Measuring Protective Conductor Resistance - Rpe - Gossen MetraWatt SECUTEST PRO Manual

8.5 Measuring Protective Conductor Resistance – RPE
Single measurements, rotary switch level: green
Measure- Measure-
ment Type, ment Type,
With Mains Without
to Test Mains
Socket to Test
Socket
Passive:
PE(TS) - P1
Active:
4
PE(TS) - P1
R
PE
PE(mains) - P1
PE(mains) - P1
3
clamp
P1 - P2
1
SECUTEST BASE10/PRO (feature G01): 10 A-RPE measurements are only
possible with line voltages of 115/230 V and line frequencies of 50/
60 Hz.
2 nd
Connection for 2 test probe for 2-pole measurement with SECUTEST
PRO only (or instrument with feature H01)
3
Can only be selected if the IP(set) parameter has been set to 10 A~,
with SECUTEST PRO only (or instrument with feature G01)
4)
Can only be selected with SECUTEST BASE or if the IP(set) parameter has
been set to 200 mA.
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
• Resistance of the extension cord if applicable
Protection Class I Devices
– Measurement type PE(TS) - P1 (passive)
– DUT mains plug to test socket
– Test probe P1 to P1 terminals
Schematic Diagram
Protective conductor resistance is measured between the earth-
ing contacts at the mains plug and the earthing contact con-
nected to the housing by contacting the housing with test probe
P1.
GMC-I Messtechnik GmbH
Measuring Functions
R Protective conductor resistance
PE
Ip Test current: 200 mA
Ip Test current: 10 A
2
Wiring Diagram
R
PE
Measurement of RPE at Single-Phase Extension Cords with EL1
– Measurement type PE(TS) - P1 (passive)
– Extension cord plug connected to test socket
– EL1 to P1 terminals
Schematic Diagram
1
Wiring Diagram
Protection Class I Devices
Special Case: Line Voltage at Test Socket (for testing PRCDs)
– Measurement type PE(TS) - P1 (active)
– DUT mains plug to test socket
– Test probe P1 to P1 terminals
Schematic Diagram
Protective conductor resistance is measured between the earth-
ing contacts at the mains plug and the earthing contact con-
nected to the housing by contacting the housing with test probe
P1.
23