36 GMC-I Messtechnik GmbH
Alternative Measuring Method (equivalent leakage current)
– Alternative measurement type (P1)
– DUT mains plug to test socket
– Test probe P1 to P1 terminals
Schematic Diagram
After activating test voltage, leakage current is measured between
short-circuited mains conductors L and N (DUT mains plug) and
accessible conductive parts (probe contact). The RMS, the AC or
the DC component of the current is measured.
Wiring Diagram
Direct Measuring Method for Permanently Installed DUTs
– Permanent connection measurement type
– Test probe P1 to P1 terminals
Schematic Diagram
The DUT is operated with line voltage from a permanent installa-
tion. Leakage current is measured between the protective con-
ductor at the mains and the output sockets for safety extra-low
voltage at the DUT, one after the other, with the help of the test
probe. Furthermore, accessible, conductive parts which are not
connected to the housing must also be contacted.
Wiring Diagram
Alternative measuring method with 2-pole measurement (P1–P2)
– Alternative measurement type (P1 - P2)
– Test probe P1 to P1 terminals
– Test probe P2 to P2 terminals
Schematic Diagram
Insulation resistance is measured between external conductive
parts which can be contacted with test probe P2 and are not con-
nected to the housing, and the housing with test probe P1.
Wiring Diagram
Setting Measuring Parameters for IB
Measuring
Parameter
Meaning
Measurement
Type,
Suitable for
DUT Connection via
Direct Direct Measuring Method Test socket, AT3 adapter
(AT3-IIIE, AT3-IIS, AT3-IIS32),
AT16DI/AT32DI
Differential Differential current
measurement
Test socket
Alternative (P1) Equivalent leakage current
method
Test socket, AT3 adapter
(AT3-IIIE, AT3-IIS, AT3-IIS32),
AT16DI/AT32DI, VL2E
Permanent
connection
Permanently installed DUT Permanent connection
Alternative
(P1–P2)
Equivalent leakage current
method with SECUTEST PRO or
feature H01
No connection, PC3:
2-pole measurement between
test probes 1 and 2
(see section 6.6)
Polarity – for direct and differential measurement types only
L/N or N/L Selection of polarity for mains voltage to the test socket
U(set) – for alternative measurement type only
110 V, 115 V,
220 V, 230 V, 240 V
Selection of a line voltage for synthetic test voltage
Frequency(set) – for alternative measurement type only
48 Hz ... 400 Hz Selection of a line frequency for synthetic test voltage
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