DSH 419 Internal battery for back-up power

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DSH 419 5 K1 D& u; I0 X# {2 ] # F- L, {, `/ J5 N# o; y' v

Internal battery for back-up power ; X3 B0 \, {( J/ G: x. o

6.8.2, 6.8.2 e) + H: c6 v, q9 i; O( |

60601-1(ed.2);am1;am2

Standard(s)- (year and edition):
& d$ C3 @) I4 Z; D6 B' i: A3 S) ^IEC 60601-1:1988 Ed.2 Am1+Am2
Sub clause(s): 6.8.2 6.8.2 e)
0 c' M/ d7 l" n3 ^/ P% fSheet n°: DSH-419
* g1 Z0 V/ X$ ]& OSubject: Internal battery for back-up power
: C% T3 h2 w! P- P6 `: ?Key words: Internal battery, Protective earth terminal
Ce confirmed by CTL at its 39th meeting, in Cologne
Question:
The requirement in this clause seems to be a little unreasonable. Assume for example,
EQUIPMENT with an internal battery intended for back-up power in the event of a failure of the
- h2 s* s) n2 b3 F: ?: N/ _& j8 mSUPPLY MAINS as a power source. Further, how can one say whether the external
1 [1 q% u8 z0 g: o& mPROTECTIVE EARTH CONDUCTOR arrangement is in doubt or not?
Decision:
! j5 X  w& E9 [* D2 ?: zThe Instructions for use shall include for CLASS I EQUIPMENT the following statement:
- L- j; b+ R- y# V4 a“WARNING: THIS EQUIPMENT MUST ONLY BE CONNECTED TO A SUPPLY MAINS
+ ~( F  i5 L! h( G  ^& H6 s5 CWITH PROTECTIVE EARTH.”
' F" Z* D3 Z# Q

) D% r: N. Y5 O) u5 ]