GEN7iB
24
SAFETY MESSAGES
SAFETY MESSAGES
2
Additional means of protection for single fault conditions
Accessible parts shall be prevented from becoming HAZARDOUS LIVE IN SINGLE
FAULT CONDITION. The primary means of protection (see Fig. 2.2) shall be supple-
mented by one of A, B, C or D. Alternatively, one of the single means of protection E or
F shall be used. See Fig. 2.2.
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Fig. 2.2 Acceptable arrangement of protective means against electric shock
Example:Ameasurementdeviceisspeciedas600VCATIIreinforcedinsulation,
with a maximum input voltage 1000 V DC.
Usingtheinformationabove,itcanbeconcludedthatthisspecicationinforms
theuserthatthemeasurementdeviceistestedoninputtochassisgroundforve
seconds at 3510 V RMS and impulse 6400 V. The maximum operating input voltage is
1000 V DC. This device is to be used to measure CAT II circuitry up to 600 V.