User Manual

GMC-I Messtechnik GmbH 43
Alternative Measuring Method (equivalent leakage current) 
– Alternativ
e Measurement Type (P1) 
– DUT mains plug connected to the test socket 
– Test probe P1 to P1 terminals
Schematic Diagram, Protection Class I
<help_ig_alt_p1>
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 Class I
Differential Current Measurement 
– AT3-Adapter measurement type

– DUT mains plug to AT3-I I I E test adapter
– Test probe P1 to P1 terminals
– AT3-I I I E probe to COM-V terminals 
– AT3-I I I E test plug to test socket
Schematic Diagram
Measurement at the DUT with 3-phase mains connection via
AT3-I I I E adapter
Wiring Diagram
Measurement Method with Current Clamp Sensor 
for Permanently Installed DUTs 
– Clamp m
easurement type 
– Clamp to COM-V (only withSECUTEST PRO or feautureI01 
with optional WZ12C current clamp sensor)
Schematic Diagram
Measurement of device leakage current by closing the current
clamp sensor around the L and N conductors in the power cable
of the mains for permanently installed protection class I devices
under test
Wiring Diagram
Set Measuring Range at Current Clamp Sensor and Parameter at
the
SECUTEST PRO
SECUTEST PRO Current Clamp Sensor SECUTEST PRO
Transformer Ratio
Pa
rameter
Transformer 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
* only with WZ12C
** Default value