DL9120 / DL9130
Operating Instructions
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5.12 RCD Variable Mode
The DL9120 / DL9130EV will only allow the RCD test to be
performed if the correct voltages are detected between line-
earth (L-PE illuminated), line-neutral (L-N illuminated) and
neutral-earth (N-PE
not
illuminated).
Potential fields from other earthing installations, large
voltages between the protective conductor and earth, large
voltage between the neutral and earth or leakage currents
in the circuit following the residual current protection device
may influence the measurement.
Equipment which is connected downstream of a residual
current protective device (RCD) may cause a considerable
extension of the operating time.
The DL9120 / DL9130EV will determine the fault voltage
that may appear on the protective conductor during the test.
If the fault voltage is greater than 25V the DL9130EV will
indicate >25V on the LCD, but the user may proceed with
the test. If the fault voltage is great than 50V, this is
indicated on the LCD and the test is inhibited.
Use the rotary dial to select the VAR RCD mode.
F1
F2
F3
F4
0
o
/ 180
o
RCD type
Increase
current
Decrease
current
0
o
/ 180
o
(F1)
Use the F1 key to alternate between the starting angle of the current. All
RCD tests will start on zero crossing. For type B RCDs 0
o
will perform
positive dc tests and for 180
o
negative dc tests.
AC/DC/Selective (F2)
Function key F2 is used to select the required RCD type: AC, DC sensitive
and pure DC combined with standard or selective RCD types. Each time
the F2 key is pressed the next option is selected
RCD Type AC (Sinusoidal Waveform)