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" |* K( h6 m- ~ H4 g" h/ R( c' |
0 V1 B6 D: w$ D* o | Components2 i& M2 z# I8 X) L# O, {2 V& w
| 148 E0 M( U; M$ [$ U5 j G& [# X9 k
| 61010-1(ed.1);am1;am2
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* L5 ~8 r! E& m6 C% BStandard:9 @$ I8 s* ~# u& g( m
IEC 61010-
+ `3 W' s# F9 h1:1990+A1:1992+A2:19952 ^. n* f( z4 S+ [5 |
Sub clause:) \# \" n: E: ?3 y" Z. U- n7 ]8 _
14
0 H0 H; w8 _' |& m$ b; c$ O+ OSheet n. 3116 Z+ w. V! x2 `9 n! c
Page 1(1)
0 B& f. @& ?- ?0 U2 RSubject:! i, }& x4 `! { v
Components
. x" J0 X4 L3 f5 I2 vKey words:
2 ]$ y- o8 n2 z4 C6 p9 Y% ]- Installation. i' S# B& N. r8 ~, w( h# L3 P
- Category9 {! O0 u& ]2 B4 E1 C
Decision taken by4 Q: f0 J# j" h y# T, ~
ETF3 and confirmed- u2 p8 _, u/ {7 _1 p1 n
by CTL at its 38th
# B- s5 r' O3 @9 ^% umeeting, in Toronto0 U: M: N$ O0 _
Question:
D+ J/ A1 [8 d* ?. H! nWhere equipment is fitted with surge protection devices, is it acceptable for the circuits( P- F) _$ j# ^
following the device to be a lower category than those preceding it?
/ B% w& P3 D" Y4 J* K2 fDecision:
) _3 P7 |1 S( p, b) ?. w5 wIt is acceptable, for example, for a Category III equipment to have circuits at Category II5 M% o; s$ ^+ |' Q
following such a device.
7 ~8 T* |3 d7 k7 i6 {; f3 ]' c* @Explanation:+ m& S2 S0 f+ I1 B$ \. }8 Q! c3 R6 O
The action of these devices is to remove excessive voltage spikes from the circuit and+ @ q3 I1 Z) u& M; H( `5 K% ~# {
therefore, the Category of the circuit may be reduced accordingly. IEC 664 does have more, T/ U7 Q: H% F- q- N9 [7 u6 g
tests to allow this. 5 sec. “spike” will destroy surge protection& {# t" O! l0 Q: i
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发表于 2012-9-19 14:45
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