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4 l5 M* V s# ]! ?
& q: c) f2 x% a+ p* G/ X7 m* V( O# j | Components
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+ K6 Q" I3 C# o0 Z$ \ | 61010-1(ed.1);am1;am2
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Standard:
- R0 Q; \' l9 T* V3 ]( n+ eIEC 61010-/ P) q5 ]5 t# C) Q0 s
1:1990+A1:1992+A2:1995! Z1 v, \( n2 [4 F& h; Z' y
Sub clause:. _3 b) S( ~" I
14& h7 ~! q0 h; k) @ V, F
Sheet n. 311
; E; }2 ]& N- \+ FPage 1(1)
{& f" P* a9 t8 [, ySubject:
. Z) d' U7 I+ S% @/ |Components
7 u. D5 ^- _, @. G' }Key words:
: {9 S: F% g5 |" ~6 g' i- Installation
: P/ m' P( K8 M- Category7 r* z# i1 R* _
Decision taken by7 D( t6 r+ F% I7 h& V8 i
ETF3 and confirmed% p* j, j) M. s# G
by CTL at its 38th- ?, u% b9 {; @5 {: t, S
meeting, in Toronto
% N7 `% b* t+ e6 b3 aQuestion:
2 R; w q5 x/ [ t% ]9 zWhere equipment is fitted with surge protection devices, is it acceptable for the circuits- p; E/ T$ g( e7 F
following the device to be a lower category than those preceding it?! Z; T7 b6 s' `2 ^' N/ D8 \- ?4 K1 D
Decision:
* f2 Q2 _8 Z- L! V( q0 l$ \It is acceptable, for example, for a Category III equipment to have circuits at Category II
' @( ^8 B, M4 C+ h; t* p* f. Mfollowing such a device.
9 G, \8 g0 v- I; I7 n KExplanation:
. m1 q) Q$ {# x% @The action of these devices is to remove excessive voltage spikes from the circuit and
) R4 B3 F# G2 b4 [! K: Itherefore, the Category of the circuit may be reduced accordingly. IEC 664 does have more, w+ T9 m0 Q) b5 n D9 }
tests to allow this. 5 sec. “spike” will destroy surge protection
8 ^1 B3 P7 Y; z' M0 {1 w7 f5 Z4 ^; ?6 M2 s) D
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