DSH 300 Protective Impedance
http://decisions.iecee.org/icons/ecblank.gifDSH 300
Protective Impedance
6.5.3
61010-1(ed.1);am1;am2
Standard:
IEC 61010-1:1990
+A1:1992+A2:1995
Sub clause:
6.5.3
Sheet n. 300
Page 1(1)
Subject:
Protective Impedance
Key words:
- Shock
- Impedance
- Protective
Decision taken by
ETF3 and confirmed
by CTL at its 38th
meeting, in Toronto
Question:
Where a component acts as protective impedance in single fault condition, should it be rated
for this function? An example is a component in an accessible secondary circuit which may
be made hazardous live by the failure of a creepage or clearance distance.
Decision:
Such components should be rated for the single fault condition.
Explanation:
The safety of the user will be dependent on the operation of these devices. It will, however,
be preferable for the design to avoid this circumstance as the integrity of the components is
not defined.
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