HT instruments SPEED418 - Manual (Page 32)

400 Series
EN - 31
6. After the test is completed, if
the measured resistance
value matches the nominal
current and the set limit
contact voltage, RA<Ul/IdN
(1666Ω @ UL=50V and
IdN=30mA), the instrument
gives a double acoustic
signal and displays the
message “OK”, which
R C D
39

FRQ=50.0Hz Ut=1.4V
VP-N=228V VP-Pe=228V
Value of total earth resistance
Detected value for contact voltage Ut
compared to the nominal value of
the set residual current
OK
RA 30mA 50V
Func IdN RCD UL
signals that the test has been completed successfully, and displays a screen similar to
the one reported here to the side
7.
The results displayed can be saved by pressing the SAVE key twice or the
SAVE
key and, subsequently, the ENTER key (§ 9.1)
6.4.6. Description of anomalous results
1. By using the RA mode, if the
instrument detects a contact
voltage higher than the set
limit, it displays the message
reported here to the side.
Check the efficiency of the
protective conductor and the
earthing
R C D
39

FRQ=50.0Hz Ut=58.4V
VP-N=228V VP-Pe=228V
Dangerous contact voltage
NOT OK
RA 30mA 50V
Func IdN RCD UL
2. If the RCD trips in a time
exceeding the limits reported
in Tab. 5, the instrument
gives a long acoustic signal
which signals the negative
result of the test and then
displays a screen similar to
the one reported here to the
side. Check that the set type
of RCD matches the type of
RCD being tested
R C D
0°
487ms
FRQ=50.0Hz Ut=1.4V
VP-N=221V VP-Pe=221V
TIME NOT OK
The tripping time is not compliant
with Tab. 5
x1 30mA 50V
Func IdN RCD UL
3. If the RCD does not trip
within the maximum duration
of the test, the instrument
gives a long acoustic signal
which signals the negative
result of the test and then
displays a screen similar to
the one reported here to the
side. Check that the set type
of RCD matches the type of
RCD being tested
R C D
0°
>999ms
FRQ=50.0Hz Ut=1.4V
VP-N=221V VP-Pe=221V
TIME NOT OK
The RCD did not trip within the
maximum duration of the test
x1 30mA 50V
Func IdN RCD UL