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|  DSH 447; L" v' Y, c, _ @) ?
1 F# R, S( u" P9 w7 o, T( t: I
| Disconnect device3 u3 `) X* b/ s8 P* t
| 3.4.6
, {1 |0 ] b( W! Q& ?* D | 60950-1(ed.1)8 i6 k/ j) k; u. O; k& \
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9 d4 n0 Z3 y9 C! M* H+ U+ oStandard:
7 x4 q( U* Y* KIEC 60950-1:2000, 1st ed& M6 X; Q- s5 n" W" |+ o# Z; \1 l7 @
Clause:
* @; H, f" T f% h, F3.4.63 F* ]$ I. e; i1 x \
Sheet No. P# ]; t. t1 f/ X- r0 j3 n6 p
447
" O) t2 O' S. N: V6 g& i- eSubject:
8 \% b* @3 `1 g% n y$ JDisconnect device
, B- z! ^: K- f7 U2 \. ^% Z) tKey words:
: {: g: _7 M; P# ]4 t. HDC mains supply
. D) h$ {5 u; B1 ]6 u& @6 g, s! {7 gDecision taken at the% {7 j7 B% I+ o" _# j1 K k
40th meeting 2003 j6 u Y" j2 E. w* Q
Question:7 q9 t% d1 q8 n8 _9 }, p+ p
Equipment for building-in is supplied by power supply which has an output rating 24 Vdc, 40 A." [8 g9 b7 f* c- |% ^) I( x% J
The power supply is 40 m far from end use equipment which contains above mentioned unit." F' t7 G# V% |2 b# U
a) Do other test houses require disconnect device for such DC supplied unit?
1 l& L+ d2 b" D2 S; Sb) Do other test houses require contact separation of disconnect device 3,0 mm if supply voltage is
/ K: ~" }) n- }$ Ionly 24 Vdc.
$ y$ T9 M |8 j7 o" Z9 pDecision:
5 q1 [7 w, I M& \8 ?a) Per 3.4.1: A disconnect device or devices shall be provided to disconnect the equipment from the- ]# D+ f1 J$ Y. r" j# Z
mains supply for servicing.
& }7 |. A( X% H1 d3 M8 V2 J(This device can be an easily removable fuse for DC-mains-supply with non hazardous voltages).1 V. M5 ?) r/ i5 }3 n3 g$ o
b) Disconnect devices in DC-Mains Supplies with not hazardous voltages shall have a contact
0 x* i4 n; j1 H0 yseparation equal to the clearance for basic insulation.! ^1 X8 U" S4 g; s" M* x2 P: i
1 O o% c4 m& Z7 x, A# W4 D3 O' s% ^& _' d6 F
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