44 GMC-I Messtechnik GmbH
Alternative Measuring Method (equivalent leakage current)
– Alternative Measurement Type (P1)
– DUT mains plug connected to the test socket
– Test probe P1 to P1 terminals
Schematic Diagram, Protection Category I
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) which are not con-
nected to the housing.
If the DUT includes terminals for applied parts, they must be
short-circuited and contacted with test probe P1 as well.
Wiring Diagram, Protection Category I
Differential current measurement
– AT3-Adapter Measurement type
– DUT mains plug to AT3-IIIE test adapter
– Test probe P1 to P1 terminals
– AT3-IIIE probe to COM-V terminals
– AT3-IIIE test plug to test socket
Schematic Diagram
Measurement at the DUT with 3-phase mains connection via
AT3-IIIE adapter
Wiring Diagram
Measurement Method with Current Clamp Sensor
for Permanently Installed DUTs
– Clamp measurement type
– Clamp to COM-V (only with SECUTEST PRO or feature I01with
optional current clamp sensor)
Schematic Diagram
Measurement of device leakage current by closing the current
clamp sensor around the L and N conductors of the mains cable
for permanently installed protection category I devices under test
Wiring Diagram
Set Measuring Range at Current Clamp Sensor and Parameter at the
SECUTEST PRO
* Only with WZ12C
** Default value
SECUTEST PRO
Clamp SECUTEST PRO
Transformation Ratio
Parameter
Transformation
Ratio
(switch *)
Measuring
Range
Display Range
with Clamp
1 mV : 1 mA
WZ12C
1 mV : 1 mA 1 mA ... 15 A 0 mA ... 300 A
100 mV : 1 mA
SECUTEST CLIP
100 mV : 1 mA 0.1 ... 25 mA 0.00 mA ... 3.00 A
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