|
|
|  DSH 423! ~0 |/ ~1 d$ }+ I
' K$ h5 t+ G8 Q; c: D3 ]
| Use of a PTC as a protective device
% X: ^! d' Z/ V5 `5 k& @. j9 C | 57.9 b)
8 w- F# g& n, u( Q | 60601-1(ed.2);am1;am27 K, _: t4 {% F: m) }
|
5 z B; m. @! H1 U& V
Standard(s)- (year and edition):
' a% ]5 t$ _* kIEC 60601-1:1988 Ed.2 Am1+Am2
( K+ {9 i' G& T; L! B: k9 pSub clause(s): 57.9 b) 1 B- s T# j* Q: O' t# d
Sheet n°: DSH-423" T* y D6 f( K' X6 O/ w* U
Subject: Use of a PTC as a protective device
8 p( Q+ t0 G- h& N1 ?3 _Key words: PTC, protective device, Mains supply transformers, overload9 U Z0 x2 v1 V; [) J
Confirmed by CTL at its 39th meeting, in Cologne
]4 x' G! D6 d6 c3 mQuestion:4 m' L! a+ A. t& g* D
Is it permitted to use a PTC as protective device and what should be the overload test?1 h6 B, Z* H* r* }$ ~5 T6 R7 b
Decision:! }$ v# h+ w2 j+ W) E" w8 d
Where a PTC is used as a protective device for a mains supply transformer, the requirements for
0 Q$ T N- U2 D& bTHERMAL CUT-OUTS as required by sub-clause 57.9 shall be applied.
9 }, `& g4 @: A% G k+ yThey shall be in accordance with International or National standards which address the reliability/ E& F. e6 s4 \1 z
of these components, e.g. as specified in IEC 60950 Amendment 4 clause 2.11 (Ed. 2).$ Z1 k$ C& e7 Q+ L+ w$ L
( g- O* i- ^/ L6 x+ E1 I
|
本帖子中包含更多资源
您需要 登录 才可以下载或查看，没有账号？注册安规
x
|
/1 
|关于安规|小黑屋|安规QQ群|Archiver|手机版|安规网
( 粤ICP13023453-10 ) 
窥视卡
雷达卡
发表于 2012-11-5 10:57
提升卡
置顶卡
沉默卡
喧嚣卡
变色卡
抢沙发
千斤顶
显身卡