MI 3125 EurotestCOMBO
Testing RCD
32
5.5 Testing RCDs
Various test and measurements are required for verification of RCD(s) in RCD protected
installations. Measurements are based on the EN 61557-6 standard.
The following measurements and tests (sub-functions) can be performed:
Contact voltage,
Trip-out time,
Trip-out current,
RCD autotest.
See chapter
4.1 Function selection
for instructions on
key functionality.
Figure 5.17: RCD test
Test parameters for RCD test and measurement
TEST RCD
sub-function
test [RCDt, RCD I, AUTO, Uc].
I
Δ
N
Rated
RCD residual current sensitivity I
Δ
N
[10 mA, 30 mA, 100 mA, 300 mA,
500 mA, 1000 mA].
type
RCD
type
[ , ]
,
test current
waveform
plus
starting
polarity
[
,
,
,
]
.
MUL
Multiplication
factor for test current [½, 1, 2, 5 I
Δ
N
].
Ulim Conventional
touch
voltage
limit
[25 V, 50 V].
Notes
:
Ulim can be selected in the Uc sub-function only.
The instrument is intended for testing of
G
eneral (non-delayed) and
S
elective (time-
delayed) RCDs, which are suited for:
Alternating residual current (AC type, marked with
symbol),
Pulsating residual current (A type, marked with symbol).
Pulsating residual current (A type, marked with symbol).
Time delayed RCDs have delayed response characteristics. As the contact voltage pre-
test or other RCD tests influence the time delayed RCD it takes a certain period to
recover into normal state. Therefore a time delay of 30 s is inserted before performing
trip-out test by default.
