請教如何區(qū)分美標的class1,class2,class3產(chǎn)品
請教如何區(qū)分美標的class1,class2,class3產(chǎn)品
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@cindy-z
king,首先感謝你的回復(fù).但是你告知的C1、C2、C3的內(nèi)容是歐標的CI、CII、CIII的分類,美標的CLASS1、CLASS2、CLASS3和歐標的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
請問:美標上定義的Class1、2、3,不同類型的產(chǎn)品有不同的定義嗎?而歐標上定義的CLASS I、II、III的要求卻是一致的呢!
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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,首先謝謝你的回復(fù)!
但是上面你只談到Class 1的要求,Class 2和Class 3美國國家電氣法案是如何定義的,能否再告訴我一聲?
但是上面你只談到Class 1的要求,Class 2和Class 3美國國家電氣法案是如何定義的,能否再告訴我一聲?
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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.范圍
1.1 本標準包含直接插入的CLASS 2 電源設(shè)備,意指連接15A, 名義上120-240VAC 分支電路,和軟線
連接的CLASS2 電源設(shè)備,意指連接15或20A 交流電分支電路與潛在少于150V接地.此類產(chǎn)品使
用絕緣的變壓器和可以并入整流器及其它組件,提供直流和交流電的能源.此類產(chǎn)品可以提供非強
制式直流插座,預(yù)期可用于運截電池適配器.此類產(chǎn)品也提供CLASS 2 電源設(shè)備,和國際電碼
ANSI/NFPA 70 是一致的,預(yù)期可用于提供能源予低壓、用電操作的裝置.
1.2 本標準包含那些產(chǎn)品在任何情況的輸出負載下,輸入的電源不超過660W.
1.3 本標準不包含連接在設(shè)備或系統(tǒng)內(nèi)的電源設(shè)備可能所發(fā)出的影響.
1.4 有特別用途記號的產(chǎn)品(如用于音響、無線電報或影像類的設(shè)備﹔醫(yī)科或牙科的設(shè)備﹔或其它工具)
可能會被列入合適的產(chǎn)品標準內(nèi)的附加要求.
1.5 本標準不包含用于替在開啟引擎時的發(fā)動機激活器充電的產(chǎn)品.此類產(chǎn)品包含于UL 1236 .
1.6 本標準包含CLASS 2 產(chǎn)品,如本標準所定義,預(yù)期用于玩具類.此類產(chǎn)品也符合UL 697 的標準.
1.7 本標準不包含不屬于CLASS 2 輸出的產(chǎn)品,也不包含用于替輪椅或類似的移動性設(shè)備充電的電
池充電器.此類產(chǎn)包含于UL1012 .
1.8 本標準不包含用于連接能源供應(yīng),有CLASS 2 變壓器存在的產(chǎn)品.此類產(chǎn)品包含于UL 1585 .
1.8.1 本標準不包含只接受直流電源供電的產(chǎn)品.此類產(chǎn)品包含于UL458 .
1.9 在特色、特征、組成物、材料或系統(tǒng)上有別于其它標準,而其中牽涉到火災(zāi)、電擊或傷人的產(chǎn)品,
需要以適當?shù)母郊咏M成物和試品設(shè)備作評定, 對此類產(chǎn)品的用戶保持應(yīng)的安全程度,以達到本標
準的原本預(yù)期的意圖.
UL1310
1.1 本標準包含直接插入的CLASS 2 電源設(shè)備,意指連接15A, 名義上120-240VAC 分支電路,和軟線
連接的CLASS2 電源設(shè)備,意指連接15或20A 交流電分支電路與潛在少于150V接地.此類產(chǎn)品使
用絕緣的變壓器和可以并入整流器及其它組件,提供直流和交流電的能源.此類產(chǎn)品可以提供非強
制式直流插座,預(yù)期可用于運截電池適配器.此類產(chǎn)品也提供CLASS 2 電源設(shè)備,和國際電碼
ANSI/NFPA 70 是一致的,預(yù)期可用于提供能源予低壓、用電操作的裝置.
1.2 本標準包含那些產(chǎn)品在任何情況的輸出負載下,輸入的電源不超過660W.
1.3 本標準不包含連接在設(shè)備或系統(tǒng)內(nèi)的電源設(shè)備可能所發(fā)出的影響.
1.4 有特別用途記號的產(chǎn)品(如用于音響、無線電報或影像類的設(shè)備﹔醫(yī)科或牙科的設(shè)備﹔或其它工具)
可能會被列入合適的產(chǎn)品標準內(nèi)的附加要求.
1.5 本標準不包含用于替在開啟引擎時的發(fā)動機激活器充電的產(chǎn)品.此類產(chǎn)品包含于UL 1236 .
1.6 本標準包含CLASS 2 產(chǎn)品,如本標準所定義,預(yù)期用于玩具類.此類產(chǎn)品也符合UL 697 的標準.
1.7 本標準不包含不屬于CLASS 2 輸出的產(chǎn)品,也不包含用于替輪椅或類似的移動性設(shè)備充電的電
池充電器.此類產(chǎn)包含于UL1012 .
1.8 本標準不包含用于連接能源供應(yīng),有CLASS 2 變壓器存在的產(chǎn)品.此類產(chǎn)品包含于UL 1585 .
1.8.1 本標準不包含只接受直流電源供電的產(chǎn)品.此類產(chǎn)品包含于UL458 .
1.9 在特色、特征、組成物、材料或系統(tǒng)上有別于其它標準,而其中牽涉到火災(zāi)、電擊或傷人的產(chǎn)品,
需要以適當?shù)母郊咏M成物和試品設(shè)備作評定, 對此類產(chǎn)品的用戶保持應(yīng)的安全程度,以達到本標
準的原本預(yù)期的意圖.
UL1310
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