Gossen MetraWatt SECUTEST PRO - Page 39

GMC-I Messtechnik GmbH 39
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 Class 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 Class 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 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 of the mains for
permanently installed protection class I devices under test
Wiring Diagram
Set Measuring Range at WZ12C and at the SECUTEST PRO
SECUTEST PRO WZ12C Clamp Meter SECUTEST PRO
Transformation
Ratio
Parameter
Switch Measuring
Range
Display Range
with Clamp
1:1
1 V / A
1 mV / mA 1 mA ... 15 A 0 ... 300 A