Gossen Metrawatt GmbH
47
Wiring Diagram
Protection Class I DUTs
Special Case: Permanently Installed DUTs
–
Measurement type PE(mains) - P1
– Test probe P1 to P1 terminals
Schematic Diagram
In the case of
permanently installed DUTs
, protective conductor resis-
tance is measured between the mains power earthing contact
and the earthing contact connected to the housing by contacting
the housing with test probe P1.
Wiring Diagram
Measurement via current clamp sensor at permanently installed
DUTs (only with test instruments including features I01 and G01)
–
Measurement type PE(mains) - P1 clamp
– Test probe P1 to P1 terminals
– Clamp to COM-V (only with optional current clamp sensor)
Schematic Diagram
Measurement of test current by closing the current clamp sensor
around mains PE and contacting the housing with test probe P1
for permanently installed protection class I devices under test
Wiring Diagram
Set measuring range at clamp and parameters at instruments with
feature G01
This measurement type can only be selected if test current is set
to 10 A AC.
* Only with WZ12C
2-Pole Measurement at Permanently Installed DUTs
(only test instruments with feature H01, e.g. SECUTEST ST PRO)
–
Measurement type P1 - P2
– Test probe P1 to P1 terminals
– Test probe P2 to P2 terminals
Schematic Diagram
PE at the mains connection is contacted with the second test
probe instead of via the test instrument’s mains plug.
Wiring Diagram
Resistance is measured:
•
Between each exposed
conductive part of the housing
and the
earthing contacts at the mains and the device plug (if a
removable mains connector cable is used), or the protective
conductor terminal for permanently installed DUTs.
•
As 4-pole measurement
•
Between the earthing contacts at the mains plug and the
earthing contacts at the device plug for
device connector cables
•
Between the earthing contacts at the mains plug and the
earthing contacts at the coupling socket for
extension cords
SSECUTEST 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
Summary of Contents for SECULIFE ST BASE 25
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