22
TnP-500 User Manual Wavecom
4. (cont...) Once your TnP-500 is set up correctly, select either the 0° (Positive) or the 180° (Negative) Phase to
test. Both phases should be tested, and after the first test, you can select ‘Retest’ to test the other phase.
5. When ready, press F3 to begin the test - the RCD will trip, and the time will be recorded in milliseconds.
6. The TnP-500 will display results for 5 seconds after the RCD is tripped, using a small internal 300mAh
battery. If the RCD (and therefore Mains Power Supply) is not reset by the time unit loses power, then the
result will be displayed when power is back on. Once the TnP-500 is powered back on by resetting the RCD,
you can press Enter to continue or F3 to retest.
7. You can now retest the other phase of the RCD, or simply print your tag and record your results.
RCD Ramp Testing
This test is designed to trip RCD devices using a ramping up current value, to determine the trip current of
the RCD device. This useful test allows the user to determine circuit leakage load/pre-loading of RCD circuit.
This can assist in determining nuisance tripping issues (ie. if the RCD is too sensitive) or determining RCD
performance if suspected faulty or inconsistent in performance. The TnP-500 has a nominal leakage current of
2mA, which should be added to the result of test.
E.g. if RCD tripped at 22mA, add 2mA to get a value of 24mA trip current.
To enter the RCD menu from Main Menu B, press the F3 button. Then, to set up a Ramp Test, press F2. Before
performing an RCD Ramp Test, the TnP-500 should be configured to ensure an accurate result.
Changing RCD Type:
Depending on the RCD, the RCD type needs to be selected from the options menu. These options change the
pass / fail values when performing RCD tests. Please make sure that you have the correct RCD type selected.
F1 - Sets RCD Type to Type 1
F2 - Sets RCD Type to Type 2
You will be promoted to enable or disable Portable RCD (PRCD) testing - unless you are testing a switchboard
RCD, turn PRCD on.
Conducting the Ramp Test
1. Complete a Visual Inspection (see page 22). If the device passed the Visual Inspection, continue with the
following instructions.
2. Navigate to Main Menu B, and press F3 to enter the RCD Menu, then press F2 to select Ramp Test
3. Press F2 to select your RCD Type, and turn Portable RCD testing on or off
4. Press F3 to begin the test - the TnP-500 will increase the current to the RCD until it trips, displaying the
current on screen.
5. The TnP-500 will display results for 5 seconds after the RCD is tripped, using a small internal 300mAh
battery. If the RCD (and therefore Mains Power Supply) is not reset by the time unit loses power, then the
result will be displayed when power is back on. Once the TnP-500 is powered back on by resetting the RCD,
you can press Enter to continue or F3 to retest.
6. You can now print your tag and record your results.
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