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) \: R5 q) A& X* [2 I+ F( {1 S+ A& F# b* a8 o
| Components6 w) ]3 r, Z5 \! B
| 14) L! ^; ]* W1 |7 v! ^
| 61010-1(ed.1);am1;am2
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4 a+ W6 l! C- m, `% c, _$ rStandard:
; \# X" v/ Y( I. w+ |IEC 61010-
' `& c- U* x2 T! }. R( \3 ~$ _. p1:1990+A1:1992+A2:1995
7 O; I+ I5 ~& X" J# eSub clause:' ^5 Y; N+ e9 h2 Y
144 `2 d% ^; n2 \/ \
Sheet n. 311
2 l: Z' k8 c9 P8 }! J" l, sPage 1(1)
8 o& U2 ~. l! D5 t+ g( V) {5 ESubject:
" u. X" a' B0 g1 |. i; {6 C+ l/ eComponents
/ A% e+ `8 s" vKey words:6 y4 F/ T- o& h* p4 o
- Installation
% \+ `6 ~7 t) A$ c! M/ o0 l- Category+ f) F5 s$ Y* D0 j) U4 H
Decision taken by3 j, r$ }5 K1 d2 j& e) {& J4 [
ETF3 and confirmed
/ T. t3 S2 Z' c7 \$ `$ Qby CTL at its 38th
% ]5 |- j* L+ D# I' H0 omeeting, in Toronto, O- W9 C% i4 T3 z v' R% [
Question:
! N- P1 }6 ^. H2 {' VWhere equipment is fitted with surge protection devices, is it acceptable for the circuits
0 R( r& M. q; f2 N) w" Pfollowing the device to be a lower category than those preceding it?
+ [, C9 `* i( ]Decision:
/ M& B" Z2 g. R6 T! u: @, jIt is acceptable, for example, for a Category III equipment to have circuits at Category II1 R% S% t/ W, `, g
following such a device.0 C# {8 s# J' Z' J
Explanation:
2 ~4 u, e. ?4 BThe action of these devices is to remove excessive voltage spikes from the circuit and
: t, h( G$ \ [2 S' P0 l+ Ytherefore, the Category of the circuit may be reduced accordingly. IEC 664 does have more
4 e; Z% R$ X* A/ N3 ltests to allow this. 5 sec. “spike” will destroy surge protection! S/ R% b: T) _+ \% e. o8 A
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