9 u8 z! T( d$ d/ x可惜的是整条的线皮可能很长的。怎么保证都能测试到呢？ ; J" ~* ` Q9 S+ F' d7 i4 Y % L$ x9 i. w5 X K, h& F8 l耐压测试是要带绝缘手套，垫绝缘脚板的。盆子可能是我没讲清楚，应该用胶盆并使外面保证没打湿。作者: cloud.huang 时间: 2009-7-31 14:48
线皮上再加铝箔,一般认证过的内部线2000V都没问题.作者: hekejiu 时间: 2009-7-31 15:09
按国家标准,必须是放在水中,进行水浴电压测试作者: 城市妖 时间: 2009-7-31 15:09
moonxu 说的有道理，但是还是觉得很危险。( H8 z$ ^2 u3 n+ p
我司有很多买不到的线都是定做的，检测的时候剪下一小段，做线皮对线芯的耐压就够了，倒是没有考虑过均一性问题。作者: 19800108 时间: 2009-7-31 15:55
各位老兄；有没有相关的标准看下的哟。作者: moonxu 时间: 2009-7-31 16:14
UL1582 : I/ \" K. \% A) k UL817 4 a/ o# |3 k0 y& Y1 f论坛里就有，自己找一下。作者: wwnw_007 时间: 2009-7-31 16:15
水浴法是标准要求的方法，一是采用塑料盆，外表不能湿；二是采用金属盆，需要接地，此方法只须高压棒接触电线芯就行，三是采用标准的水槽，四是采用金属箔包裹电线绝缘外，也可以的。作者: stevenyu 时间: 2009-7-31 16:27
UL 2556中對絕緣耐壓測試有三種方式. 0 C' d' B: Y( x6.2 Dielectric voltage-withstand + P* {7 v, {1 H; U6.2.1 Scope 2 q5 i1 y6 m2 dThis test establishes the methods for determining the dielectric voltage-withstand of a wire or cable.& ^: {) g0 H( t! z! F" i
6.2.2 Apparatus' u! H9 N$ f8 R w# [
The apparatus shall consist of ; i8 c; H+ A7 xa) an isolation transformer capable of supplying a test potential of 48 to 62 Hz, whose output ) v: }9 Q$ B+ v2 C2 E, [; O& spotential is continuously variable from near zero to at least the specified rms test potential; C1 E; C: s$ P) t
b) a voltmeter having an accuracy of ±5%, on the high voltage side of the transformer. If: C5 |* `. B# ~9 e. z
analog, it shall have a response time that does not introduce a lagging error greater than 1% of + w' y X& U3 \7 K; }1 V8 [" Q- lfull scale at the specified rate of increase in voltage; 6 i j( [, ~3 ^c) a fault current indicator;- `2 u L' ~" s
d) a forced-air oven as described in Clause 4.2.3 Item (i), having insulated bushings for 9 l$ U. e2 D, e5 ] }connection of the test voltage while the oven is closed;+ Q8 n E6 f% C' m# D
e) a temperature-measuring device with an accuracy of ±1 °C; 8 D% _) @ _2 _% Y/ v$ Gf) a tank filled with tap water; and. b1 @$ T, f9 K- c
g) a means of grounding, maximum impedance of 15W. - G+ e: S7 i( T2 h) h4 D6.2.3 Preparation of specimens& D, ~$ _. u# J0 ~1 n- b6 s
6.2.3.1 Method 1 (in water)1 ?1 Y7 n k0 _8 T% k- n5 |8 h& Z
Both ends of the individual conductors shall be made bare. + O; r1 x& K' ^In preparing the wire for test, each end of the specimen shall be brought out well above the water level 7 I' {( V0 J Z% U4 G# c' _* lin the tank, where applicable, and the covering removed from the surface of the insulation for a short* f5 c i6 Q4 Y* G# M
distance if necessary to prevent surface leakage. The temperature of the water in which the specimen is 0 V5 l- m0 E. F' v1 |* }: u/ j1 Zimmersed need not be controlled unless specified in the product standard.+ g, G& m0 h& T e! M- ~3 l0 P
Unless specifically required by the product standard, a shielded or metal-covered single-conductor8 M% x8 k+ m2 q5 z7 h: l
specimen need not be immersed in water, the test voltage being applied between the conductor and the ?- f! [: [& o% B. o* Rshield or metal covering. ! k9 n3 q P$ @+ f& l4 qUnless specifically required by the product standard, a multiconductor cable need not be immersed in) n0 Y/ w" }. o+ |; [0 Z
water, the test voltage being applied between each conductor and the electrode, consisting of all other! t. @" b4 D6 V' n1 j
conductors connected together and to all shields and metal coverings, as applicable.# Q* d, e U. b2 N$ T
In all cases, the ends of the conductor of the specimen shall be spaced from the grounded electrode a( A5 _' P7 x6 |- b( z# c
sufficient distance to prevent corona or flashover at the ends during application of the test voltage. 0 l7 j& P8 N2 W+ \* D! o9 O6.2.3.2 Method 2 (in air)- a# Y' _# i/ m4 `0 z
Both ends of the individual conductors shall be made bare. , t% E' H, l$ f/ D8 U6 W [3 B. O: LFor a single-conductor cable, a grounding electrode, when not present as a component, shall be applied. : ~, @" G4 M3 x; `$ uA snug-fitting close-weave copper braid, a metallic tape, or graphite have been found to be acceptable.3 g6 S+ c; ?8 ?$ |4 _6 t6 D
6.2.3.3 Method 3 (in air at elevated temperature)6 j8 }( ^5 c8 D3 w- s; Y
Both ends of the individual conductors shall be made bare. * ^# ?$ b2 m I6 L1 W0 T2 {9 M; I, |4 a: eFor a single-conductor cable, a grounding electrode, when not present as a component shall be applied., ?# ?- x# Y6 R2 D j
A snug-fitting close-weave copper braid, a metallic tape, or graphite have been found to be acceptable.作者: zy3618 时间: 2010-6-25 23:44
浸水，或在空气中作者: pz02010 时间: 2010-6-26 11:26
本人认为都可以，但是从个方面考虑和看的实验来说，才用绝缘包铝铂只最使用的。- s7 F* s$ Y q* ^/ Q
虽然存在偏差，但是几千伏的电压也不会太在乎那些，再说耐压测试机本身的电压也是存在电压不稳的可能，所以为了安全和方便，本人支持绝缘包铝铂作者: jeremyho88 时间: 2010-6-26 14:28
要说方便与安全，在水中并无什么不妥。水箱外面有水也无妨，反正是接在低压端，不存在安全性。金属箔包覆在电线外表，如果电线长的话，就不太方便作者: keyou 时间: 2010-6-26 16:50
