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| Components' d6 v$ H3 S- @+ ~! L
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( A/ Z* p0 V6 }: T2 L | 61010-1(ed.1);am1;am2+ W" L: M9 W0 E6 i$ `
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Standard:3 u. ~) i+ P0 J5 W- {
IEC 61010-
( D$ t b6 Y' G. a1:1990+A1:1992+A2:19955 \4 g* ?; U4 \+ }3 z" ?
Sub clause:: e2 ]: S P) ~7 ]- J" v! p
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Sheet n. 311
; a; V! u& ^$ B2 k' U( E: ]Page 1(1)4 [ d* Q8 F" t' y* u, W& H
Subject:6 }2 O. c( R( r2 X
Components
) R# @3 u5 n' _2 o" ^Key words:
# d" |( a3 d8 b: h3 `5 I, Z- Installation
! Q6 d! U. Q5 ~" p- Category
+ ?1 M4 A5 r+ M- e+ W! GDecision taken by- r: o" R5 W4 x6 C l4 L
ETF3 and confirmed
! D' [# K' j% b* {* k# R5 qby CTL at its 38th3 }0 u4 D6 p% y0 K
meeting, in Toronto6 H) }6 U/ K m. B
Question:
; M. s$ k6 O! @3 u3 O" q; kWhere equipment is fitted with surge protection devices, is it acceptable for the circuits3 Y; J0 E% C* o _+ k6 I; `* V5 s
following the device to be a lower category than those preceding it?. d+ K3 d9 O8 U0 |2 H
Decision:
; r' g/ R* i3 L, \ Q; ~- P3 SIt is acceptable, for example, for a Category III equipment to have circuits at Category II7 K" F6 ]0 x4 `! u! F
following such a device.% A; L3 `* V7 ^7 t, ?( Q
Explanation:& T4 d2 n" N/ E& Z/ B' N$ Y" S: S
The action of these devices is to remove excessive voltage spikes from the circuit and
+ Q0 Y' F: X+ z3 U4 {, Z4 m- {therefore, the Category of the circuit may be reduced accordingly. IEC 664 does have more
# |- y2 U s( y! m, W. c/ @0 Stests to allow this. 5 sec. “spike” will destroy surge protection" E: Y* d H1 w2 R2 w9 d* ]* q' v+ Q
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发表于 2012-9-19 14:45
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