User Manual

30 GMC-I Messtechnik GmbH
8.6.1 Device Leakage Current – IG
Application
Measurement of device leakage current is required for electrical med-
ical devices in accordance with IEC 62353 (VDE 0751-1).
In the case of device leakage current as the sum of all leakage cur-
rent, all probe contact points must be contacted simultaneously.
Definition
Device leakage current is the sum of all leakage currents from the
housing, accessible conductive parts and application parts to PE.
Direct Measuring Method
DUT Mains Plug Connected to Test Socket
Test Probe P1 to P1 Terminals
Figure 1/5: The DUT (PC1) is operated with line voltage.
Protective conductor current is measured between the protective
conductor at the mains (test instrument supply power) and the
protective conductor terminal at the DUT via the DUT’s mains
cable. 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 connected to the housing,
as well as those which are not connected to the housing, must be
contacted with test probe P1.
If the DUT includes terminals for application parts, they must be
short-circuited and contacted with test probe P1 as well.
Differential Current Measurement
DUT Mains Plug Connected to Test Socket
Test Probe P1 to P1 Terminals
Figure 2/5: The DUT (PC1) is operated with line voltage.
Differential current which flows via the two mains conductors is
measured (current clamp measurement concept). The measure-
ments must be performed with mains plug polarity in both direc-
tions. Polarity is reversed with the NL/LN key.
Short-circuited terminals for application parts or accessible con-
ductive parts which are not connected to the housing must be
contacted with test probe P1.
Figure 3/5: The DUT (PC2) is operated with line voltage.
Differential current which flows via the two mains conductors is
measured (current clamp measurement concept). The measure-
ments must be performed with mains plug polarity in both direc-
tions. Polarity is reversed with the NL/LN key.
If the DUT includes terminals for application parts, they must be
short-circuited and contacted with test probe P1.
Alternative Measuring Method (equivalent leakage current)
DUT Mains Plug Connected to Test Socket
Test Probe P1 to P1 Terminals
Figure 4/5: After activating test voltage, leakage current is mea-
sured between short-circuited mains conductors L and N (DUT
mains plug) and accessible conductive parts (probe contact)
which are not connected to the housing.
If the DUT includes terminals for application parts, they must be
short-circuited and contacted with test probe P1 as well.
Switch
Setting
Meas.
Variant
Measuring Function
Single measurements, rotary switch level: green
Measurements at DUTs with line voltage
I
G
Direct
Diff.
Alt.
I
E
Device leakage current, TRMS
I
E~
AC component
I
E=
DC component
U
LN
Test vo lta ge
I
G