Gossen Metrawatt GmbH 55
Wiring Diagram
Alternative Measuring Method (equivalent leakage current)
– Alternative measurement type
– DUT mains plug (protection class I) to test socket
Schematic Diagram
After activating test voltage, leakage current is measured via the
DUT’s mains cable between short-circuited mains conductors L
and N and the protective conductor terminal at the DUT.
Wiring Diagram
Connection of 3-Phase DUTs (only with feature I0, e.g. SECUTEST
ST PRO, and with optional AT3-IIIE test adapter)
– AT3-Adapter measurement type
– DUT mains plug to AT3-IIIE test adapter
– AT3-IIIE probe to COM-V terminals
– AT3-IIIE test plug to test socket
Schematic Diagram
Measurement of the DUT with 3-phase mains connection via
AT3-IIIE adapter
Wiring Diagram (AT3-IIIE probe to COM-V)
Measurement of Protective Conductor Current via Current Clamp
Sensor with Voltage Output for Permanently Installed DUTs
(only with feature I0, e.g. SECUTEST ST PRO, and with optional
current clamp sensor)
– Clamp measurement type
Schematic Diagram
Measurement of protective conductor current by closing the cur-
rent clamp sensor around mains cable PE for permanently
installed protection class I DUTs
Wiring Diagram (current clamp sensor to COM-V)
Set Measuring Range at Clamp Meter and Parameter at SECUTEST ST
PRO
*Only with WZ12C
** Default value
SECUTEST ST PRO Clamp SECUTEST ST 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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