TESTBOY TV 450
Testing RCD
40
Displayed results:
I ...........Trip-out current,
Uci
Contact voltage at trip-out current I or end value in case the RCD didn’t
trip,
t ...........Trip-out time.
5.4.4 RCD Autotest
RCD autotest function is intended to perform a complete RCD test (trip-out time at
different residual currents, trip-out current and contact voltage) in one set of automatic
tests, guided by the instrument.
Additional key:
HELP / DISPLAY
Toggles between top and bottom part of results field.
RCD autotest procedure
* model TESTBOY TV 450 (TYPE B)
RCD Autotest steps
Notes
Select the
RCD
function using the function selector switch.
Set sub-function
AUTO.
Set test
parameters
(if necessary).
Connect
test cable to the instrument.
Connect
test leads to the to the item to be tested (see
figure 5.17
).
Press the
TEST
key to perform the test.
Start of test
Test with I
Δ
N
, 0
°
(step 1).
RCD should trip-out
Re-activate
RCD.
Test with I
Δ
N
, 180
°
(step 2).
RCD should trip-out
Re-activate
RCD.
Test with 5
×
I
Δ
N
, 0
°
(step 3).
RCD should trip-out
Re-activate
RCD.
Test with 5
×
I
Δ
N
, 180
°
(step 4).
RCD should trip-out
Re-activate
RCD.
Test with ½
×
I
Δ
N, 0
°
(step 5).
RCD should not trip-
out
Test with ½
×
I
Δ
N, 180
°
(step 6).
RCD should not trip-
out
Trip-out current test, 0
°
(step 7).
RCD should trip-out
Re-activate
RCD.
Trip-out current test, 180
°
(step 8).
RCD should trip-out
Re-activate
RCD.
Store
the result by pressing the MEM key (optional)*.
End of test
