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4 u1 g9 [" m( U) o+ @
6 M/ [2 l$ I, C: I9 O | Components% z" [: A% J7 W- \7 t. A
| 14
8 E" @. ?4 h2 `$ B0 a | 61010-1(ed.1);am1;am2' d- W+ c4 d- w4 N1 B
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Standard:, t! z: z# d: G+ v3 F) s
IEC 61010-$ y8 K X& e6 E) _! V6 }
1:1990+A1:1992+A2:1995
+ g0 g4 d* X1 I$ {Sub clause:
* w- ~6 C0 Y9 L14
. u( g0 R3 X; {+ }Sheet n. 3111 ^2 J% F) S& ^: P7 R
Page 1(1)% E8 |: j9 x! B" o% l
Subject:
! j' _. l' a- i" [( V- z) d0 }7 IComponents
; Y, ^" t! T7 @1 f, S8 zKey words:
3 L5 o8 ?+ U: _* `5 F7 C, S& l- Installation9 O1 K8 _7 u) Z9 b2 b
- Category1 Y' T. Q- R3 G* K6 S# r
Decision taken by
. V; G9 @* m& Z3 _( m; OETF3 and confirmed, l8 x/ w: ]4 p) s6 d1 d
by CTL at its 38th( c0 w7 R+ g4 E4 o
meeting, in Toronto% l# _& I& I0 k& X" w
Question:: }! m) V+ k9 c$ v2 i
Where equipment is fitted with surge protection devices, is it acceptable for the circuits" G$ x6 | ^/ r- ^2 ]; x' X
following the device to be a lower category than those preceding it?
3 p4 t& U' ]% i& c4 WDecision:
: B# O/ }/ q" U1 j, a' ~It is acceptable, for example, for a Category III equipment to have circuits at Category II$ v% D; I% ]1 q* M# Q' k
following such a device.
( m9 d0 a; B$ e4 W+ d! @2 A6 QExplanation:
* ?' C! s& k% ]" F$ w) |1 FThe action of these devices is to remove excessive voltage spikes from the circuit and
7 T& S; Y/ U6 v3 ytherefore, the Category of the circuit may be reduced accordingly. IEC 664 does have more9 P9 Q' H3 m! c
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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