GMC-I Messtechnik GmbH 35
8.7 Measuring Leakage Current
Measurement with DUT Connected to Line Voltage
It’s absolutely essential to assure that the device under
test is operated with line voltage during performance of
leakage current measurements with the direct or differential
current method. Exposed conductive parts may conduct
dangerous touch voltage during testing, and may not
under any circumstances be touched. (Mains power is
disconnected if leakage current exceeds approx.
10 mA.)
Frequency response in
accordance with the
figure to the right is
taken into consider-
ation for all leakage
current measure-
ments (IPE, IT, IE, IP)
(direct, differential,
alternative).
10 10
2
10
3
10
4
10
5
10
6
+20
0
–20
–40
–60
Frequency (f) in Hz
Relative magnitude (dB): 20 log
U(f)
U(f=10)
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