DSH 447 Disconnect device

小米

广东安规检测
有限公司提供：

小型摆管淋雨试验机

IPX5X6X7喷水试验机

1000L恒温恒湿箱

各种试验指现货

可程式恒温恒湿试验箱

水平垂直燃烧机

自动卷线器试验机

耐划痕试验机

各种灯头量规现货

灼热丝试验机现货

GB1002插头量规

IPX1-X7淋雨现货

IEC61347/UL935镇流器热试验箱

灯具防风罩

IK冲击试验机

UL498插头插座量规

VDE0620插头插座量规

稳定性试验台

家电温升测试角

针焰试验机现货

热电偶焊机现货

家电125mm试验指

E12灯头量规

无绳壶无绳电熨斗插拔寿命试验机

IEC60335试验指甲

DSH 447

Disconnect device

3.4.6 " M  e+ Z' g3 W2 h1 b4 i! k

60950-1(ed.1) 1 x/ N: K  G+ I! x  e

' A- }4 T, o1 i: LStandard:
; T% Z5 v& x. U/ @6 aIEC 60950-1:2000, 1st ed
# g: [! x/ V+ F: f  X6 J' HClause:
% I, l7 o6 n- J/ D* V; U+ `3.4.6
7 R+ L7 ~* ?& N. w5 R, p( FSheet No.
) Z( X! ]5 u8 M( @447
$ e1 j  b8 }& {9 @/ }# q  n( ISubject:
% V: [6 q' ?) u9 m7 T- o7 a4 ~# |Disconnect device
Key words:
: `% V; `8 t4 ~& w( ADC mains supply
: Z2 V, q, Q: }: h$ J% oDecision taken at the
+ u+ _  ?" P( R- v! J40th meeting 2003
Question:
Equipment for building-in is supplied by power supply which has an output rating 24 Vdc, 40 A.
2 F' n( `3 \) TThe power supply is 40 m far from end use equipment which contains above mentioned unit.
  b. W6 O2 X8 y( |" c8 Pa) Do other test houses require disconnect device for such DC supplied unit?
b) Do other test houses require contact separation of disconnect device 3,0 mm if supply voltage is
only 24 Vdc.
Decision:
a) Per 3.4.1: A disconnect device or devices shall be provided to disconnect the equipment from the
mains supply for servicing.
(This device can be an easily removable fuse for DC-mains-supply with non hazardous voltages).
b) Disconnect devices in DC-Mains Supplies with not hazardous voltages shall have a contact
separation equal to the clearance for basic insulation.
! Z! i4 p  M) d. m# g

: F  h1 d' b1 [