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Hi All,
I am a beginner for 601.
I have a question about the insulation requirements between F-type applied part and enclosure, which the standard states:
1) In the case of an F-TYPE APPLIED PART containing no voltage difference, the insulation
between the PATIENT CONNECTIONS and the ENCLOSURE will only be stressed to the MAINS
VOLTAGE in the case of a fault in other equipment connected to the PATIENT.
This condition rarely occurs; furthermore this insulation is not normally subject to the
transient overvoltages found in the MAINS PART. In view of the above, the insulation
necessary between the APPLIED PART and the ENCLOSURE for the case quoted, need only
satisfy the requirements for BASIC INSULATION.
2) In the case of an F-TYPE APPLIED PART containing parts with voltage difference, the
connection of a PATIENT CONNECTION to earth via an earthed PATIENT (NORMAL CONDITION)
could subject the insulation between other parts and the ENCLOSURE to the whole of the
voltage within the APPLIED PART.
Since this voltage appears in NORMAL CONDITION, even though infrequently, the relevant
insulation should satisfy the requirements for DOUBLE INSULATION or REINFORCED INSULATION.
Can somebody clarify this?
Thanks
I am a beginner for 601.
I have a question about the insulation requirements between F-type applied part and enclosure, which the standard states:
1) In the case of an F-TYPE APPLIED PART containing no voltage difference, the insulation
between the PATIENT CONNECTIONS and the ENCLOSURE will only be stressed to the MAINS
VOLTAGE in the case of a fault in other equipment connected to the PATIENT.
This condition rarely occurs; furthermore this insulation is not normally subject to the
transient overvoltages found in the MAINS PART. In view of the above, the insulation
necessary between the APPLIED PART and the ENCLOSURE for the case quoted, need only
satisfy the requirements for BASIC INSULATION.
2) In the case of an F-TYPE APPLIED PART containing parts with voltage difference, the
connection of a PATIENT CONNECTION to earth via an earthed PATIENT (NORMAL CONDITION)
could subject the insulation between other parts and the ENCLOSURE to the whole of the
voltage within the APPLIED PART.
Since this voltage appears in NORMAL CONDITION, even though infrequently, the relevant
insulation should satisfy the requirements for DOUBLE INSULATION or REINFORCED INSULATION.
Can somebody clarify this?
Thanks