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# t2 g) ~$ n5 ?1 }$ E
2 b- ?1 G) ?* w7 K/ v | Components- a1 m5 ~! H; K( _/ a$ U& d
| 14
1 W& }; `, x6 w K( }6 I | 61010-1(ed.1);am1;am2
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: p3 P+ R, L; q1 R" IStandard:6 D1 ^$ J+ r0 q$ D
IEC 61010-
t% Z) x# D/ a1:1990+A1:1992+A2:1995, K; D W' G5 V0 n
Sub clause:
$ j4 ~3 \* b$ h9 d7 h14: W9 d- S B q4 W$ f7 V0 k
Sheet n. 3116 \ I& s9 L; U6 V$ l* ~# b* q* i
Page 1(1)8 e# T! I. I3 W+ B9 N4 z
Subject:* R: R, F/ I1 Z& m
Components
; a9 ?; m3 H; f) Y T) z# e0 KKey words:
! a) ^( U3 P E8 n, i2 M- Installation/ A4 c7 u+ \9 i4 ?+ G
- Category
' H- `( ~8 c+ WDecision taken by
: |2 X! V6 `4 IETF3 and confirmed @( v3 u$ P1 S8 [! |
by CTL at its 38th0 |' @+ \. Z, @" M0 E' u* o" i; | |
meeting, in Toronto
- X0 E0 z" u, C" ~3 `2 K+ ?) @Question:. o4 _3 ~# q$ n5 b! z
Where equipment is fitted with surge protection devices, is it acceptable for the circuits
& |1 Y$ h; H( e2 y) Sfollowing the device to be a lower category than those preceding it?9 A( @ \$ w/ W c
Decision:
6 G; g& l1 D/ o2 [- N3 OIt is acceptable, for example, for a Category III equipment to have circuits at Category II
4 |* w& \: C5 {3 a/ Cfollowing such a device.
- V+ M' P1 f. F0 _: TExplanation: C$ Q: K5 m5 B' h5 t
The action of these devices is to remove excessive voltage spikes from the circuit and
, W+ O1 x8 ~6 R8 n- d4 Q B/ Stherefore, the Category of the circuit may be reduced accordingly. IEC 664 does have more
; J4 l! Y- y) d. { `. Etests to allow this. 5 sec. “spike” will destroy surge protection7 `% a7 s0 E" T% E* V
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发表于 2012-9-19 14:45
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