5322A
Operators Manual
188
5. On the Product, make these settings:
Nominal trip current (I
TRIP
) set to the same value the RCD is set to.
I multiplier coefficient set to 0.5xI
Touch voltage can be set using the Touch V softkey.
6. Push .
The Product connects the L and N terminals directly to the mains voltage and
waits for an external load to be connected by the DUT. If no load is sensed
within 10 seconds, the Product will switch to STBY.
7. On the DUT, push Start.
When the Product 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
Product.
Some DUTs generate a prepulse before the tripping pulses. When the 0.5 I
Multiplier constant is used on the DUT, the amplitude of a prepulse is
approximately the same level as the tripping pulse. The Product can recognize
and ignore the prepulse when the setup trip time is higher than two periods of
line frequency wave. For example, when supplied from 50 Hz mains, the
prepulse is ignored when the trip time is set in the Product to 40 ms or a higher
value. If the trip time is <40 ms, the Product cannot recognize the first pulse as a
prepulse and trips.
PE
(L2/Green)
Fluke 5322A
Fluke 1653
L
(L1/Red)
N
(L3/Blue)
iep041.eps
Figure 49. RCD Trip Time and Trip Current Calibration
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