User Manual

20 GMC-I Messtechnik GmbH
8.3 Measuring Protective Conductor Resistance – RPE
1
10 A R
PE
measurements are only possible with line voltages of 115/230 V and line
frequencies of 50/60 Hz.
Application, Definition, Measuring Method
Protective conductor resistance is the sum of the following resis-
tances:
• Connector cable or device connector cable resistance
• Contact resistance at plug and terminal connections
• Extension cord resistance if applicable
Schematic Diagram
Protection Class I Devices, Connection to the Test Socket
Figure 1/3: Protective conductor resistance is measured between
the earthing contacts at the mains plug and the earthing contact
connected to the housing by contacting the housing with test
probe P1.
Schematic Diagram
Protection Class I Devices, Connection to the Test Socket
Special Case: Line Voltage at Test Socket (for testing PRCDs)
Figure 2/3: Protective conductor resistance is measured between
the earthing contacts at the mains plug and the earthing contact
connected to the housing by contacting the housing with test
probe P1.
Schematic Diagram
Protection Class I Devices, Special Case:
Permanently Installed DUTs
Figure 3/3: In the case of permanently installed DUTs, protective con-
ductor resistance is measured between the mains power earthing
contact and the earthing contact connected to the housing by
contacting the housing with test probe P1.
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 devices.
• As a 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
Setting Measuring Parameters
1
SECUTEST BASE10/SECUTEST XTRA (feature G01):
measurement cannot be performed with 10 A AC for this measurement type.
2
The selected offset value is permanently saved and used in measurements per-
formed in the AUTO switch positions.
Switch
Setting
Meas.
Variant
Measuring Function
Single measurements, rotary switch level: green
Measurements at voltage-free objects
R
PE
R
PE
Protective conductor resistance
Ip Test current (200 mA)
SECUTEST B
ASE10/XTRA: 10 A
1
R
PE
Measuring Parameter Meaning
Measurement type
PE(PD) – P1 Testing is conducted between the two protective conduc-
tor terminals: at the test socket and test probe P1.
Active: PE(PD) – P1
1
Same as PE(PD) – P1 with line voltage at the socket
(PRCDs)
PE(mains) – P1
Permanently connected
DUTs
Testing is conducted between the ground terminal at the
mains and test probe P1.
I(set)
+200 mA DC Test current: positive direct current
-200 mA DC Test current: negative direct current
200 mA (DC) Test current: direct current whose polarity is
reversed every 2 seconds
200 mA (AC) Test current: alternating current
10 A Test current: 10 A
SECUTEST B
ASE10/XTRA only (feature G01):
f – only at 200 mA (AC)
50 to 200 Hz Test frequency
Offset
> 0 to < 2 
2
Zero balancing for a selected reference point