17
W
Warning
• Test the connection between the N-conductor and earth before starting the test. A
voltage between the N-conductor and earth may influence the test.
• Leakage currents in the circuit following the residual current protection device may
influence measurements.
• The displayed fault voltage relates to the rated residual current of the RCD.
• Potential fields of other earthing installations may influence the measurement.
• Equipment (motors, capacitors) connected downstream of the RCD may cause
considerable extension of the tripping time.
Note:
If the L and N terminals are reversed, the tester will auto-swap them internally and
continue testing. If the tester is configured for UK operation, testing will halt and you will
need to determine why the L and N are swapped. This condition is indicated by arrows
above or below the terminal indicator symbol (
).
Type A RCDs do not have the 1000 mA option available.
To measure RCD tripping time:
1. Turn the rotary switch to the
position.
2. Press F1 to select the RCD current rating (10, 30, 100, 300, 500, or 1000 mA).
3. Press F2 to select a test current multiplier (x ½, x 1, x 5, or Auto). Normally you will use
x 1 for this test.
4. Press F3 to select the RCD test-current waveform:
– AC current to test type AC (standard AC RCD) and type A (pulse-DC sensitive RCD)
– Half-wave current to test type A (pulse-DC sensitive RCD)
– Delayed response to test S-type AC (time delayed AC RCD)
– Delayed response to S-type A (time delayed pulse-DC sensitive RCD)
5. Press F4 to select the test current phase, 0° or 180°. RCDs should be tested with both
phase settings, as their response time can vary significantly depending on the phase.
6. Press and release
. Wait for the test to complete.
• The primary (upper) display shows the trip time.
• The secondary (lower) display shows the fault voltage (N to PE) related to the rated
residual current.
• If the trip time is according to the appropriate standard of the RCD, the RCD indicator
displays. For more information, see Maximum Trip Time Table on page 31.
To measure RCD tripping time for a custom RCD setting – VAR mode:
1. Turn the rotary switch to the
position.
2. Press
to select the VAR current rating. The current custom setting shows on the
primary display. Use the
arrow keys to adjust the value.
3. Press
to select a test current multiplier. Normally you will use x 1/2 or x 1 for this test.
4. Repeat steps 4 through 6 listed in the preceding RCD tripping time procedure.
5. To view the nominal setting used for the test, depress the
arrow key.
Note:
The maximum setting for type A RCDs is 700 mA.
