NOVA AND NOVA PRO
Measurements
34
Figure 5-26: Step 7 RCD autotest results
8.
Ramp test measurement with the following measurement parameters:
•
Test current started with the negative half-wave at 180
0
.
This measurement determine the minimum current required to trip the
RCD. After the measurement has been started, the test current generated
by the instrument is continuously increased, until the RCD trips. The
following menu is displayed:
Figure 5-27: Step 8 RCD autotest results
Displayed results:
x1
(left) .........Step 1 trip-out time result, t3 (I
ΔN
, 0
0
),
x1
(right) ....... Step 2 trip-out time result, t4 (I
ΔN
, 180
0
),
x5
(left) .........Step 3 trip-out time result, t5 (5
I
ΔN
, 0
0
),
x5
(right) ....... Step 4 trip-out time result, t6 (5
I
ΔN
, 180
0
),
x
½ (left) ........Step 5 trip-out time result, t1 (½
I
ΔN
, 0
0
),
x
½ (right) ...... Step 6 trip-out time result, t2 (½
I
ΔN
, 180
0
),
IΔ (+) .......... Step 7 trip-out current ((+) positive polarity)
IΔ (-) ........... Step 8 trip-out current ((-) negative polarity)
Uc ............
Contact voltage for rated I
ΔN
.
