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GMC-I Messtechnik GmbH
8.7.5
Patient Leakage Current – IP
Definition
Patient leakage current is the current which flows to ground or PE
from the patient ports at the running device via the patient.
The AC and the DC component of the current is measured.
Direct Measuring Method
–
Measurement type: direct P1
– DUT mains plug (PC1) connected to test socket
– Probe to P1 terminal
Schematic Diagram
After activating test voltage, patient leakage current is measured
at the DUT (test probe P1) between PE (DUT mains plug) and the
short-circuited applied parts.
Power is supplied to the DUT via the test instrument. The device
under test (PC1) is operated with mains power.
The measurements must be performed with mains plug polarity in
both directions. Polarity is reversed with the
NL/LN
key.
Measurements are conducted with fixed fault condition
Normal
State
.
Wiring Diagram
– Special Case, Single Fault: Voltage at Applied Parts
Schematic Diagram
Wiring Diagram
Direct Measuring Method
–
Measurement type: direct APP
– DUT mains plug (PC1) connected to test socket
– APPs to APP sockets
– Probe to P1 terminal
Schematic Diagram
After activating test voltage, patient leakage current is measured
between PE (DUT mains plug) and the applied parts connected to
the APP sockets at the test instrument.
Power is supplied to the DUT via the test instrument. The device
under test (PC1) is operated with mains power.
The measurements must be performed with mains plug polarity in
both directions. Polarity is reversed with the
NL/LN
key.
Accessible conductive parts which are not connected to the
housing must be contacted with test probe P1.
Measurements are conducted with fixed fault condition
Normal
State
and test condition
None
.
Wiring Diagram
Single measurements,
rotary switch level: green
Sw
it
ch
Po
si
ti
o
n
Measure-
ment Type
With Mains
to Test
Socket
Measure-
ment Type
Without
Mains
to Test
Socket
Measuring Functions
I
P
Direct P1
I
P
Patient leakage current,
TRMS
I
P~
AC component
I
P=
DC component
U
LPE
Test voltage
Direct APP
Perm. conn. P1
Perm. conn.
APP
I
P
Summary of Contents for SECULIFE ST PRO
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