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7 i5 k/ ?" H$ _& @% Z& Y- c( v
6 g, p: d, C' H9 w" b' A# ?9 D | Components4 }: A% E5 F8 L
| 143 I: L. o/ Q2 z" D) e* W' ?: E" T
| 61010-1(ed.1);am1;am2; r* K' l6 u7 w; S D( o! }
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Standard:, n+ Q- B6 M. ~ L
IEC 61010-, N% b( G) l' B, Q
1:1990+A1:1992+A2:19958 |2 n2 c, L6 N2 G. O4 Y U
Sub clause:/ p% t9 G3 ~( |7 {
14
: d% v2 B- T$ T# X- r6 Y! p# ]( eSheet n. 311
) A W( j8 U# }: N$ a4 BPage 1(1)
5 g; x5 P5 X" \+ r5 N- cSubject:9 P0 Q( `/ t" A
Components
/ s' _( H1 Y! u! yKey words:' r9 S# M7 H; P
- Installation
' h; \: U% M6 \, {/ X" M- Category
8 S- ]# l$ d" [" Z2 Z4 S! GDecision taken by7 g! C# `2 |, ]5 \% W( P; R- T1 T
ETF3 and confirmed O, i6 G( o9 }2 |) O' V7 v
by CTL at its 38th/ h7 r) m1 C* _1 C( S" B7 v& K
meeting, in Toronto
+ }; r& m1 h/ x# l- W- MQuestion:- c) l- J3 x! Z6 o7 s9 a3 w
Where equipment is fitted with surge protection devices, is it acceptable for the circuits
$ ]+ y1 ?$ Q& dfollowing the device to be a lower category than those preceding it?; w8 i7 o, }, C/ {
Decision:
6 T# l0 ~. c0 j9 nIt is acceptable, for example, for a Category III equipment to have circuits at Category II
5 A( l* F& |$ M0 T0 J& {following such a device.
: J3 b* E# o8 l |1 JExplanation:3 q* A5 i, O# i
The action of these devices is to remove excessive voltage spikes from the circuit and
7 D0 ]2 Z% [# o# c: K7 ntherefore, the Category of the circuit may be reduced accordingly. IEC 664 does have more2 _6 Q! Y5 G* G
tests to allow this. 5 sec. “spike” will destroy surge protection
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发表于 2012-9-19 14:45
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