功能绝缘打高压?
保险丝两引脚距离不够,打高压测试怎么打? 是把保险丝焊下来打保险丝两端之间吗? 不足2.5mm嗎?這倒是好奇了... 保险丝有认证??????如果有的话怎么会距离不够?? 保险丝两端是导通的,打耐压? 海之未央 发表于 2016-8-11 08:30 static/image/common/back.gif保险丝有认证??????如果有的话怎么会距离不够??
人家说的明显是pcb trace上不够啊,话说我还真没遇到过这种。。。 没遇到这种情况。。只遇到Fuse 到AC pin 的距离不足。 應該不行, IEC 60950-1 clause 5.3.4有以下說明
For FUNCTIONAL INSULATION, CLEARANCES and CREEPAGE DISTANCES shall satisfy one of the
following requirements a) or b) or c).
For insulation between a SECONDARY CIRCUIT and an inaccessible conductive part that is
earthed for functional reasons, CLEARANCES and CREEPAGE DISTANCES shall satisfy a) or b)
or c).
a) They meet the CLEARANCE and CREEPAGE DISTANCE requirements for FUNCTIONAL
INSULATION in 2.10 (or Annex G).
b) They withstand the electric strength tests for FUNCTIONAL INSULATION in 5.2.2.
c) They are short-circuited where a short-circuit could cause
• overheating of any material creating a risk of fire, unless the material that could be
overheated is of V-1 CLASS MATERIAL, or
• thermal damage to BASIC INSULATION, SUPPLEMENTARY INSULATION or REINFORCED
INSULATION, thereby creating a risk of electric shock.
我觉得保险丝取下来,打耐压过了也算合格,7L说的 a b c 三者满足之一就可以。
其实现在很多机构对于功能绝缘的耐压都不做的,一般他们会考虑通过5.3.4的 c 的测试来判定是否满足。 Hunter_Kou 发表于 2016-8-26 22:03 static/image/common/back.gif
我觉得保险丝取下来,打耐压过了也算合格,7L说的 a b c 三者满足之一就可以。
其实现在很多机构对于功能绝 ...
我觉得虽然耐压过了,距离还是不够,应该还是不合格,要不断保险丝,打L/N之间的耐压,过了也算合格
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