DSH 392 Test of non-separable thin sheet material

小米

广东安规检测
有限公司提供：

小型摆管淋雨试验机

IPX5X6X7喷水试验机

1000L恒温恒湿箱

各种试验指现货

可程式恒温恒湿试验箱

水平垂直燃烧机

自动卷线器试验机

耐划痕试验机

各种灯头量规现货

灼热丝试验机现货

GB1002插头量规

IPX1-X7淋雨现货

IEC61347/UL935镇流器热试验箱

灯具防风罩

IK冲击试验机

UL498插头插座量规

VDE0620插头插座量规

稳定性试验台

家电温升测试角

针焰试验机现货

热电偶焊机现货

家电125mm试验指

E12灯头量规

无绳壶无绳电熨斗插拔寿命试验机

IEC60335试验指甲

DSH 392

Test of non-separable thin sheet material ( A( F4 |2 c3 ^% |3 y$ @

2.10.5.2 9 G: i1 p6 d; o/ Z& {6 s2 A& }

60950(ed.3) # d; P6 g9 V# ]+ }) P" T

Question:
1 `( c! H# r" P  {6 lHow is non-separable thin sheet insulation in wound components tested?
Rationale:
9 ^8 E. ]0 H5 H- n, T/ B, @There are non-separable thin sheet foils on the market and used in wound components,
7 P/ u/ U' I6 q# q+ d* C: iwhich cannot be tested according to the requirements and test-method in the existing
standard. A proposal was made to TC74-WG6 how this matter can be handled. The
( J, h( U" ~+ o2 n2 S0 B  Y0 Oproposal is attached.
4 y% w. Y$ M" p# CDecision:
% |8 G" t$ h. s. e0 ]Use of non-separable thin sheet insulation in wound components
The following proposal shall be used until the new edition is published.
! a8 I2 V) j+ x4 T" U" m& M1. Introduction
This document presents two alternative versions of the test procedure given in IEC
* V; T6 ]5 a' f! t. p3 {61558-1 for checking the mechanical durability of thin sheet materials.
Test method X adapts the published procedure to the conventions and practices used in
8 {, O# s5 ]% f, a2 E' _IEC 60950. In Method X, the metal foil is secured to the sample prior to the test.
% s7 b0 i' B- A7 ?3 A8 l1 ITest method Y is the slightly different procedure observed on a video presentation,
. J. v: Y0 K; r8 cwhereby the metal foil is only added to the test assembly after the sample has been
' \/ Z- X% X: V2 N& @stressed by rotating it in the test fixture.
Test method Y appears to be the more practical method, and is evidently how the test is
3 e1 i9 o# r+ k+ E$ W6 u. Ccarried out in at least one test laboratory. The two methods should give the same results.
2. Proposal
Change the title of 2.10.5.2 to the following:
! T, j6 d8 s* ^2.10.5.2 Separable thin-sheet material
Modify the first paragraph of 2.10.5.2 as follows:
Insulation in separable thin sheet materials, and in two layers of non-separable thin sheet
  {, N" f" [8 Z' c) k8 F8 cmaterials, is permitted, ….
Add a new sub-clause 2.10.5.X or 2.10.5.Y.
Test Method X
8 Y8 w7 }- }: \; G* q2.10.5.X Non-separable thin sheet material
Insulation in three or more layers of non-separable thin-sheet materials is permitted for use within
the equipment ENCLOSURE, and shall not be subject to handling or abrasion during servicing. It
  n$ U. T* g1 [6 q) J8 P9 }& |shall have adequate mechanical strength.
NOTE - The purpose of the tests in 2.10.5.X is to reveal defects that are hidden in inner layers of insulation,
so there is no test for insulation in two layers. For insulation in two layers of non-separable thin-sheet
materials, see 2.10.5.2
There is no requirement regarding distances through insulation, nor for all layers of insulation to be
of the same material.
+ G4 C0 `0 z" m  A- `Compliance is checked by inspection and by the following test:
Three test samples of thin sheet material are used, each approximately 70 mm wide.
0 `" ?. o4 N4 R" bOne sample is fixed to the mandrel of the test fixture as shown in figure 5X.
% l, t1 T$ C1 e" |0 k, c' HA sheet of aluminium or copper foil, 0,035 mm ± 0,005 mm thick, approximately 30 mm wide and at
0 G2 o% w. t1 q3 O" d( {( k; [$ uleast 100 mm long, is fixed to the surface of the sample. The foil is positioned so that its edges are
approximately 20 mm from the edges of the sample (see figure 5Xd) and so that when the
! a9 F- l0 D1 p  X6 T% D* g& ?mandrel is in its final position, the foil overlaps the free end of the sample by at least 10 mm (see
. U2 c, A- k; M2 f  M9 \# D, |' mfigure 5Xc). The foil is tightened by a pull of approximately 1 N, using an appropriate clamping
