Beha-Amprobe Telaris Series User Manual

Also see for Telaris ProInstall-100-CH: User manual

Beha-Amprobe Telaris Series User Manual Manual pdf 19 page image

15Measuring RCD Tripping TimeFigure 16. RCD Tripping Time Display/Switch and Terminal SettingsIn this test, a calibrated fault current is induced into the circuit, causing the RCD to trip. Themeter measures and displays the time required for the RCD to trip. You can perform this testwith test leads or using the mains cord. The test is performed with a live circuit.You can also use the tester to perform the RCD tripping time test in Auto mode, whichmakes it easier for one person to perform the test.Note: When measuring trip time for any type of RCD, the tester first does a pretest todetermine if the actual test will cause a fault voltage exceeding the limit (25 or 50 V).To avoid having an inaccurate trip time for S type (time delay) RCDs, a 30 second delay isactivated between the pretest and the actual test. This RCD type needs a delay because itcontains RC circuits that are required to settle before applying the full test.WWarning• Leakage currents in the circuit following the residual current protection device mayinfluence 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 causeconsiderable extension of the tripping time.Note: If the L and N terminals are reversed, the tester will auto-swap them internally andcontinue testing. If the tester is configured for UK operation, testing will halt and you willneed to determine why the L and N are swapped.This condition is indicated by symbol ( ).Type A and type B 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 x1 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)