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发表于 2009-7-25 22:20
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回 nw-interfans 5 P* b- O5 c/ m" A- i) B
一,10章,接地措施:+ a; L* l8 O2 g/ _- e) P7 h2 a0 o
b) for metal parts connected to an earthing terminal or earthing plug pin, by the following test.
J/ H: h8 X+ T7 K1 W/ v/ sA current of 25 A ± 0.75 A, derived from an a.c. source having a no-load voltage not exceeding 12 V, is passed for s between the remote end of the protective conductor of a 3-core flexible cord (cut to a length of 150 mm ± 5 mm measured from the nearest edge of the earthing pin) and the remote end of the earthing plug pin and any accessible metal part intended to be earthed,
, M4 n' l: F4 {/ J) X! b: S b)项总要求是连接到接地端子或接地插销的金属部件,但中间在描述过程中出现了“150mm三芯软线的最远端”,是否需要测量?如果象国标或IEC测量,根本就不会涉及到接地导线。
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: n* \. e% C I二,11章,端子和端头:6BA的英式螺纹是英制电器螺纹,钻孔直径为2.4到2.5mm。# m4 `6 W5 m' q" D" z
测量时如何进行呢?测量螺纹孔的内径吗?在2.4~2.5之间?
2 C7 W. `2 p+ I% ~ 我觉得标准条款是讲端子螺钉,没涉及到螺纹孔。
K" a* E3 R- f7 G, I Terminal screws shall have a declared outside diameter of not less than 3 mm or be not smaller than 6 B.A. |
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