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TnT RCD
User Manual
Wavecom
TnT RCD
User Manual
Wavecom
RCD Trip Time Testing:
This test is designed to trip RCD devices at a fixed current and to determine the trip time of the RCD device.
During an RCD Trip Time test, the TnT RCD injects a true fault current value using a real-time compensation
calculation of the actual voltage at the time of test, delivering a true and accurate trip current. The TnT RCD will
measure the time the RCD takes to trip in milliseconds, and display it on the screen. This function is factory set
to 30mA for fast testing, but the user can set the current to x0.5, x1.0 or x5.0 using the RCD Multiplier.
For example:
30mA * 0.5 =15mA
30mA * 1.0 = 30mA - This also is effective on any set test current of the RCD tester from 5mA to 500mA output.
30mA * 5.0 = 150mA
These tests should result in no-trip, trip & fast trip times respectively.
To enter the RCD menu from Main Menu B, press the F3 button. Then, to set up a Trip Time Test, press F1. Before
performing an RCD Trip Time Test, the TnT RCD should be configured to ensure an accurate result.
RCD Test Options:
To adjust the Trip Time test options, press F3 . This allows the user to set the trip current level, 5mA to 500mA.
The RCD type can also be select here depending whether the unit is a Type I or Type II RCD. From the options
menu, press F2 to change the current level and F3 to change the RCD type.
Adjusting the current level:
The TnT RCD displays and maintains the last set trip current value. If the user wishes to change the value of the
trip current the following steps enable the changes. Press F2 from the options menu to display test current.
F1 - Raises the trip current in 1mA increments to 500mA. Hold the button and the value will scroll faster the longer it is
pressed. Once 500mA limit is reached the value will then loop over and start again from 0mA
F2 - Decreases the trip current in 5mA increments. Hold the button and the value will scroll faster the longer it is pressed.
Once 0mA limit is reached the value will then loop over and start again from 500mA.
Enter - Sets the selected current for the next trip time test. The TnT RCD will then return to the current trip time test
screen.
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 Trip Time Test
1. Complete a Visual Inspection. For details refer to the First Test section. If the device passed the Visual
Inspection, continue with the following instructions, if not, refer to the First Test section.
2. Navigate to Main Menu B, and press F3 to enter the RCD Menu, then press F1 to select Time Test
3. Press F3 to enter the Time Test options menu, to ensure your TnT RCD has the correct settings for the type
of RCD (cont...)
4. (cont...) Once your TnT RCD 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. TnT RCD testers will switch to battery power (if charged) and stay on, but will need to be Mains Powered
again to conduct further RCD tests.
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 (RCD is too sensitive) or determining RCD performance if
suspected faulty or inconsistent in performance. The TnT RCD 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 TnT RCD 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. For details refer to the First Test section. If the device passed the Visual
Inspection, continue with the following instructions, if not, refer to the First Test section.
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 TnT RCD will increase the current to the RCD until it trips, displaying the
current on screen.
5. TnT RCD testers will switch to battery power (if charged) and stay on, but will need to be Mains Powered
again to conduct further RCD tests.
6. You can now print your tag and record your results.