& x( n& h* [- m: a* i5 R! idevice.
- _6 {$ ^2 _1 E! u3 L4 V; ZA pull of 150 N is applied to the free end of the sample, using an appropriate clamping device. The
mandrel is twice rotated forwards and backwards by 230°, and then forwards to the final position.
While the mandrel is in its final position, and within the 60 s following the final positioning, an
electric strength test is applied between the mandrel and the metal foil in accordance with 5.2.2,
& |4 V1 o1 V1 M' x) F* _using a test voltage of 1,5 times the value specified in table 5B.
( v5 d$ l2 L8 _5 [The test is repeated with the other two samples
If a sample breaks at the clamping device during rotation, the test is repeated on a fresh sample. If
one or more samples breaks at any other place, the test has failed.
............................
Add new Figure 5X (adapted from Figure 6 of IEC 61558-1)
Figure 5Xa is as figure 6a of IEC 61558-1, modified as follows:
$ A% f5 L& v4 ?' O' ZReplace "3 x R = 0,5 ± 0,02" by "R = 0,5 ± 0,02 (typ)"
Replace "Material: steel nickel plated or brass" by "Material: metal"
Figure 5Xd is the same as figure 6c of IEC 61558-1
Test Method Y
2.10.5.Y Non-separable thin sheet material
3 K& y9 w/ y1 L, h4 x+ uInsulation in three or more layers of non-separable thin-sheet materials is permitted for use within
the equipment ENCLOSURE, and shall not be subject to handling or abrasion during servicing. It
shall have adequate mechanical strength.
NOTE - The purpose of the tests in 2.10.5.y is to reveal defects that are hidden in inner layers of insulation,
so there is no test for insulation in two layers. For insulation in two layers of non-separable thin-sheet
; q: v. m/ o( H9 R+ omaterials, see 2.10.5.2
There is no requirement regarding distances through insulation, nor for all layers of insulation to be
of the same material.
- I- d- {5 i( [2 s1 NCompliance is checked by inspection and by the following test:
Three test samples of thin sheet material are used, each approximately 70 mm wide.
. c  H4 ?- s! g+ C# k, W7 |1 MOne sample is fixed to the mandrel of the test fixture as shown in figure 5Y.
& @9 `$ r  O3 W, R% r% }3 |A pull of 150 N is applied to the free end of the sample, using an appropriate clamping device. The
5 ?- y" E2 r* N" g9 o# i* bmandrel is twice rotated forwards and backwards by 230°, and then forwards to the final position.
! V# H( C7 c% W( ^, q) q% eA sheet of aluminium or copper foil, 0,035 mm ± 0,005 mm thick, approximately 30 mm wide and at
7 P' J0 w0 E! z: r2 Kleast 200 mm long, is placed across is the surface of the sample, hanging down on each side of
the mandrel. The foil is tightened by a pull of approximately 1 N at each end, using appropriate
4 w: c- N' q# a7 `; ?3 }clamping devices.. The foil is positioned so that its edges are approximately 20 mm from the edges
+ |' @; V# Y/ ?) x  g# s# i7 [- Pof the sample (see figure 5Yd).
While the mandrel is in its final position, and within the 60 s following the final positioning, an
electric strength test is applied between the mandrel and the metal foil in accordance with 5.2.2,
4 J5 X7 P# V! g3 L1 Iusing a test voltage of 1,5 times the value specified in table 5B.
The test is repeated with the other two samples
* i" U  d% s: V3 `) bIf a sample breaks at the clamping device during rotation, the test is repeated on a fresh sample. If
5 s! {/ B0 Q$ m% p0 None or more samples breaks at any other place, the test has failed.
...............................
Add new Figure 5Y (adapted from Figure 6 of IEC 61558-1)
Figure 5Ya is as figure 6a of IEC 61558-1, modified as follows:
3 `+ V- d) A4 GReplace "3xR = 0,5 ± 0,02" by "R = 0,5 ± 0,02 (typ)"
0 ~! G: J! U9 Y4 RReplace "Material : steel nickel plated or brass" by "Material: metal"
% T# R$ H( B2 k+ B: S! P/ aFigure 5Yd is the same as figure 6c of IEC 61558-1
. R7 q0 c" ?* G2 V6 d1 e: n
  z3 e; ?- `0 D, `# \0 s
0 u; }; B/ ^1 e# t) ~5 b: N5 @- ?
' K! I! Q: H6 u& C  P$ D& s, f, g/ a