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: u8 j2 O2 o) K) ^9 P4 [' Q* Q2 I v
| Components
$ T/ p7 U' \: D" f; H5 @# d | 140 v0 Q' `0 ~8 @6 `) ]8 U
| 61010-1(ed.1);am1;am25 W; H, w9 o, ?. X# i
|
3 d& X( T9 l& |5 p
' F+ c3 F- F8 ^% h: `6 bStandard:
7 h8 Z) p+ h& B( e# J7 ?, S1 W7 n; LIEC 61010-
* W2 o1 g, i- g1:1990+A1:1992+A2:1995* l h8 B2 u G1 P* p; {4 S
Sub clause:
, q, R; D. r' X; \4 z" V146 a M& \7 y- T$ l& g( E# ^3 x4 R1 a
Sheet n. 3110 o4 F0 _" t6 @
Page 1(1)
5 P$ _6 d) [7 z8 l/ GSubject:
& A+ [9 d+ C7 S6 b, r4 YComponents
6 J5 Q- v: u, c8 U# Q+ ^Key words:
7 K7 O: N8 ?1 `7 [" V% t: i- Installation
" V, T; K# ~3 ?7 c8 N8 x$ U0 J- Category
- ^3 @+ H( E! \ N v" j% UDecision taken by0 x4 `' r& e& ~0 W! U0 u. L7 S
ETF3 and confirmed+ g( o: K3 H- T- X, s: P' w
by CTL at its 38th* W2 e! r5 C' q5 N1 l/ V& l" k
meeting, in Toronto
* \& K8 c/ x! F$ e, `' E! qQuestion:
" \' [2 m! L( [7 jWhere equipment is fitted with surge protection devices, is it acceptable for the circuits
- G' ]5 e. }( e; ^following the device to be a lower category than those preceding it?1 }% t; N6 i$ z7 r4 S2 r2 I$ b Q* Y
Decision:
* ?& [' K5 g+ t3 e4 H6 I! XIt is acceptable, for example, for a Category III equipment to have circuits at Category II8 L8 x; q% r- W
following such a device.
' R6 C. y& Q0 k; m+ ^* K1 k/ W$ o$ VExplanation:
j3 L" V4 Q* _& P2 `The action of these devices is to remove excessive voltage spikes from the circuit and
, f, m7 S: z) @5 Ktherefore, the Category of the circuit may be reduced accordingly. IEC 664 does have more
: i" ~9 ^4 g3 A) Z/ ?1 Z( z8 t2 s) Vtests to allow this. 5 sec. “spike” will destroy surge protection
& D/ ?+ q& o% ^1 y
% K# s' F+ o$ q$ L" F7 z; m
3 ~2 C7 Y4 D# L/ W! m, @2 m
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发表于 2012-9-19 14:45
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