or power-limited supply
and the connected equipment. The voltage and power limitations
of the source are in accordance with
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因為這個論壇老有黑手刪貼,本來想講講, 也不愛講了, 怕功夫白費不說, 還得罪人
它分三種電路:
Class 1 Circuit. The portion of the wiring system between
the load side of the overcurrent device or power-limited supply
and the connected equipment. The voltage and power limitations
of the source are in accordance with
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因為這個論壇老有黑手刪貼,本來想講講, 也不愛講了, 怕功夫白費不說, 還得罪人
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@fasten
三個定義出自美國國家電氣法案,並非源自ul:它分三種電路:Class1Circuit.Theportionofthewiringsystembetweentheloadsideoftheovercurrentdeviceorpower-limitedsupplyandtheconnectedequipment.Thevoltageandpowerlimitationsofthesourceareinaccordancewith......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................因為這個論壇老有黑手刪貼,本來想講講,也不愛講了,怕功夫白費不說,還得罪人
请问:美标上定义的Class1、2、3,不同类型的产品有不同的定义吗?而欧标上定义的CLASS I、II、III的要求却是一致的呢!
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@fasten
三個定義出自美國國家電氣法案,並非源自ul:它分三種電路:Class1Circuit.Theportionofthewiringsystembetweentheloadsideoftheovercurrentdeviceorpower-limitedsupplyandtheconnectedequipment.Thevoltageandpowerlimitationsofthesourceareinaccordancewith......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................因為這個論壇老有黑手刪貼,本來想講講,也不愛講了,怕功夫白費不說,還得罪人
fasten,首先谢谢你的回复!
但是上面你只谈到Class 1的要求,Class 2和Class 3美国国家电气法案是如何定义的,能否再告诉我一声?
但是上面你只谈到Class 1的要求,Class 2和Class 3美国国家电气法案是如何定义的,能否再告诉我一声?
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CLASS 2 AND CLASS 3 TRANSFORMERS -UL 1585
INTRODUCTION
1 Scope
1.1 Transformers covered by these requirements, herein called Class 2 or Class 3 transformers, are for
use with Class 2 or Class 3 circuits, respectively, in accordance with the National Electrical Code,
ANSI/NFPA 70. They are intended for connection to essentially sinusoidal supply sources. Permanently
connected transformers are rated 600 volts or less, and cord and plug connected transformers are rated
120 volts or less.
1.2 A Class 2 or Class 3 transformer that is inherently limited has an impedance within the transformer
that limits the current output to a particular maximum value. It may or may not be provided with a
thermostat or other temperature sensitive device to limit its maximum temperature.
1.3 A Class 2 or Class 3 transformer that is not inherently limited does not have an impedance to limit
the maximum current output to a specified value. However, the maximum power output is limited by an
overcurrent-protective device.
1.4 A Class 2 or Class 3 transformer that includes a separate current-limiting impedance, such as a
resistor or a positive temperature coefficient device (PTC), is covered by these requirements.
1.5 A Class 2 transformer has a 30-volt rms maximum secondary potential under any condition of loading
or open circuit.
1.6 A Class 2 or Class 3 transformer that includes a resonance regulating circuit is covered by these
requirements.
1.7 These requirements do not cover power supplies, toy transformers, direct plug-in transformers, or
transformers intended for use in audio-, radio-, or television-type appliances. A transformer provided with
a rectifier is considered to be a power supply.
1.8 The requirements in this standard may be modified by requirements in an end product standard if a
transformer is intended for use only as a component in other equipment.
1.9 A product that contains features, characteristics, components, materials, or systems new or different
from those covered by the requirements in this standard, and that involves a risk of fire or of electric shock
or injury to persons shall be evaluated using appropriate additional component and end-product
requirements to maintain the level of safety as originally anticipated by the intent of this standard. A
product whose features, characteristics, components, materials, or systems conflict with specific
requirements or provisions of this standard does not comply with this standard. Revision of requirements
shall be proposed and adopted in conformance with the methods employed for development, revision, and
implementation of this standard.
INTRODUCTION
1 Scope
1.1 Transformers covered by these requirements, herein called Class 2 or Class 3 transformers, are for
use with Class 2 or Class 3 circuits, respectively, in accordance with the National Electrical Code,
ANSI/NFPA 70. They are intended for connection to essentially sinusoidal supply sources. Permanently
connected transformers are rated 600 volts or less, and cord and plug connected transformers are rated
120 volts or less.
1.2 A Class 2 or Class 3 transformer that is inherently limited has an impedance within the transformer
that limits the current output to a particular maximum value. It may or may not be provided with a
thermostat or other temperature sensitive device to limit its maximum temperature.
1.3 A Class 2 or Class 3 transformer that is not inherently limited does not have an impedance to limit
the maximum current output to a specified value. However, the maximum power output is limited by an
overcurrent-protective device.
