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|  DSH 447* y' F. l9 H! [' P/ T
1 c' m" I) B: W' e
| Disconnect device
% t1 Z3 s6 E( x( |4 |7 k | 3.4.6
1 c5 d: n& D7 j* G | 60950-1(ed.1)
1 r d# {3 }$ V* a |
- @2 r2 c. O( m4 i( v3 M
Standard:* z; `) _+ P" |8 B
IEC 60950-1:2000, 1st ed
# d) r1 m$ ^) X' E v& F+ lClause:
1 }' P- ]" x# \/ r3.4.6
8 G- t6 d' t* X4 |+ PSheet No.
% W+ @+ ]2 D1 N447
) [) _# P0 @. G5 p1 eSubject:% w; E* ^: e4 `& C5 m9 C! {( Y! ]
Disconnect device" j$ ~3 ?/ ^% t
Key words:
: ]& w7 X) a [. CDC mains supply& _: U2 [/ p I' o
Decision taken at the
0 c* R% F% u3 w& a, m' H40th meeting 2003, A$ X% y- S4 `( r+ d; D3 V
Question:, X6 E/ F3 t/ V
Equipment for building-in is supplied by power supply which has an output rating 24 Vdc, 40 A.& w2 Z/ d, ~) r2 a( |
The power supply is 40 m far from end use equipment which contains above mentioned unit.3 A! H8 ?8 Z* N( ]- O5 I- Q# ~5 K
a) Do other test houses require disconnect device for such DC supplied unit?+ n5 d1 T8 P& e6 v5 @
b) Do other test houses require contact separation of disconnect device 3,0 mm if supply voltage is; |, S; ~; B- n. ?$ {1 t8 u2 e
only 24 Vdc.
/ y+ A& R) x( V( A" y7 B9 ?) GDecision:
6 T& r* _# `4 R5 l2 G$ }a) Per 3.4.1: A disconnect device or devices shall be provided to disconnect the equipment from the
7 w7 d" M0 n0 w2 L8 Amains supply for servicing.
2 Q# o7 X" ]$ |5 @(This device can be an easily removable fuse for DC-mains-supply with non hazardous voltages).8 z4 N" u1 M5 P5 ^# ~# Q
b) Disconnect devices in DC-Mains Supplies with not hazardous voltages shall have a contact& i2 W) z7 U: `" ~) X
separation equal to the clearance for basic insulation.
, u% f& ` t/ i5 O7 ] J9 n) X2 f3 ?: n6 c2 m
: Y c; B! @( f- H/ K# j$ U' }
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发表于 2012-11-6 16:52
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