DSH 166A/200A/201A（GENERALITY）交叉開槽螺釘/電鍍層/直流試驗(yàn)電路電壓降及紋波

DSH 166A

Subject: Acceptance of cross-slotted screws

Question:

Are cross-slotted screws generally accepted in electrical equipment ?

Decision:

Yes, without any restriction, as the tool used for this type of screws cannot be considered as a special tool.

問(wèn)題：

能接受在電子設(shè)備中使用交叉開槽螺釘嗎？

決定：

可以，沒(méi)有限制。適配這些螺釘?shù)墓ぞ卟荒苷J(rèn)為是特殊工具。

************************************

DSH 200A

Subject: Steel as a current carrying part

Question:

Use of steel as a current carrying part when provided with an electroplated coating of zinc, whose thickness is dependent on degree of protection IP of the enclosure：If the enclosure withstands the relevant tests with respect to harmful ingress of water, is the inside of the enclosure considered as dry environment or are the environment condition inside and the outside the enclosure with respect to corrosion the same?

Decision:

The same requirement shall be applied inside as well outside the enclosure of the appliance.

問(wèn)題：

使用鋼作為載流部件并鍍鋅，鍍層厚度取決于設(shè)備外殼IP防護(hù)等級(jí)：假設(shè)外殼通過(guò)了禁止水侵入的相關(guān)試驗(yàn)，設(shè)備外殼內(nèi)部可以認(rèn)為是干燥環(huán)境嗎？還是要求外殼內(nèi)外部都必須防腐蝕？

決定：

外殼內(nèi)部防腐蝕要求與外部一致。

************************************

DSH 201A

Subject: Characteristics of D.C. electric circuits for verifying normal operation and making and breaking capacity

To reach an acceptable test reproducibility, when verifying normal operation and making and breaking capacity, it is recommended that the test circuit has the following characteristics:

- Voltage drop:

The maximum voltage drop which should not be exceeded, when passing from noload to load condition, is 5% of the rated voltage.

- Voltage ripple value:

Voltage ripple valueThe supply voltage ripple, at no-load condition, should not exceed 5%.

為了保證試驗(yàn)良好的復(fù)現(xiàn)性，驗(yàn)證正常運(yùn)行以及合斷能力時(shí)，建議直流試驗(yàn)電源具備以下特性：

電壓降：

從空載變化到滿載時(shí)，輸出電壓降不超過(guò)額定電壓的5%

電壓紋波：

空載時(shí)，輸出電壓紋波不超過(guò)5%。

點(diǎn)擊下方名片，關(guān)注“朱大俠的質(zhì)檢江湖”微信公眾號(hào)，一起來(lái)研究安規(guī)吧~