1.4 A Class 2 or Class 3 transformer that includes a separate current-limiting impedance, such as a
resistor or a positive temperature coefficient device (PTC), is covered by these requirements.
1.5 A Class 2 transformer has a 30-volt rms maximum secondary potential under any condition of loading
or open circuit.
1.6 A Class 2 or Class 3 transformer that includes a resonance regulating circuit is covered by these
requirements.
1.7 These requirements do not cover power supplies, toy transformers, direct plug-in transformers, or
transformers intended for use in audio-, radio-, or television-type appliances. A transformer provided with
a rectifier is considered to be a power supply.
1.8 The requirements in this standard may be modified by requirements in an end product standard if a
transformer is intended for use only as a component in other equipment.
1.9 A product that contains features, characteristics, components, materials, or systems new or different
from those covered by the requirements in this standard, and that involves a risk of fire or of electric shock
or injury to persons shall be evaluated using appropriate additional component and end-product
requirements to maintain the level of safety as originally anticipated by the intent of this standard. A
product whose features, characteristics, components, materials, or systems conflict with specific
requirements or provisions of this standard does not comply with this standard. Revision of requirements
shall be proposed and adopted in conformance with the methods employed for development, revision, and
implementation of this standard.
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1.范围
1.1 本标准包含直接插入的CLASS 2 电源设备,意指连接15A, 名义上120-240VAC 分支电路,和软线
连接的CLASS2 电源设备,意指连接15或20A 交流电分支电路与潜在少于150V接地.此类产品使
用绝缘的变压器和可以并入整流器及其它组件,提供直流和交流电的能源.此类产品可以提供非强
制式直流插座,预期可用于运截电池适配器.此类产品也提供CLASS 2 电源设备,和国际电码
ANSI/NFPA 70 是一致的,预期可用于提供能源予低压、用电操作的装置.
1.2 本标准包含那些产品在任何情况的输出负载下,输入的电源不超过660W.
1.3 本标准不包含连接在设备或系统内的电源设备可能所发出的影响.
1.4 有特别用途记号的产品(如用于音响、无线电报或影像类的设备﹔医科或牙科的设备﹔或其它工具)
可能会被列入合适的产品标准内的附加要求.
1.5 本标准不包含用于替在开启引擎时的发动机激活器充电的产品.此类产品包含于UL 1236 .
1.6 本标准包含CLASS 2 产品,如本标准所定义,预期用于玩具类.此类产品也符合UL 697 的标准.
1.7 本标准不包含不属于CLASS 2 输出的产品,也不包含用于替轮椅或类似的移动性设备充电的电
池充电器.此类产包含于UL1012 .
1.8 本标准不包含用于连接能源供应,有CLASS 2 变压器存在的产品.此类产品包含于UL 1585 .
1.8.1 本标准不包含只接受直流电源供电的产品.此类产品包含于UL458 .
1.9 在特色、特征、组成物、材料或系统上有别于其它标准,而其中牵涉到火灾、电击或伤人的产品,
需要以适当的附加组成物和试品设备作评定, 对此类产品的用户保持应的安全程度,以达到本标
准的原本预期的意图.
UL1310
1.1 本标准包含直接插入的CLASS 2 电源设备,意指连接15A, 名义上120-240VAC 分支电路,和软线
连接的CLASS2 电源设备,意指连接15或20A 交流电分支电路与潜在少于150V接地.此类产品使
用绝缘的变压器和可以并入整流器及其它组件,提供直流和交流电的能源.此类产品可以提供非强
制式直流插座,预期可用于运截电池适配器.此类产品也提供CLASS 2 电源设备,和国际电码
ANSI/NFPA 70 是一致的,预期可用于提供能源予低压、用电操作的装置.
1.2 本标准包含那些产品在任何情况的输出负载下,输入的电源不超过660W.
1.3 本标准不包含连接在设备或系统内的电源设备可能所发出的影响.
1.4 有特别用途记号的产品(如用于音响、无线电报或影像类的设备﹔医科或牙科的设备﹔或其它工具)
可能会被列入合适的产品标准内的附加要求.
1.5 本标准不包含用于替在开启引擎时的发动机激活器充电的产品.此类产品包含于UL 1236 .
1.6 本标准包含CLASS 2 产品,如本标准所定义,预期用于玩具类.此类产品也符合UL 697 的标准.
1.7 本标准不包含不属于CLASS 2 输出的产品,也不包含用于替轮椅或类似的移动性设备充电的电
池充电器.此类产包含于UL1012 .
1.8 本标准不包含用于连接能源供应,有CLASS 2 变压器存在的产品.此类产品包含于UL 1585 .
1.8.1 本标准不包含只接受直流电源供电的产品.此类产品包含于UL458 .
1.9 在特色、特征、组成物、材料或系统上有别于其它标准,而其中牵涉到火灾、电击或伤人的产品,
需要以适当的附加组成物和试品设备作评定, 对此类产品的用户保持应的安全程度,以达到本标
准的原本预期的意图.
UL1310
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