Applications
Calibrating Residual Current Device (RCD) Testers 7
7-17
1. Using Figure 7-17, connect the UUT to the Calibrator’s L, PE, and N terminals.
2. Press R.
3. If
RCD Trip Time does not appear in the Output area of the display, press the Mode
softkey. Then, using the cursor keys or rotary knob, highlight Trip Time and select it
by pressing the Select softkey or pushing in on the rotary knob.
4. On the UUT, set the following parameters:
I multiplier set to 0.5xI
Nominal trip current (I
TRIP
) set.
S or G type RCD not set
AC or DC sensitive testing not set
Phase polarity not set
Maximum touch voltage not set
Note
Not all parameters can be accessed on the UUT, however, nominal trip
current must always be set or known.
5. On the Calibrator, make the following settings:
Nominal trip current (I
TRIP
) set to the same value the RCD is set to.
I multiplier coefficient set to 0.5xI
Series resistance of touch voltage will be simultaneously tested. The default
series resistance is set to the minimum value.
6. Press O.
The Calibrator connects the L and N terminals directly to the mains voltage and waits
for an external load to be connected by the UUT. If no load is sensed within 10
seconds, the Calibrator will switch to STBY.
7. On the UUT, push Start.
When the Calibrator measures 50% of nominal trip current, the trip time is displayed.
8. Compare the set nominal current value with the measured trip current on the
Calibrator.
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