Rcd Test; Tripping Time Rcdt (Auto) - Benning IT 105 Notice D'emploi

8.6 RCD test

Measurement requires correct connection of the mains voltage to the BENNING IT 105 as
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shown in figures 4, 5 or 6. The mains voltage indicator must light permanently:
If the mains voltage indicator flashes, turn the shock-proof plug of the test cable by 180° or check the
measuring leads for correct connection.
Potential fields from other earthing systems, considerable voltage differences between pro-
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tective conductor and earth, protective conductor and neutral conductor or fault currents
behind the RCD might influence the measurement.
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The measuring time might be extended by connected loads behind the RCD.

8.6.1 Tripping time RCDt (AUTO)

Automatic measurement of the tripping time is a test consequence of single measurements with different
multipliers and initial polarities (0°/180°) of the nominal fault current (I∆N). The test is continued automati-
cally each time the RCD is switched on again.
- Select the desired function RCDt (AUTO) I with the rotary switch 1 .
- The symbols of the function keys F1 A to F4 D are briefly shown on the digital display 2 . You can
use the function keys F1 to F4 3 to make the following settings:
F1
–
RCD type (F2):
sinusoidal test current
pulsating test current
selective (delayed) RCD
For testing selective RCDs, measurement starts after a time delay of 30 seconds.
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½ x I∆N at 0°, ½ x I∆N at 180°
1 x I∆N at 0°, 1 x I∆N at 180°
5 x I∆N at 0°, 5 x I∆N at 180°
F2
► ►
BENNING IT 105
F3
►

F4
I∆N
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